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1. Assessment of Charophyta Flora and Ecological Status in Two High-Mountain Lakes (Rize, Turkey)

Author:
Bülent Şahin; Sophia Barinova
Source:
Transylvanian review of systematical and ecological research 2022 v.24 no.1 pp. 35-54
ISSN:
2344-3219
Subject:
Closterium; Cosmarium; Euastrum; Staurastrum; algae; altitude; ecosystems; eutrophication; flora; indicator species; lakes; research; water quality
Abstract:
... The benthic algal composition of Charophyta in the Avusor Great Lake and Koçdüzü Great Lake at the altitude of about 3,000 m a.s.l. was investigated on 21 August 2019. A total of 112 species, belonging to Zygnematophyceae, were identified. The genera Cosmarium (44), Staurastrum (16), Closterium (15), and Euastrum (13) were most abundant. The members of filamentous charophyta were represented by tw ...
DOI:
10.2478/trser-2022-0003

2. Biomonitoring of freshwater lentic habitats using desmids

Author:
Karunya Shetty; Krishnakumar Gulimane
Source:
Limnology 2022 v.23 no.1 pp. 245-251
ISSN:
1439-8621
Subject:
Closterium; Cosmarium; Micrasterias; Netrium; Staurastrum; drinking water; environmental monitoring; eutrophication; flora; freshwater; indicator species; lentic systems; limnology; species richness; statistical analysis; water quality; India
Abstract:
... Freshwater ponds besides being a source of potable water, also serve as a habitat for a range of aquatic organisms. The quality of the pond water is dependent on several interrelated parameters like physical, chemical and biological factors which render the water source either fit or unfit for consumption. In this communication, we have discussed the utilization of the desmids flora in assessing t ...
DOI:
10.1007/s10201-021-00664-0

3. Disentangling the drivers of phytoplankton community composition in a heavily sediment-laden transcontinental river

Author:
Yitong Ding; Ming Li; Baozhu Pan; Gengnan Zhao; Li Gao
Source:
Journal of environmental management 2022 v.302 pp. 113939
ISSN:
0301-4797
Subject:
Asterionella; Chlamydomonas; Closteriopsis; Closterium; Cyclotella; Diatoma; Fragilaria; Gyrosigma; Navicula; Pandorina; Phormidium; Synedra; biomass; carbon; cluster analysis; community structure; energy flow; environmental management; phytoplankton; rivers; water quality; watersheds; Yellow River
Abstract:
... Phytoplankton play a crucial role in energy flow and carbon cycling in aquatic ecosystems; however, exploring the driving factors influencing phytoplankton, especially in heavily sediment-laden rivers, is challenging. We analyzed 704 samples from 44 sampling sites along the Yellow River to investigate the biogeographic, environmental, and anthropogenic impacts on the phytoplankton community compos ...
DOI:
10.1016/j.jenvman.2021.113939

4. Diversity and Ecology of Non-Diatom Algae in a Swampy Mountain Lake of the Suntar-Khayat Ridge (Republic Sakha, Yakutia, Russia)

Author:
Liubov Kopyrina; Elena Pshennikova; Sophia Barinova
Source:
Transylvanian review of systematical and ecological research 2022 v.24 no.1 pp. 17-34
ISSN:
2344-3219
Subject:
Closterium; Cosmarium; Siberia; altitude; flora; lakes; research; species diversity; Arctic region
Abstract:
... The first studied flora of a mountain lake on the Suntar-Khayat ridge was represented by 170 species of non-diatoms in addition to 112 previously studied diatoms. The calculated similarity indices, correlation analysis and bioindication showed the uniqueness of the non-diatom flora, dominated by charophytes in general and species of the genera Cosmarium and Closterium. The results of the study of ...
DOI:
10.2478/trser-2022-0002

5. Highly efficient transformation of the model zygnematophycean alga Closterium peracerosum‐strigosum‐littorale complex by square‐pulse electroporation

Author:
Junko Kawai; Manaki Kanazawa; Rie Suzuki; Nanako Kikuchi; Yasuhiko Hayakawa; Hiroyuki Sekimoto
Source:
The new phytologist 2022 v.233 no.1 pp. 569-578
ISSN:
0028-646X
Subject:
Closterium; algae; cell walls; electroporation; gene targeting; genetic transformation; labor; phylogeny; reverse genetics
Abstract:
... The zygnematophycean algae occupy an important phylogenetic position as the closest living relatives of land plants. Reverse genetics is quite useful for dissecting the functions of genes. However, this strategy requires genetic transformation, and there are only a few reports of successful transformation in zygnematophycean algae. Here, we established a simple and highly efficient transformation ...
DOI:
10.1111/nph.17763

6. Molecular cloning and oxidative‐stress responses of a novel Phi class glutathione S‐transferase (GSTF) gene in the freshwater algae Closterium ehrenbergii

Author:
Sofia Abassi; Hui Wang; Hansol Kim; Jang‐Seu Ki
Source:
Environmental toxicology 2022 v.37 no.4 pp. 789-801
ISSN:
1520-4081
Subject:
Closterium; ecotoxicology; exposure duration; freshwater; genes; glutathione transferase; oxidative stress
Abstract:
... Glutathione S‐transferases (GSTs) belong to a family of enzymes involved in diverse biological processes, including detoxification and protection against oxidative damage. Here, we determined the full‐length sequence (915 bp) of a novel Phi class cytosolic glutathione S‐transferase (GSTF) gene from the green algae Closterium ehrenbergii. We examined the gene structure and expression patterns in re ...
DOI:
10.1002/tox.23443

7. Seasonal variation of desmids diversity (zygnematales, zygnemaceae) from Jim Corbett National Park (JCNP), India

Author:
Abhinav Sharma; Kiran Toppo; Rajan Kumar Gupta
Source:
The Journal of the Indian Botanical Society 2022 v.102 no.1 pp. 6-29
ISSN:
2455-7218
Subject:
Closterium; Cosmarium; Cylindrocystis; Euastrum; Micrasterias; Netrium; Penium; Staurastrum; flora; freshwater ecosystems; habitats; monsoon season; national parks; seasonal variation; summer; winter; India
Abstract:
... The present paper is an exclusive contribution of the desmids flora of Jim Corbett National Park (JCNP), Uttarakhand, India. The study revealed 51 desmids taxa which included Cosmarium (29 taxa), Closterium (11 taxa), Euastrum (3 taxa), Cylindrocystis (2 taxa) and a single taxon of Micrasterias, Pleurotaeium, Penium, Staurastrum, Heimansia and Netrium were reported from the samples collected durin ...
DOI:
10.5958/2455-7218.2022.00003.1

8. Diverse drivers of phytoplankton dynamics in different phyla across the annual cycle in a freshwater lake

Author:
Yanran Li; Zhengda Yu; Shuping Ji; Jiao Meng; Qiang Kong; Renqing Wang; Jian Liu
Source:
Journal of freshwater ecology 2021 v.36 no.1 pp. 13-29
ISSN:
2156-6941
Subject:
Closterium; Scenedesmus quadricauda; autumn; dominant species; freshwater; freshwater lakes; limnology; oxygen; pH; phytoplankton; reproduction; species richness; summer; water management
Abstract:
... An understanding of the annual variations in the phytoplankton community in freshwater lakes, and of the drivers responsible for these variations, is essential for lake management. In this study we collected and analyzed seasonal samples of phytoplankton and assessed environmental variables in Nansi Lake from 2011 to 2015, in order to identify the seasonal dynamics of the phytoplankton community a ...
DOI:
10.1080/02705060.2020.1868586

