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You searched for: Publication year rev 7991-2009 Remove constraint Publication year rev: 7991-2009 Subject Microcystis aeruginosa Remove constraint Subject: Microcystis aeruginosa
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1. Acclimation to and recovery from cadmium and zinc exposure by a freshwater cyanobacterium, Microcystis aeruginosa

Author:
Zeng, Jin; Yang, Liuyan; Wang, Wen-Xiong
Source:
Aquatic toxicology 2009 v.93 no.1 pp. 1-10
ISSN:
0166-445X
Subject:
water pollution; cadmium; zinc; Microcystis aeruginosa; acclimation; metal tolerance; toxicity; uptake mechanisms; subcellular fractions; bioaccumulation
Abstract:
... To understand the metal tolerance of a bloom-forming cyanobacterium, Microcystis aeruginosa, we investigated its acclimation to and recovery from cadmium (Cd) and zinc (Zn) exposure. The intracellular Cd and Zn (intra-Cd and intra-Zn) quotas increased upon acclimation to increased metal concentrations and were reduced following 1-day or 5-day recovery. Different acclimation to varying metal concen ...
DOI:
10.1016/j.aquatox.2009.02.013
PubMed:
19328562

2. Analysis of dissolved microcystins in surface water samples from Kovada Lake, Turkey

Author:
Gurbuz, Fatma; Metcalf, James S.; Karahan, Aynur Gul; Codd, Geoffrey A.
Source:
Science of the total environment 2009 v.407 no.13 pp. 4038-4046
ISSN:
0048-9697
Subject:
Microcystis aeruginosa; Phormidium; Planktothrix; Synechococcus; World Health Organization; cross reaction; drinking water; enzyme-linked immunosorbent assay; health hazards; high performance liquid chromatography; lakes; microcystins; quantitative analysis; surface water; Turkey (country)
Abstract:
... Dissolved (extracellular) microcystin (MC) concentrations were determined at 3 sampling stations on Lake Kovada, Turkey. The dominant species of cyanobacteria found in August and September of 2006 were Microcystis aeruginosa, Synechococcus sp., Phormidium limosum, Phormidium formosa and Planktothrix limnetica. MC concentrations in water were measured by ELISA and MC variants were examined by HPLC- ...
DOI:
10.1016/j.scitotenv.2009.02.039
PubMed:
19395066

3. Cadmium and zinc uptake and toxicity in two strains of Microcystis aeruginosa predicted by metal free ion activity and intracellular concentration

Author:
Zeng, Jin; Yang, Liuyan; Wang, Wen-Xiong
Source:
Aquatic toxicology 2009 v.91 no.3 pp. 212-220
ISSN:
0166-445X
Subject:
Microcystis aeruginosa; microalgae; cadmium; zinc; heavy metals; water pollution; uptake mechanisms; bioaccumulation; toxicity; prediction; models
Abstract:
... Microcystis aeruginosa is an important cyanobacteria widely found in numerous freshwater lakes. In this study, we examined the uptake and toxic effects of cadmium (Cd) and zinc (Zn) in non-toxic (Ma 469) and toxic (Ma 905) strains of Microcystis based on the metal free ion and cellular concentrations. We compared their uptake rates, pulse-amplitude-modulated parameters (maximum photosystem II quan ...
DOI:
10.1016/j.aquatox.2008.11.004
PubMed:
19100632

4. Changes in the nutritional parameters of muscles of the common carp (Cyprinus carpio) and the silver carp (Hypophthalmichthys molitrix) following environmental exposure to cyanobacterial water bloom

Author:
Mares, Jan; Palikova, Miroslava; Kopp, Radovan; Navratil, Stanislav; Pikula, Jiri
Source:
Aquaculture research 2009 v.40 no.2 pp. 148-156
ISSN:
1355-557X
Subject:
Cyprinus carpio; Hypophthalmichthys molitrix; Microcystis aeruginosa; Microcystis ichthyoblabe; amino acids; biomass; drinking water; dry matter content; environmental exposure; fatty acid composition; freshwater fish; models; muscles; proteins
Abstract:
... The present study evaluated the effect of naturally developing cyanobacteria on the composition of muscles of two commercially important freshwater fish species. Fish were exposed to cyanobacterial biomass including Microcystis aeruginosa and Microcystis ichthyoblabe for 4 weeks. Then, they were transferred to dechlorinated potable water without any cyanobacteria for another 4-week period, thus mo ...
DOI:
10.1111/j.1365-2109.2008.02074.x