9. Fabrication and synergistic antibacterial and antifouling effect of an organic/inorganic hybrid coating embedded with nanocomposite Ag@TA-SiO2 particles

Author:
Yajun Deng; Guang-Ling Song; Dajiang Zheng; Yanmei Zhang
Source:
Colloids and surfaces 2021 v.613 pp. 126085
ISSN:
0927-7757
Subject:
Closterium; Escherichia coli; X-ray photoelectron spectroscopy; adsorption; atomic force microscopy; biocides; biofouling; composite polymers; copolymerization; crosslinking; free radicals; microalgae; nanocomposites; nuclear magnetic resonance spectroscopy; silica; tannins
Abstract:
... The combination of antifouling and biocidal methods is an efficient antimicrobial strategy to alleviate environmental biofouling. Herein, a functional organic/inorganic hybrid coating with integrated terpolymer and hybrid Ag@TA-SiO₂ nano spheres was designed and fabricated for antifouling purpose for the first time. The silicon-containing terpolymer (GHM) was fabricated via a simplified free radic ...
DOI:
10.1016/j.colsurfa.2020.126085

10. Freshwater phytoplankton: Salinity stress on arsenic biotransformation

Author:
Rimana Islam Papry; Shogo Fujisawa; Yinghan Zai; Okviyoandra Akhyar; Asami Suzuki Mashio; Hiroshi Hasegawa
Source:
Environmental pollution 2021 v.270 pp. 116090
ISSN:
0269-7491
Subject:
Closterium; Pediastrum; Scenedesmus; Staurastrum; arsenates; arsenic; arsenites; biotransformation; culture media; freshwater; methylation; microalgae; models; phosphates; phytoplankton; pollution; salinity; salt stress
Abstract:
... Salinity stress affects aquatic microalgal growth and their physiological responses have been studied extensively. However, arsenic (As) accumulation and biotransformation by freshwater phytoplankton under a salinity gradient have never been addressed. This study reports a distinctive pattern of As uptake, accumulation, and biotransformation by four axenic freshwater phytoplankton species, i.e., S ...
DOI:
10.1016/j.envpol.2020.116090

11. Phytoplankton Communities of the Vychegda River in the Area of Treated-Wastewater Intake from the Pulp and Paper Industry

Author:
E. N. Patova; A. S. Stenina; Y. N. Shabalina; I. N. Sterlyagova
Source:
Contemporary problems of ecology 2021 v.14 no.6 pp. 633-641
ISSN:
1995-4255
Subject:
Aulacoseira; Closterium; Diadesmis; Dolichospermum; Eudorina; Euglenozoa; Ochrophyta; Pandorina; Rhodophyta; algae; biomass; ecosystems; eurytopic species; indicator species; phytoplankton; pulp and paper industry; pulp and paper mills; rivers; summer; thermal pollution; wastewater
Abstract:
... The results are presented for a study of summer phytoplankton (July 2018–2020) in the middle reaches of the Vychegda River at the sites where treated wastewater is discharged from the Mondi Syktyvkar JSC pulp and paper mill. In the phytoplankton of the studied section of the river, 263 species with algal varieties from seven divisions were identified: Cyanoptokaryota, 8; Ochrophyta, 4; Rhodophyta ...
DOI:
10.1134/S1995425521060093

12. Molecular characterization and expression analysis of copper‐zinc superoxide dismutases from the freshwater alga Closterium ehrenbergii under metal stress

Author:
Hui Wang; Jang‐Seu Ki
Source:
Environmental toxicology 2020 v.35 no.1 pp. 5-14
ISSN:
1520-4081
Subject:
Chlorophyta; Closterium; algae; antioxidant activity; aquatic environment; binding sites; biomarkers; chloroplasts; copper; enzyme activity; freshwater; gene expression; genes; heavy metals; monitoring; photosynthesis; phylogeny; proteins; quantitative polymerase chain reaction; reactive oxygen species; signal peptide; superoxide dismutase; toxicity testing; zinc
Abstract:
... Superoxide dismutase (SOD) acts as the first line of defense against reactive oxygen species (ROS) within cells. In the present study, we determined two novel CuZnSOD genes (designated as CeCSD1 and CeCSD2) from the toxicity‐testing freshwater algae Closterium ehrenbergii and examined their structural features, phylogenetic relationships, and gene expression under exposure to different metals. Put ...
DOI:
10.1002/tox.22837

13. Phytoplankton diversity in relation to physicochemical attributes and water quality of Mandakini River, Garhwal Himalaya

Author:
Rahul Kumar; Rama Kumari; Chandi Prasad; Vijayta Tiwari; Neetu Singh; Swati Mohapatra; Ramchander Merugu; Stanzin Namtak; Akash Deep
Source:
Environmental monitoring and assessment 2020 v.192 no.12 pp. 799
ISSN:
0167-6369
Subject:
Anabaena; Chlorococcum; Cladophora glomerata; Closterium; Cylindrospermum; Cymbella; Diatoma; Didymosphenia geminata; Fragilaria; Frustulia; Hydrodictyon; Navicula; Nodularia; Oedogonium; Oscillatoria sancta; Spirogyra; Synedra ulna; Ulothrix; Volvox; Zygnema; phytoplankton; rivers; species diversity; water quality; Himalayan region
Abstract:
... Phytoplankton are important biological indicators of water quality. This current study assessed the physicochemical parameters and phytoplankton diversity of Mandakini River, an important tributary of the River Ganga. Water and phytoplankton samples were collected from three sampling sites located at three different altitudes for a period of twelve months (July 2018–June 2019). Water samples were ...
DOI:
10.1007/s10661-020-08768-3

14. Seasonal Succession of Phytoplankton Functional Groups and Driving Factors of Cyanobacterial Blooms in a Subtropical Reservoir in South China

Author:
Lingai Yao; Xuemin Zhao; Guang-Jie Zhou; Rongchang Liang; Ting Gou; Beicheng Xia; Siyang Li; Chang Liu
Source:
Water 2020 v.12 no.4 pp. -
ISSN:
2073-4441
Subject:
Closterium; Cosmarium; Cryptomonas; Microcystis aeruginosa; Staurastrum; Staurodesmus; algae; autumn; biomass; cells; classification; density; freshwater; hydrodynamics; moieties; nitrogen; occurrence; phosphorus; phytoplankton; public water supply; seasonal variation; spatial variation; species richness; spring; summer; temperature; winter; China
Abstract:
... Freshwater phytoplankton communities can be classified into a variety of functional groups that are based on physiological, morphological, and ecological characteristics. This classification method was used to study the temporal and spatial changes in the phytoplankton communities of Gaozhou Reservoir, which is a large municipal water source in South China. Between January 2015 and December 2017, ...
DOI:
10.3390/w12041167

15. Dielectrophoretic separation of microalgae cells in ballast water in a microfluidic chip

Author:
Yanjuan Wang; Junsheng Wang; Xudong Wu; Zong Jiang; Wei Wang
Source:
Electrophoresis 2019 v.40 no.6 pp. 969-978
ISSN:
0173-0835
Subject:
Closterium; bacteria; ballast water; dielectrophoresis; electric field; electrodes; electrophoresis; microalgae; microparticles; microplastics; organ-on-a-chip
Abstract:
... The composition of the ship's ballast water is complex and contains a large number of microalgae cells, bacteria, microplastics, and other microparticles. To increase the accuracy and efficiency of detection of the microalgae cells in ballast water, a new microfluidic chip for continuous separation of microalgae cells based on alternating current dielectrophoresis was proposed. In this microfluidi ...
DOI:
10.1002/elps.201800302

16. Phytoplankton assemblages and community structure in tropical temporary freshwater ponds in sub‐Saharan Africa1

Author:
Bilassé Zongo; Frédéric Zongo; Adjima Thiombiano; Joseph I. Boussim
Source:
Journal of phycology 2019 v.55 no.4 pp. 789-800
ISSN:
0022-3646
Subject:
Closterium; Euglena; Lyngbya; Pseudanabaena; Sahel; Trachelomonas; algae; chemical analysis; climatic factors; community structure; computer software; conservation areas; dissolved oxygen; formalin; freshwater; habitats; indicator species; light microscopy; multivariate analysis; nitrates; phytoplankton; ponds; species richness; Burkina Faso
Abstract:
... Anthropogenic and climatic factors are important determinants of algal distribution in aquatic systems. This study aimed to identify temporary pond‐groups of phytoplankton assemblages and to establish the interactions between environmental variables and phytoplankton structure. Phytoplankton samples were collected and preserved with 5% formalin; water samples for chemical analysis were taken in Au ...
DOI:
10.1111/jpy.12843

17. Small heat shock protein genes of the green algae Closterium ehrenbergii: Cloning and differential expression under heat and heavy metal stresses

Author:
Sofia Abassi; Hui Wang; Thangaraj Ponmani; Jang‐Seu Ki
Source:
Environmental toxicology 2019 v.34 no.9 pp. 1013-1024
ISSN:
1520-4081
Subject:
Chlorophyta; Closterium; amino acids; biomarkers; chaperonins; chloroplasts; complementary DNA; dose response; freshwater; gene expression regulation; genes; heat; heat shock proteins; heat stress; heavy metals; models; open reading frames; reactive oxygen species; stress response; toxic substances; toxicity; transcription (genetics)
Abstract:
... The freshwater green algae Closterium ehrenbergii has been considered as a model for eco‐toxicological assessment in aquatic systems. Heat shock proteins (HSPs) are a class of highly conserved proteins produced in all living organisms, which participate in environmental stress responses. In the present study, we determined the cDNA sequences of small heat shock protein 10 (sHSP10) and sHSP17.1 fro ...
DOI:
10.1002/tox.22772

18. The genus Closterium, a new model organism to study sexual reproduction in streptophytes

Author:
Yuki Tsuchikane; Hiroyuki Sekimoto
Source:
new phytologist 2019 v.221 no.1 pp. 99-104
ISSN:
0028-646X
Subject:
Closterium; algae; ancestry; cell communication; embryophytes; genes; genetic engineering; genomics; heterothallic strains; homothallic strains; homothallism; inheritance (genetics); models; phylogeny; sexual reproduction; zygospores
Abstract:
... Contents Summary 99 I. Introduction 99 II. Life cycle of Closterium 100 III. Sexual reproductive processes in the heterothallic Closterium peracerosum‐strigosum‐littorale complex 101 IV. Homothallism in the C. psl. complex 102 V. Sexual reproduction and inheritance of mating types in Closterium ehrenbergii 102 VI. mt‐determining gene of the C. psl. complex 103 VII. Future perspectives 103 Acknowle ...
DOI:
10.1111/nph.15334

19. Assessment of water quality and phytoplankton community of Limpenaeus vannamei pond in intertidal zone of Hangzhou Bay, China

Author:
Meng Ni; Ju-lin Yuan; Mei Liu; Zhi-min Gu
Source:
Aquaculture reports 2018 v.11 pp. 53-58
ISSN:
2352-5134
Subject:
Closterium; Merismopedia; Schroederia; ammonia; biomass; dissolved oxygen; dominant species; littoral zone; multivariate analysis; nitrates; nitrites; oxygen; pH; phosphates; phytoplankton; pollution; principal component analysis; salinity; surface water; temperature; total nitrogen; total phosphorus; water quality; water quality standards; China
Abstract:
... This study was conducted to understand the associations between water quality and the phytoplankton community in intertidal mudflat pond of Limpenaeus vannamei, in the region around Hangzhou Bay. The water parameters at each sampling site were measured monthly including temperature, pH, dissolved oxygen, salinity, ammonia, natrite, nitrite, total nitrogen, total phosphateand CODMn. The cultivation ...
DOI:
10.1016/j.aqrep.2018.06.002

20. Identification of a new mating group and reproductive isolation in the Closterium peracerosum–strigosum–littorale complex

Author:
Yuki Tsuchikane; Hiroka Kobayashi; Machi Kato; Juri Watanabe; Jiunn-Tzong Wu; Hiroyuki Sekimoto
Source:
Journal of plant research 2018 v.131 no.5 pp. 735-746
ISSN:
0918-9440
Subject:
Closterium; algae; coculture; embryophytes; phylogeny; protoplasts; reproductive isolation; sex pheromones; sexual reproduction; zygospores
Abstract:
... Reproductive isolation is essential for the process of speciation. In order to understand speciation, it is necessary to compare one mating group with other phylogenetically related but reproductively isolated groups. The Closterium peracerosum–strigosum–littorale (C. psl.) complex is a unicellular isogamous zygnematophycean alga, which is believed to share a close phylogenetic relationship with t ...
DOI:
10.1007/s10265-018-1043-8

21. Photosynthetic and biochemical responses of the freshwater green algae Closterium ehrenbergii Meneghini (Conjugatophyceae) exposed to the metal coppers and its implication for toxicity testing

Author:
Hui Wang; Vinitha Ebenezer; Jang-Seu Ki
Source:
journal of microbiology 2018 v.56 no.6 pp. 426-434
ISSN:
1225-8873
Subject:
Chlorophyta; Closterium; copper; copper sulfate; exposure duration; lipid peroxidation; median effective concentration; oxidative stress; photosynthesis; superoxide dismutase; toxicity; toxicity testing; water quality
Abstract:
... The freshwater green algae Closterium is sensitive to water quality, and hence has been suggested as ideal organisms for toxicity testing. In the present study, we evaluated the photosynthetic and biochemical responses of C. ehrenbergii to the common contaminants, coppers. The 72 h median effective concentrations (EC₅₀) of CuSO₄ and CuCl₂ on the test organism were calculated to be 0.202 mg/L and 0 ...
DOI:
10.1007/s12275-018-8081-8