5. Chemical characterization of the aqueous algistatic fraction of barley straw (Hordeum vulgare) inhibiting Microcystis aeruginosa

Author:
Waybright, Timothy J.; Terlizzi, Daniel E.; Ferrier, M. Drew
Source:
Journal of applied phycology 2009 v.21 no.3 pp. 333-340
ISSN:
0921-8971
Subject:
Hordeum vulgare; Microcystis aeruginosa; algal blooms; barley straw; bioassays; chlorophyll; farmers; filters; fluorescence; fractionation; freshwater; high performance liquid chromatography; horticulturists; hydrolysis; molecular weight; monitoring; polyamides; polyphenols; toxicity
Abstract:
... The algistatic properties of aqueous barley straw (Hordeum vulgare) extracts have been observed in laboratory studies and in situ. This reported algistatic property has been used by farmers and horticulturists to control algal blooms in various systems and has become standard practice in some areas. However, both inhibition and stimulation of algal growth in freshwater and marine species have been ...
DOI:
10.1007/s10811-008-9373-x

6. Detection of Planktothrix rubescens (Cyanobacteria) associated with microcystin production in a freshwater reservoir

Author:
Paulino, Sérgio; Valério, Elisabete; Faria, Natália; Fastner, Jutta; Welker, Martin; Tenreiro, Rogério; Pereira, Paulo
Source:
Hydrobiologia 2009 v.621 no.1 pp. 207-211
ISSN:
0018-8158
Subject:
Microcystis aeruginosa; Planktothrix rubescens; freshwater; high performance liquid chromatography; microcystins; nucleotide sequences; ribosomal RNA; risk management; sequence analysis; surface water; Portugal
Abstract:
... So far, the presence of microcystins in Portuguese freshwater resources has always been attributed to the bloom-forming cyanobacteria Microcystis aeruginosa. In 2005, however, microcystins were detected at the Beliche reservoir (Algarve, South Portugal), following the development of a bloom dominated by Planktothrix rubescens. The identity of the causative organism was confirmed by combining both ...
DOI:
10.1007/s10750-008-9640-5

7. Effect of Cl− on photosynthetic bicarbonate uptake in two cyanobacteria Microcystis aeruginosa and Synechocystis PCC6803

Author:
Zhen Chen; HuiMin Cheng; XiongWen Chen
Source:
Chinese science bulletin 2009 v.54 no.7 pp. 1197-1203
ISSN:
1001-6538
Subject:
Microcystis aeruginosa; Synechocystis sp. PCC 6714; Synechocystis sp. PCC 6803; algae; bicarbonates; carbon; carbon dioxide; chlorides; chlorophyll; fluorescence; photosynthesis; sodium
Abstract:
... Photosynthetic inorganic carbon utilization was investigated in two cyanobacteria Microcystis aeruginosa and Synechocystis PCC6803 grown in standing culture. Photosynthetic rates for the two algae reached about 10 times the theoretical CO₂ supply rate at low dissolved inorganic carbon (DIC) of 100 μmol/L, and the rates were unaffected by the addition of 20 mmol/L Na⁺, indicating that the two algae ...
DOI:
10.1007/s11434-009-0148-9

8. Effect of selected marine and freshwater microalgae on development and survival of the mosquito Aedes aegypti

Author:
Rey, Jorge R.; Hargraves, Paul E.; O'Connell, Sheila M.
Source:
Aquatic ecology 2009 v.43 no.4 pp. 987-997
ISSN:
1386-2588
Subject:
freshwater; microalgae; rivers; medical entomology; Aedes aegypti; allelopathy; universities; toxicity; Microcystis aeruginosa; insect larvae; mortality; aquatic plant culture; Texas; Florida
Abstract:
... We isolated and identified strains of marine and freshwater planktonic and benthic microalgae from the vicinity of Indian River County, Florida (≈27.5°N, 80.34°W), cultivated them in batch culture, and examined their allelopathic activity against mosquito larvae. Additional algal material was obtained from Syracuse University and the University of Texas—Austin Algal Culture Collection. Mosquito la ...
DOI:
10.1007/s10452-009-9232-0

9. Effects of a Novel Allelochemical Ethyl 2-Methyl Acetoacetate (EMA) on the Ultrastructure and Pigment Composition of Cyanobacterium Microcystis aeruginosa