22. Succession of phytoplankton functional groups and their driving factors in a subtropical plateau lake

Author:
Jing Cao; Zeying Hou; Zekun Li; Zhaosheng Chu; Pingping Yang; Binghui Zheng
Source:
Science of the total environment 2018 v.631-632 pp. 1127-1137
ISSN:
0048-9697
Subject:
Closterium; Cryptomonas; Fragilaria; Melosira; Microcystis; Mougeotia; altitude; autumn; lakes; mixing; moieties; monsoon season; nonpoint source pollution; nutrients; phytoplankton; pollutants; runoff; seasonal variation; spring; summer; temperature; wet season; winter; China
Abstract:
... The present study was carried out in a mesotrophic subtropical plateau lake, Erhai, located in southwest of China. The succession of phytoplankton functional groups and the environmental variables in the lake were investigated from January 2013 to December 2015. The lake had strong radiation levels and a low-temperature amplitude because of its high elevation and strongly mixed water. It was highl ...
DOI:
10.1016/j.scitotenv.2018.03.026

23. Phytoplankton as biomonitors: A study of Museum Lake in Government Botanical Garden and Museum, Thiruvananthapuram, Kerala India

Author:
Anila P. Ajayan; K. G. Ajit Kumar
Source:
Lakes & reservoirs 2017 v.22 no.4 pp. 403-415
ISSN:
1320-5331
Subject:
Ankistrodesmus; Closterium; Crucigenia; Euglena; Kirchneriella; Merismopedia; Nitzschia; Oscillatoria; Pandorina; Pinnularia; Scenedesmus quadricauda; Synedra; Trachelomonas; botanical gardens; correspondence analysis; ecosystems; environmental factors; eutrophication; indicator species; lakes; microalgae; phytoplankton; pollution load; riparian vegetation; surface water; India
Abstract:
... An assessment of the pollution status of Museum Lake in the Thiruvananthapuram Botanical Garden and Museum was conducted. Analysis of different community structures of the planktonic taxa in the lake revealed it is organically polluted, attributable to the organic litter from riparian vegetation. A total of 30 most pollution‐tolerant phytoplankton genera and 24 pollution‐tolerant species were iden ...
DOI:
10.1111/lre.12199

24. Sexual reproduction and sex determination in green algae

Author:
Hiroyuki Sekimoto
Source:
Journal of plant research 2017 v.130 no.3 pp. 423-431
ISSN:
0918-9440
Subject:
Chlamydomonas reinhardtii; Closterium; Volvox; adhesion; agglutinins; algae; cell fusion; chemical elements; evolution; freshwater; genes; germ cells; heterothallic strains; loci; membrane fusion; sex determination; sex pheromones; sexual reproduction
Abstract:
... The sexual reproductive processes of some representative freshwater green algae are reviewed. Chlamydomonas reinhardtii is a unicellular volvocine alga having two mating types: mating type plus (mt⁺) and mating type minus (mt⁻), which are controlled by a single, complex mating-type locus. Sexual adhesion between the gametes is mediated by sex-specific agglutinin molecules on their flagellar membra ...
DOI:
10.1007/s10265-017-0908-6

25. Desmid flora in the lakes of the Khrebtovyi Nature Reserve in the Polar Ural (Russia) / Dvyniečių flora Chrebtovyj draustinio ežeruose Šiaurės Urale (Rusija)

Author:
Rima Briškaitė; Elena Patova; Sigitas Juzėnas
Source:
Botanica Lithuanica 2016 v.22 no.2 pp. 113-122
ISSN:
2029-932X
Subject:
Closterium; Cosmarium; Sphagnum; Staurastrum; conservation areas; flora; habitats; lakes; mosses and liverworts; mountains; Russia
Abstract:
... Fourteen thermokarst lakes and one mountain lake were explored in the study period. A total of 116 species of desmids belonging to 22 genera were identified. The genera Cosmarium (29), Staurastrum (18) and Closterium (13) were most abundant. The highest number of species (88) was recorded in the habitats with Sphagnum and brown mosses. Twenty-seven species and one variety of desmids were observed ...
DOI:
10.1515/botlit-2016-0012

26. A Receptor-Like Kinase, Related to Cell Wall Sensor of Higher Plants, is Required for Sexual Reproduction in the Unicellular Charophycean Alga, Closterium peracerosum–strigosum–littorale Complex

Author:
Naoko Hirano; Yuka Marukawa; Jun Abe; Sayuri Hashiba; Machiko Ichikawa; Yoichi Tanabe; Motomi Ito; Ichiro Nishii; Yuki Tsuchikane; Hiroyuki Sekimoto
Source:
Plant & cell physiology 2015 v.56 no.7 pp. 1456-1462
ISSN:
0032-0781
Subject:
Closterium; algae; cell walls; embryophytes; genes; osmotic pressure; protein kinases; sexual reproduction; zygote
Abstract:
... Here, we cloned the CpRLK1 gene, which encodes a receptor-like protein kinase expressed during sexual reproduction, from the heterothallic Closterium peracerosum–strigosum–littorale complex, one of the closest unicellular alga to land plants. Mating-type plus (mt ⁺) cells with knockdown of CpRLK1 showed reduced competence for sexual reproduction and formed an abnormally enlarged conjugation papill ...
DOI:
10.1093/pcp/pcv065

27. Designing environmentally benign modified silica resin coatings with biomimetic textures for antibiofouling

Author:
Zifei Chen; Wenjie Zhao; Jihai Xu; Mengting Mo; Shusen Peng; Zhixiang Zeng; Xuedong Wu; Qunji Xue
Source:
RSC advances 2015 v.5 no.46 pp. 36874-36881
ISSN:
2046-2069
Subject:
Closterium; Fourier transform infrared spectroscopy; Navicula; atomic force microscopy; biomimetics; coatings; contact angle; crabs; leaf morphology; leaves; microalgae; silica; wettability
Abstract:
... Siloxane modified acrylic resin coatings with positive and negative replication textures were successfully fabricated by biomimicking the surface structures of natural lotus leaf and white crab shell via a replication method. The physical and chemical properties of the as-prepared coatings were systematically characterized by FT-IR spectroscopy, SEM, AFM and contact angle measurements. Moreover, t ...
DOI:
10.1039/c5ra04658k

28. Evaluation and selection of reference genes for ecotoxicogenomic study of the green alga Closterium ehrenbergii using quantitative real-time PCR

Author:
Min-Ah Lee; Ruoyu Guo; Vinitha Ebenezer; Jang-Seu Ki
Source:
Ecotoxicology 2015 v.24 no.4 pp. 863-872
ISSN:
0963-9292
Subject:
Closterium; computer software; essential genes; freshwater; gene expression; gene expression regulation; heat shock response; heat-shock protein 70; metals; models; quantitative polymerase chain reaction; reverse transcriptase polymerase chain reaction; ribosomal RNA; toxicity
Abstract:
... The green alga Closterium ehrenbergii occurs in fresh water environments and has been suggested as a model for ecotoxicological assessment. Quantitative real-time PCR (qRT-PCR), with its high sensitivity and specificity, is a preferred method for reliable quantification of gene expression levels. qRT-PCR requires reference genes to normalize the transcription level of the target gene, and selectio ...
DOI:
10.1007/s10646-015-1430-z

29. The possible allelopathic effect of Hydrilla verticillata on phytoplankton in nutrient-rich water

Author:
Hongjie Gao; Yonghui Song; Chunjian Lv; Xiaomin Chen; Huibin Yu; Jianfeng Peng; Mei Wang
Source:
Environmental earth sciences 2015 v.73 no.9 pp. 5141-5151
ISSN:
1866-6280
Subject:
algae control; hexanols; phytoplankton; Closterium; Hydrilla verticillata; allelochemicals; allelopathy; Dactylococcopsis; growth retardation; Microcystis aeruginosa; Chlamydomonadales; Ankistrodesmus falcatus; biomass
Abstract:
... Algae control by using allelochemicals secreted from plants is a safe and novel biological algal inhibiting technology. In this work, Hydrilla verticillata was cultivated with algae in coexisting systems, and its possible inhibitory effect and mechanism on planktonic algae were studied in eutrophic water. The results showed that 12 g L⁻¹H. verticillata under nutrient sufficient conditions had an a ...
DOI:
10.1007/s12665-015-4316-8

30. Detailed analyses on the parthenospore formation in Closterium moniliferum (Zygnematophyceae, Charophyta)

Author:
Yuki Tsuchikane; Ayaka Nakai; Hiroyuki Sekimoto
Source:
Phycologia 2014 v.53 no.6 pp. 571-578
ISSN:
2330-2968
Subject:
Closterium; Japan; callose; cell division; cell walls; cytoplasm; paddies; photography; phylogeny; rice; sporangia
Abstract:
... A parthenosporic strain of Closterium moniliferum (strain izu76-1) was isolated from a rice paddy field in Japan. Molecular phylogenic analysis was used to verify the initial species determination based on its morphology, and it was confirmed to be closely related to another identified strain of the species. By using time-lapse photography, the process of parthenospore formation was observed and c ...
DOI:
10.2216/14-35R1.1

31. Iron and Arsenic Speciation and Distribution in Organic Flocs from Streambeds of an Arsenic-Enriched Peatland

Author:
ThomasArrigo Laurel K.; Mikutta Christian; Byrne James; Barmettler Kurt; Kappler Andreas; Kretzschmar Ruben
Source:
Environmental Science & Technology 2014 v.48 no.22 pp. 13218-13228
ISSN:
1520-5851
Subject:
Chlorophyta; Closterium; X-radiation; X-ray absorption spectroscopy; X-ray diffraction; X-ray fluorescence spectroscopy; algae; arsenates; arsenic; arsenites; carbohydrates; ferrihydrite; freshwater; iron; lepidocrocite; nanocrystals; oxides; pH; peatlands; sorbents; stream channels; surface water; Switzerland
Abstract:
... Iron-rich organic flocs are frequently observed in surface waters of wetlands and show a high affinity for trace metal(loid)s. To date, spectroscopic speciation analyses of Fe and trace elements in these mineral-organic matter (OM) associations are missing. In this study, we investigated the speciation and distribution of Fe and As in flocs collected from low-flow streams (pH 5.3–6.3) of the natur ...
DOI:
10.1021/es503550g

32. A hybrid nanoparticle matrix for mass spectrometry

Author:
Po-Han Li; Shin-Yi Huang; Yu-Chie Chen; Pawel L. Urban
Source:
RSC advances 2013 v.3 no.19 pp. 6865-6870
ISSN:
2046-2069
Subject:
Closterium; aerosols; algae; ammonia; image analysis; mass spectrometry; metabolites; nanoparticles; silica; spraying; toxicity; vapors
Abstract:
... We demonstrate hybrid inorganic–organic nanoparticles —based on silicon dioxide and 9-aminoacridine— which can enhance mass spectrometric analysis and imaging in the negative-ion mode. The nanoparticles bind to the surface of cells while still in the liquid phase, which is followed by a controlled release of the organic matrix molecules triggered by alkaline ammonia vapours delivered to the specim ...
DOI:
10.1039/c3ra22977g

33. Adaptive strategies of desmids in two tropical monomictic lakes in southeast Brazil: do morphometric differences promote life strategies selection?

Author:
L. G. Barbosa; F. A. R. Barbosa; C. E. M. Bicudo
Source:
Hydrobiologia 2013 v.710 no.1 pp. 157-171
ISSN:
0018-8158
Subject:
Closterium; Pleurotaenium; Staurastrum; Staurodesmus; biomass; lakes; morphometry; Brazil
Abstract:
... Adaptive strategies of desmids in two tropical monomictic lakes were studied in relation to morphometric differences. The study aimed at evaluating desmids' strategies during inter-annual succession patterns in two tropical lakes (Dom Helvécio and Carioca) in southeast Brazil. From monthly samples of freshwater algae collected during five consecutive years (2002–2006) from the two lakes, the desmi ...
DOI:
10.1007/s10750-013-1458-0

34. Microalgae based biorefinery: evaluation of oil extraction methods in terms of efficiency, costs, toxicity and energy in lab-scale

Author:
Ángel Darío González-Delgado; Viatcheslav Kafarov
Source:
Revista Ion 2013 v.26 no.1 pp. 27-39
ISSN:
2145-8480
Subject:
Amphiprora; Closterium; Guinardia; Nannochloropsis; Navicula; biodiesel; biorefining; cyclohexanes; energy; energy crops; hexane; homogenization; metabolites; microalgae; microscopy; oils; solvents; topology; toxicity
Abstract:
... Several alternatives of microalgal metabolites extraction and transformation are being studied for achieving the total utilization of this energy crop of great interest worldwide. Microalgae oil extraction is a key stage in microalgal biodiesel production chains and their efficiency affects significantly the global process efficiency. In this study, a comparison of five oil extraction methods in l ...

35. Dynamic approaches of mixed species biofilm formation using modern technologies

Author:
Kim Doiron; Isabelle Linossier; Fabienne Fay; Julius Yong; Effendy Abd Wahid; Dimitre Hadjiev; Nathalie Bourgougnon
Source:
Marine environmental research 2012 v.78 no. pp. 40-47
ISSN:
0141-1136
Subject:
microscopy; Closterium; biofilm; Pseudoalteromonas; adhesion; Cylindrotheca; Amphora; bacteria
Abstract:
... Bacteria and diatoms exist in sessile communities and develop as biofilm on all surfaces in aqueous environments. The interaction between these microorganisms in biofilm was investigated with a bacterial genus Pseudoalteromonas sp. (strain 3J6) and two benthic diatoms Amphora coffeaeformis and Cylindrotheca closterium. Each biofilm was grown for 22 days. Images from the confocal microscopy show a ...
DOI:
10.1016/j.marenvres.2012.04.001
PubMed:
22542567

36. Zygospore formation between homothallic and heterothallic strains of Closterium

Author:
Yuki Tsuchikane; Miki Tsuchiya; František Hindák; Hisayoshi Nozaki; Hiroyuki Sekimoto
Source:
Sexual plant reproduction 2012 v.25 no.1 pp. 1-9
ISSN:
0934-0882
Subject:
Chlamydomonas; Closterium; coculture; embryophytes; phylogeny; sexual reproduction
Abstract:
... Zygospore formation in different strains of the Closterium peracerosum-strigosum-littorale complex was examined in this unicellular isogamous charophycean alga to shed light on gametic mating strains in this taxon, which is believed to share a close phylogenetic relationship with land plants. Zygospores typically form as a result of conjugation between mating-type plus (mt+) and mating-type minus ...
DOI:
10.1007/s00497-011-0174-z
PubMed:
21858438