Author:
Hong, Yu; Huang, Jing-Jing; Hu, Hong-Ying
Source:
Bulletin of environmental contamination and toxicology 2009 v.83 no.4 pp. 502-508
ISSN:
0007-4861
Subject:
granules; exposure duration; lipid bodies; vacuoles; photosynthesis; carotenoids; Microcystis aeruginosa; chlorophyll; ultrastructure; pigments
Abstract:
... Allelochemical ethyl 2-methyl acetoacetate (EMA) can significantly inhibit the growth of bloom-forming Microcystis aeruginosa. In order to assess the implication of the damage of EMA on the algal photosynthetic apparatus, the effects of EMA on the algal ultrastructure and pigment composition were investigated. At initial exposure time to EMA (0-40 h), algal allophycocyanin, phycoerythrin and carot ...
DOI:
10.1007/s00128-009-9795-4
PubMed:
19557299

10. Effects of arsenate on the growth and microcystin production of Microcystis aeruginosa isolated from Taiwan as influenced by extracellular phosphate

Author:
Gong, Yan; Chou, Hong-Nong; Tu, Chi-dao; Liu, Xi; Liu, Jiantong; Song, Lirong
Source:
Journal of applied phycology 2009 v.21 no.2 pp. 225-231
ISSN:
0921-8971
Subject:
risk; microcystins; biosynthesis; aquaculture; arsenic; ponds; pollution; arsenates; phosphates; eutrophication; toxicity; Microcystis aeruginosa; food chain; hormesis; excretion; starvation; Taiwan
Abstract:
... Arsenic pollution and eutrophication are both prominent issues in the aquaculture ponds of Taiwan. It is important to study the effects of arsenic on algal growth and toxin production in order to assess the ecological risk of arsenic pollution, or at least to understand naturally occurring ponds. The sensitivity of algae to arsenate has often been linked to the structural similarities between arse ...
DOI:
10.1007/s10811-008-9353-1

11. Effects of bacillamide and newly synthesized derivatives on the growth of cyanobacteria and microalgae cultures

Author:
Churro, C.; Alverca, E.; Sam-Bento, F.; Paulino, S.; Figueira, V. C.; Bento, A. J.; Prabhakar, S.; Lobo, A. M.; Calado, A. J.; Pereira, P.
Source:
Journal of applied phycology 2009 v.21 no.4 pp. 429-442
ISSN:
0921-8971
Subject:
Anabaena circinalis; Anabaenopsis circularis; Ankistrodesmus falcatus; Aphanizomenon gracile; Bacillariophyceae; Leptolyngbya; Microcystis aeruginosa; Nodularia spumigena; Planktothrix rubescens; Scenedesmus obliquus; algicides; bioassays; cell biology; microalgae; regression analysis; toxicity; transmission electron microscopy; ultrastructure
Abstract:
... The antialgal activity of newly synthesized bacillamides against several cyanobacteria and microalgae isolates was screened using a rapid 96-well microplate bioassay. Cultures were exposed to serial dilutions of each bacillamide derivative (0-160 μg mL⁻¹) in the microplate wells and daily optical measurements were used to estimate growth over a 216 h period. Inhibition values (%) were calculated f ...
DOI:
10.1007/s10811-008-9388-3

12. Effects of nitrate on intracellular nitrite and growth of Microcystis aeruginosa

Author:
Chen, Weimin; Zhang, Qingmin; Dai, Shugui
Source:
Journal of applied phycology 2009 v.21 no.6 pp. 701-706
ISSN:
0921-8971
Subject:
carbon dioxide; phytoplankton; nitrate reductase; nitrogen; photosynthesis; Microcystis aeruginosa; nitrites; nitrates
Abstract:
... Although nitrate is a macronutrient and can serve as good nitrogen source for many species of phytoplankton, high nitrate concentrations do not benefit the growth of phytoplankton. We hypothesise that algae cultured under high nitrate concentrations can accumulate intracellular nitrite, which is produced by nitrate reductase (NR) and can inhibit the growth of algae. To assess the validity of this ...
DOI:
10.1007/s10811-009-9405-1

13. Electrochemical immunoassay using quantum dot/antibody probe for identification of cyanobacterial hepatotoxin microcystin-LR