37. +UVA treatment increases the degree of unsaturation in microalgal fatty acids and total carotenoid content in Nitzschia closterium (Bacillariophyceae) and Isochrysis zhangjiangensis (Chrysophyceae)

Author:
Jim Jun-hui Huang; Peter Chi-Keung Cheung
Source:
Food chemistry 2011 v.129 no.3 pp. 783-791
ISSN:
0308-8146
Subject:
Chrysophyceae; Closterium; Isochrysis; Nitzschia; carotenoids; eicosapentaenoic acid; environmental factors; fatty acid composition; functional foods; ingredients; linoleic acid; microalgae; photosynthetically active radiation
Abstract:
... The production of metabolites by microalgae is affected by environmental conditions in which they are living. The metabolic responses of two marine microalgae, Nitzschia closterium and Isochrysis zhangjiangensis, to a 3-day UVA-stress and 3-day UVA-recovery treatment were compared, based on their growth, fatty acid profiles and content of total carotenoids. When cultured under photosynthetically a ...
DOI:
10.1016/j.foodchem.2011.05.021
PubMed:
25212299

38. A Taxonomic Study of the Genus Closterium Nitzsch ex Ralfs (Zygnematophyceae, Streptophyta) in Temporary Ponds in the Burkina Faso, West Africa

Author:
Zongo Bilassé; Zongo Frédéric; Ouattara Allassane; Boussim Joseph I.
Source:
Cryptogamie 2011 v.32 no.3 pp. 255-270
ISSN:
1776-0984
Subject:
Closterium; formalin; ponds; species identification; wet season; Burkina Faso
Abstract:
... The number of Closterium species known from the Burkina Faso is small. The present study aims to contribute to the knowledge of species of this genus in Burkina Faso by means of an investigation of temporary ponds. The study of Closterium in ponds was conducted in the central and the eastern parts of the country, during the rainy seasons of 2007 and 2008. Samples were collected and preserved with ...
DOI:
10.7872/crya.v32.iss3.2011.255

39. Phytoplankton responses to changes in macrophyte density in a tropical artificial pond in Zaria, Nigeria

Author:
A M Chia; D N Iortsuun; B J Stephen; A E Ayobamire; Z Ladan
Source:
African journal of aquatic science 2011 v.36 no.1 pp. 35-46
ISSN:
1727-9364
Subject:
Closterium; Cyanoderma; Netrium; Nymphaea; Polygonum; Staurastrum; Ulothrix; alkaloids; anthraquinones; community structure; environmental factors; flavonoids; macrophytes; pH; phytoplankton; population dynamics; qualitative analysis; saponins; steroids; triterpenoids; Nigeria
Abstract:
... The response of phytoplankton population dynamics to changes in densities of Nymphaea lotus L. and Polygonum limbatum Meisn. was studied in an artificial pond in Zaria, Nigeria, from June to November 2007. Antagonistic effects of these macrophytes on Netrium sp., Staurastrum sp., Ulothrix sp., Marssionella sp. and Closterium sp. were collinear and clearly separated from other environmental effects ...
DOI:
10.2989/16085914.2011.559697

40. Stable Nuclear Transformation of the Closterium peracerosum–strigosum–littorale Complex

Author:
Jun Abe; Sachie Hori; Yuki Tsuchikane; Naoko Kitao; Misako Kato; Hiroyuki Sekimoto
Source:
Plant & cell physiology 2011 v.52 no.9 pp. 1676-1685
ISSN:
0032-0781
Subject:
Closterium; DNA; Zygnematales; cell physiology; early development; embryophytes; genes; genetic transformation; green fluorescent protein; monophyly; sex pheromones
Abstract:
... Although charophycean algae form a relevant monophyly with embryophytes and hence occupy a fundamental place in the development of Streptophyta, no tools for genetic transformation in these organisms have been developed. Here we present the first stable nuclear transformation system for the unicellular Zygnematales, the Closterium peracerosum–strigosum–littorale complex (C. psl complex), which is ...
DOI:
10.1093/pcp/pcr103

41. Characterization and Molecular Cloning of Conjugation-Regulating Sex Pheromones in Homothallic Closterium

Author:
Tsuchikane, Yuki; Kokubun, Yume; Sekimoto, Hiroyuki
Source:
Plant & cell physiology 2010 v.51 no.9 pp. 1515-1523
ISSN:
0032-0781
Subject:
Closterium; complementary DNA; culture media; filtration; gels; heterothallism; molecular cloning; molecular weight; proteins; selfing; sex pheromones; sisters; vegetative cells; yeasts
Abstract:
... Conjugation-regulating pheromones were analyzed in homothallic Closterium for the first time. Members of the Closterium peracerosum-strigosum-littorale complex are unicellular charophycean algae in which there are two modes of zygospore formation: heterothallism and homothallism. A homothallic strain of Closterium (designation, kodama20) forms selfing zygospores via the conjugation of two sister g ...
DOI:
10.1093/pcp/pcq110
PubMed:
20656896

42. Sexual processes and phylogenetic relationships of a homothallic strain in the closterium peracerosum-strigosum-littorale complex (zygnematales, charophyceae)

Author:
Tsuchikane, Yuki; Sato, Machiko; Ootaki, Tomoko; Kokubun, Yume; Nozaki, Hisayoshi; Ito, Motomi; Sekimoto, Hiroyuki
Source:
Journal of phycology 2010 v.46 no.2 pp. 278-284
ISSN:
0022-3646
Subject:
Charophyceae; Closterium; cell division; homothallic strains; introns; paddies; photography; phylogeny; protoplast fusion; protoplasts; ribosomal DNA; rice; zygospores
Abstract:
... Members of the Closterium peracerosum-strigosum-littorale (C. psl.) complex are unicellular charophycean algae in which there are two modes of zygospore formation, heterothallic and homothallic. A homothallic strain of Closterium (designation, kodama20) was isolated from a Japanese rice paddy field. Based on alignment of the 1506 group-I introns, which interrupt nuclear SSU rDNAs, homothallic koda ...
DOI:
10.1111/j.1529-8817.2010.00806.x

43. Short-term variability of water quality and its implications on phytoplankton production in a tropical estuary (Cochin backwaters—India)

Author:
N. V. Madhu; K. K. Balachandran; G. D. Martin; R. Jyothibabu; Shoji D. Thottathil; Maheswari Nair; T. Joseph; K. K. Kusum
Source:
Environmental monitoring and assessment 2010 v.170 no.1-4 pp. 287-300
ISSN:
0167-6369
Subject:
Closterium; Navicula; Nitzschia; Skeletonema costatum; Thalassiosira; ammonia; biomass; chlorophyll; environmental factors; estuaries; light intensity; monsoon season; nitrogen; nutrient content; phytoplankton; population growth; primary productivity; rivers; seasonal variation; silica; species diversity; time series analysis; turbidity; water quality; water temperature; India
Abstract:
... Changes in the phytoplankton biomass (chlorophyll a), production rate, and species composition were studied over two seasons using the time series measurements in the northern limb of the Cochin estuary in relation to the prevailing hydrological conditions. The present study showed the significant seasonal variation in water temperature (F=69.4, P<0.01), salinity (F=341.93, P<0.01), dissolved inor ...
DOI:
10.1007/s10661-009-1232-y