Author:
Yu, Hye-Weon; Lee, Jinwook; Kim, Sungyoun; Nguyen, Giang Huong; Kim, In S.
Source:
Analytical and bioanalytical chemistry 2009 v.394 no.8 pp. 2173-2181
ISSN:
1618-2642
Subject:
Microcystis aeruginosa; antibodies; cadmium; detection limit; drinking water; electrochemistry; hepatotoxins; humans; immunoassays; ions; microcystin-LR; qualitative analysis; quantum dots
Abstract:
... The presence of cyanobacterial hepatotoxins such as microcystin-LR poses health threats to humans due to their potential for causing severe physiological effects when contaminated drinking water is ingested. Here, the electrochemical detection of microcystin-LR is explored using a quantum dot/antibody (QD/Ab) probe for nanoparticle-based amplification and direct electrochemical transduction. The i ...
DOI:
10.1007/s00216-009-2910-x

14. Extracellular enzymes of the microcystis aeruginosa pcc 7813 strain are inhibited in the presence of hydroquinone and pyrogallol, allelochemicals produced by aquatic plants

Author:
Dziga, Dariusz; Goral, Tomasz; Bialczyk, Jan; Lechowski, Zbigniew
Source:
Journal of phycology 2009 v.45 no.6 pp. 1299-1303
ISSN:
0022-3646
Subject:
Microcystis aeruginosa; alkaline phosphatase; allelochemicals; aquatic plants; beta-glucosidase; enzyme inhibition; freshwater; hydroquinone; leucyl aminopeptidase; polyphenols; pyrogallol; toxicity
Abstract:
... Several cyanobacterial species have a high potential to dominate in marine environments and freshwater reservoirs, and the ecological and physiological reasons for this phenomenon are not understood comprehensively. In this study, the ability of a Microcystis aeruginosa Kütz. strain to produce free dissolved enzymes was documented. We have observed that this highly toxic strain releases alkaline p ...
DOI:
10.1111/j.1529-8817.2009.00742.x

15. Fate and effects of octylphenol in a Microcystis aeruginosa culture medium

Author:
Baptista, Mafalda S.; Stoichev, Teodor; Basto, M. Clara P.; Vasconcelos, Vitor M.; Vasconcelos, M.Teresa S.D.
Source:
Aquatic toxicology 2009 v.92 no.2 pp. 59-64
ISSN:
0166-445X
Subject:
water pollution; plant exudates; phytoplankton; endocrine-disrupting chemicals; in vitro culture; xenobiotics; phenols; toxicity testing; microbial growth; hydrolysis; extraction; Microcystis aeruginosa; Portugal
Abstract:
... Octylphenol (OP) is a xenobiotic with endocrine disrupting properties found in freshwaters worldwide. Its effects have been studied in organisms with nuclear receptors but effects on phytoplankton communities are poorly characterized, despite the fact that these organisms are constantly exposed to this compound. For this reason fate and effects of OP in the cyanobacterium Microcystis aeruginosa we ...
DOI:
10.1016/j.aquatox.2008.12.005

16. Feedback between zebra mussel selective feeding and algal composition affects mussel condition: did the regime changer pay a price for its success?

Author:
VANDERPLOEG, HENRY A.; JOHENGEN, THOMAS H.; LIEBIG, JAMES R.
Source:
Freshwater biology 2009 v.54 no.1 pp. 47-63
ISSN:
0046-5070
Subject:
mussels; grazing; seasonal variation; summer; Microcystis aeruginosa; digestive system; correlation; microcystins; reproduction; food quality; feces; poisoning; phytoplankton; autumn; biomass; adverse effects; prices; spring; chlorophyll; Lake Huron; Lake Erie
Abstract:
... 1. We investigated the role of algal composition on pumping, clearance, assimilation, pseudofaeces and faeces production, feeding time budgets, and condition of zebra mussels from spring to autumn at two sites in Saginaw Bay (Lake Huron) and one site in western Lake Erie. Size-fractioned chlorophyll was used to distinguish between feeding on small (<53 μm) and large (>53 μm) size fractions, and mu ...
DOI:
10.1111/j.1365-2427.2008.02091.x

17. Feeding characteristics of a golden alga (Poterioochromonas sp.) grazing on toxic cyanobacterium Microcystis aeruginosa