44. What do we know about charophyte (streptophyta) life cycles

Author:
Haig, David
Source:
Journal of phycology 2010 v.46 no.5 pp. 860-867
ISSN:
0022-3646
Subject:
embryophytes; Spirogyra; Closterium; haploidy; diploidy; germ cells; chromosomes; DNA; Sirogonium; fertilization (reproduction); zygote; Coleochaete; meiosis
Abstract:
... The charophyte algae are the closest living relatives of land plants. Their life cycles are usually characterized as haploid with zygotic meiosis. This conclusion, however, is based on a small number of observations and on theoretical assumptions about what kinds of life cycle are possible. Little is known about the life cycles of most charophytes, but unusual phenomena have been reported in compa ...
DOI:
10.1111/j.1529-8817.2010.00874.x

45. Development of a Toxicity Identification Evaluation Protocol Using Chlorophyll-a Fluorescence in a Marine Microalga

Author:
Strom, D.; Ralph, P. J.; Stauber, J. L.
Source:
Archives of environmental contamination and toxicology 2009 v.56 no.1 pp. 30-38
ISSN:
0090-4341
Subject:
Closterium; Isochrysis galbana; Nitzschia; bioassays; cell division; chemical composition; developmental toxicity; effluents; fluorescence; herbicides; microalgae
Abstract:
... Growth inhibition bioassays with the microalga Nitzschia closterium have recently been applied in marine Toxicity Identification Evaluation (TIE) testing. However, the 48-h test duration can result in substantial loss of toxicants over time, which might lead to an underestimation of the sample toxicity. Although shorter-term microalgal bioassays can minimize such losses, there are few bioassays av ...
DOI:
10.1007/s00244-008-9174-x
PubMed:
18449466

46. Peroxisomal targeting signals in green algae

Author:
Shinozaki, Akiko; Sato, Nagisa; Hayashi, Yasuko
Source:
Protoplasma 2009 v.235 no.1-4 pp. 57-66
ISSN:
0033-183X
Subject:
Cauliflower mosaic virus; Chlamydomonas reinhardtii; Closterium; Rhodophyta; amino acid sequences; cells; databases; enzymes; evolution; genes; green fluorescent protein; mammals; peptides; peroxisomes; promoter regions; yeasts
Abstract:
... Peroxisomal enzymatic proteins contain targeting signals (PTS) to enable their import into peroxisomes. These targeting signals have been identified as PTS1 and PTS2 in mammalian, yeast, and higher plant cells; however, no PTS2-like amino acid sequences have been observed in enzymes from the genome database of Cyanidiochyzon merolae (Bangiophyceae), a primitive red algae. In studies on the evoluti ...
DOI:
10.1007/s00709-009-0031-1
PubMed:
19214701

47. Potential phytoplankton indicator species for monitoring Baltic coastal waters in the summer period

Author:
Jaanus, Andres; Toming, Kaire; Hällfors, Seija; Kaljurand, Kaire; Lips, Inga
Source:
Hydrobiologia 2009 v.629 no.1 pp. 157-168
ISSN:
0018-8158
Subject:
Aphanizomenon; Closterium; Cyclotella; Cylindrotheca; Nodularia spumigena; Skeletonema costatum; biomass; coastal water; community structure; dissolved inorganic nitrogen; eutrophication; indicator species; monitoring; nutrient content; phosphorus; phytoplankton; ships; summer; time series analysis; Gulf of Finland
Abstract:
... There are very few time series documenting clear trends of change in the biomass of total phytoplankton or single taxa that coincide with trends of increasing nutrient concentrations. Weekly or biweekly monitoring since 1997 on a cross section of the central Gulf of Finland (NE Baltic Sea) with similar climatic and hydrographic conditions, but different nutrient levels, provided a uniform dataset. ...
DOI:
10.1007/s10750-009-9768-y

48. Effect of antibiotics on cell proliferation in the Closterium peracerosum-strigosum-littorale complex (Charophyceae, Chlorophyta)

Author:
Jun Abe; Kaori Sakayori; Hiroyuki Sekimoto
Source:
Biologia 2008 v.63 no.6 pp. 936-940
ISSN:
1336-9563
Subject:
Charophyceae; Chlorophyta; algae; cell proliferation; cultured cells; genetic markers; hygromycin B; kanamycin; minimum inhibitory concentration
Abstract:
... The effects of several antibiotics on the proliferation of cells of the Closterium peracerosum-strigosum-littorale complex, a unicellular charophycean alga, were examined. When cells were cultured on solid medium containing hygromycin B and phleomycin the proliferation of cells was inhibited at low concentrations of these antibiotics, with a minimum inhibitory concentration of 5.0 and 0.2 µg/mL, r ...
DOI:
10.2478/s11756-008-0145-5

49. Reproductive isolation by sex pheromones in the closterium peracerosum-strigosum-littorale complex (zygnematales, charophyceae)

Author:
Tsuchikane, Yuki; Ito, Motomi; Sekimoto, Hiroyuki
Source:
Journal of phycology 2008 v.44 no.5 pp. 1197-1203
ISSN:
0022-3646
Subject:
Charophyceae; Closterium; sex pheromones; phylogeny; cell division; amino acid sequences; zygote; heterothallic strains; reproductive isolation; introns
Abstract:
... The Closterium peracerosum-strigosum-littorale (C. psl.) complex consists of unicellular algae and is known to be composed of several reproductively isolated mating groups of heterothallic strains. Group I-E is completely isolated from mating groups II-A and II-B, groups II-A and II-B are partially isolated from each other, and only mating-type plus (mt⁺) cells of group II-A and mating-type minus ...
DOI:
10.1111/j.1529-8817.2008.00577.x

50. Application of desmid diversity in assessing the water quality of 12 freshwater resources in Thailand

Author:
Ngearnpat, N.; Peerapornpisal, Y.
Source:
Journal of applied phycology 2007 v.19 no.6 pp. 667-674
ISSN:
0921-8971
Subject:
Actinotaenium; Closterium; Cosmarium; Cosmocladium; Desmidium; Euastrum; Gonatozygon; Hyalotheca; Micrasterias; Netrium; Pleurotaenium; Spirotaenia; Spondylosium; Staurastrum; Staurodesmus; Teilingia; Xanthidium; freshwater; trophic relationships; water quality; water resources; Thailand
Abstract:
... Desmids from 12 freshwater resources in the northern part of Thailand were investigated during 2002 to 2003. A total of 91 taxa were found. They belonged to 17 genera: Actinotaenium, Spirotaenia, Netrium, Gonatozygon, Pleurotaenium, Closterium, Euastrum, Micrasterias, Cosmarium, Cosmocladium, Stuarastrum, Staurodesmus, Xanthidium, Teilingia, Spondylosium, Hyalotheca and Desmidium. The water qualit ...
DOI:
10.1007/s10811-007-9191-6

51. Induction of sex pheromone secretion and observations of the secretory pathway in the Closterium peracerosum-strigosum-littorale complex

Author:
Imaizumi, M.; Sekimoto, H.; Noguchi, T.
Source:
Plant science 2007 v.173 no.2 pp. 206-212
ISSN:
0168-9452
Subject:
Closterium; plant hormones; algae; ultrastructure; immunocytochemistry
DOI:
10.1016/j.plantsci.2007.05.002

52. Impact of elevated UV-B radiation on photosynthetic electron transport, primary productivity and carbon allocation in estuarine epipelic diatoms

Author:
Waring, Jen; Underwood, Graham J.C.; Baker, Neil R.
Source:
Plant, cell and environment 2006 v.29 no.4 pp. 521-534
ISSN:
0140-7791
Subject:
Amphora; Closterium; Cylindrotheca; Navicula; Nitzschia; biofilm; carbon; electron transfer; energy; estuaries; exposure duration; photochemistry; photosystem II; pigments; polysaccharides; primary productivity; ultraviolet radiation
Abstract:
... Epipelic diatoms are important components of microphytobenthic biofilms. Cultures of four diatom species (Amphora coffeaeformis, Cylindrotheca closterium, Navicula perminuta and Nitzschia epithemioides) and assemblages of mixed diatom species collected from an estuary were exposed to elevated levels of ultraviolet-B (UV-B) radiation. Short exposures to UV-B resulted in decreases in photosystem II ...
DOI:
10.1111/j.1365-3040.2005.01429.x
PubMed:
17080604

53. Productivity and Distribution of Epipellic Microalgae Along Salinity Gradients in Mangrove Swamp of the Qua Iboe Estuary (NIGERIA)

Author:
J. P. Essien; R. M. Ubom; S. P. Antai
Source:
Environmental monitoring and assessment 2006 v.121 no.1-3 pp. 65-75
ISSN:
0167-6369
Subject:
Closterium; Oscillatoria; dry season; estuaries; freshwater; mangrove swamps; microalgae; rain; salinity; streams; urban runoff; wet season; Nigeria
Abstract:
... Based on spatial variation in tidal mud salinity, direct gradient analysis procedures were adopted to relate the productivity and distribution of epipellic microalgae along salinity gradients in mangrove swamp of the Qua Iboe Estuary. Variations in mud salinities were due to distance from the coast, tidal incursions and freshwater input. The dilution effect of fresh water input from rainfall, urba ...
DOI:
10.1007/s10661-005-9107-3

54. A Sex Pheromone, Protoplast Release-inducing Protein (PR-IP) Inducer, Induces Sexual Cell Division and Production of PR-IP in Closterium

Author:
Tsuchikane, Yuki; Fujii, Tadashi; Ito, Motomi; Sekimoto, Hiroyuki
Source:
Plant & cell physiology 2005 v.46 no.9 pp. 1472-1476
ISSN:
0032-0781
Subject:
Closterium; plant biochemistry; algae; recombinant fusion proteins; cell division; plant physiology; plant proteins
Abstract:
... The sex pheromone protoplast release-inducing protein (PR-IP) inducer and a sexual cell division-inducing pheromone-minus (SCD-IP-minus) that mediates the sexual reproduction of the heterothallic Closterium peracerosum-strigosum-littorale (C. psl) complex were investigated in this study. Recombinant PR-IP inducer produced by yeast cells was prepared and assayed for production of PR-IP and inductio ...
DOI:
10.1093/pcp/pci158
PubMed:
15970600

55. Molecular evidence of parallel origins of two different parthenosporic lineages directly from heterothallic lineages in the Closterium moniliferum–ehrenbergii (Charophyceae, Chlorophyta) species complex

Author:
Dian Hendrayanti; Takashi Denboh; Terunobu Ichimura; Taizo Motomura
Source:
Phycologia 2004 v.43 no.6 pp. 727-736
ISSN:
2330-2968
Subject:
Charophyceae; Chlorophyta; Closterium; Ryukyu Archipelago; fluorescence microscopy; germination; introns; meiosis; monophyly; ribosomal DNA; statistical analysis; zygospores; Vietnam
Abstract:
... Culture strains of the Closterium moniliferum-ehrenbergii species complex were classified on the basis of three types of dormant spores: zygospores formed by homothallic and heterothallic conjugation and parthenospores formed without conjugation. Two parthenosporic strains of C. moniliferum from Hiroshima, Japan, and Ho Chi Minh, Vietnam, and two parthenosporic strains of C. ehrenbergii from Okina ...
DOI:
10.2216/i0031-8884-43-6-727.1

56. Secretion of iron-complexing ligands from Closterium aciculare (Charophyceae, Chlorophyta) under iron-deficient conditions

Author:
Kanako Naito; Mitsuko Suzuki; Masakazu Matsui; Ichiro Imai
Source:
Phycologia 2004 v.43 no.5 pp. 632-634
ISSN:
2330-2968
Subject:
Charophyceae; Chlorophyta; Closterium; freshwater; iron; ligands; microalgae; prokaryotic cells; secretion; siderophores
Abstract:
... Siderophores, ferric iron-specific ligands, are produced by many species of prokaryotes, fungi and higher plants under iron-limited conditions. We report the possibility of siderophore production by a freshwater eukaryotic microalga Closterium aciculare under iron-deficient conditions. Closterium aciculare secreted a substance that is reactive in the chrome azurol S (CAS) assay in an iron-deficien ...
DOI:
10.2216/i0031-8884-43-5-632.1

57. Microbial agents Bacillus thuringiensis ssp. iraelensis and Bacillus sphaericus suppress eutrophication, enhance water quality, and control mosquitoes in microcosms

Author:
Su, T.; Mulla, M.S.
Source:
Environmental entomology 1999 v.28 no.4 pp. 761-767
ISSN:
0046-225X
Subject:
Chlorella; Culex; Closterium; primary productivity; water quality; granules; algae; biological control agents; turbidity; aquatic environment; plant density; Bacillus sphaericus; Bacillus thuringiensis; eutrophication; biomass production; dissolved oxygen; biological control
Abstract:
... Bacillus thuringiensis ssp. israelensis de Barjac (Bti) and Bacillus sphaericus Neide are promising microbial mosquito larvicides currently employed in mosquito control programs. During the screening and evaluation of new formulations of these control agents, it was noted that productivity of some algal species was noticeably suppressed, and that certain water quality parameters were enhanced by t ...
DOI:
10.1093/ee/28.4.761

58. Perturbation of the secretory network inClosterium acerosum by Na+-selective ionophores

Author:
D. S. Domozych
Source:
Protoplasma 1999 v.206 no.1-3 pp. 41-56
ISSN:
0033-183X
Subject:
Closterium; Golgi apparatus; actin; cytoplasmic streaming; dissociation; endomembrane system; microfilaments; monensin; plasma membrane; polyclonal antibodies; sodium; tetrodotoxin; vacuoles
Abstract:
... Closterium acerosum possesses a well-defined, mucilage-secretory mechanism consisting of up to 100 Golgi bodies, two distinct vacuolar networks, and an active cytoplasmic-streaming network located in the cell periphery. Five different sodium-affecting agents were applied to actively secreting cells in order to determine the role, if any, of Na⁺ on this secretory mechanism. Significant effects to t ...
DOI:
10.1007/BF01279252