Author:
Zhang, Xue; Hu, Hong-Ying; Men, Yu-Jie; Yang, Jia; Christoffersen, Kirsten
Source:
Water research 2009 v.43 no.12 pp. 2953-2960
ISSN:
0043-1354
Subject:
Ochromonadaceae; algal blooms; Microcystis aeruginosa; microcystins; flow cytometry; population density; light intensity; trophic relationships
DOI:
10.1016/j.watres.2009.04.003
PubMed:
19476966

18. Gramine-induced growth inhibition, oxidative damage and antioxidant responses in freshwater cyanobacterium Microcystis aeruginosa

Author:
Hong, Yu; Hu, Hong-Ying; Xie, Xing; Sakoda, Akiyoshi; Sagehashi, Masaki; Li, Feng-Min
Source:
Aquatic toxicology 2009 v.91 no.3 pp. 262-269
ISSN:
0166-445X
Subject:
algal blooms; phytotoxicity; gramine; allelochemicals; reactive oxygen species; lipid peroxidation; microbial growth; oxidation; Microcystis aeruginosa; enzyme activity; oxidative stress; algicides
Abstract:
... In recent years, the exploration and development of the effective methods of treatment and prevention to algal blooms, especially Microcystis aeruginosa blooms has been an important issue in the field of water environment protection. Allelochemicals (natural plant toxins) are considered promising sources of algicides to control algal blooms. The objective of this study is to determine the inhibito ...
DOI:
10.1016/j.aquatox.2008.11.014
PubMed:
19131120

19. Grazing on toxic and non-toxic Microcystis aeruginosa PCC7820 by Unio douglasiae and Corbicula fluminea

Author:
Liu, Ying; Xie, Ping; Wu, Xiao-Ping
Source:
Limnology 2009 v.10 no.1 pp. 1-5
ISSN:
1439-8621
Subject:
Corbicula fluminea; Microcystis aeruginosa; Scenedesmus obliquus; blended foods; excretion; feces; grazing; mussels; phytoplankton; toxicity
Abstract:
... To explore the potential grazing effects of mussels on Microcystis aeruginosa, a common bloom-forming phytoplankton, Unio douglasiae and Corbicula fluminea were fed with Scenedesmus obliquus, toxic and non-toxic strains of Microcystis aeruginosa as single food and as mixtures in the laboratory. When fed with single foods, U. douglasiae has similar clearance rates on the three algae populations, wh ...
DOI:
10.1007/s10201-008-0255-3

20. Life history responses of Daphnia magna feeding on toxic Microcystis aeruginosa alone and mixed with a mixotrophic Poterioochromonas species

Author:
Zhang, Xue; Warming, Trine Perlt; Hu, Hong-Ying; Christoffersen, Kirsten Seestern
Source:
Water research 2009 v.43 no.20 pp. 5053-5062
ISSN:
0043-1354
Subject:
life history; Daphnia magna; aquatic arthropods; Microcystis aeruginosa; bioaccumulation; toxicity testing; acute toxicity; cyanobacterial toxins; grazing; food webs; laboratories
DOI:
10.1016/j.watres.2009.08.022
PubMed:
19748652

21. Localization of microcystin synthetase genes in colonies of the cyanobacterium microcystis using fluorescence in situ hybridization

Author:
Metcalf, James S.; Reilly, Marianne; Young, Fiona M.; Codd, Geoffrey A.
Source:
Journal of phycology 2009 v.45 no.6 pp. 1400-1404
ISSN:
0022-3646
Subject:
DNA; Microcystis aeruginosa; drinking water; enzyme-linked immunosorbent assay; fluorescence; fluorescence in situ hybridization; genes; hepatotoxins; hybridization; microcystins; polymerase chain reaction; water management
Abstract:
... To better understand the production of microcystins (MCs) in Microcystis colonies, fluorescence in situ hybridization (FISH) methods were developed to detect DNA involved in the synthesis of these cyanobacterial hepatotoxins. Using colonies of Microcystis aeruginosa (Kütz.) Kütz. isolated from environmental blooms of cyanobacteria and from a colony-forming, MC-producing laboratory strain of Microc ...
DOI:
10.1111/j.1529-8817.2009.00750.x

22. Microcystin Production by Microcystis aeruginosa Exposed to Phytoplanktivorous and Omnivorous Fish at Different Kairomone Concentrations

Author:
Ha, Kyong; Takamura, Noriko; Jang, Min-Ho
Source:
Bulletin of environmental contamination and toxicology 2009 v.83 no.5 pp. 761-765
ISSN:
0007-4861
Subject:
Carassius gibelio; Hypophthalmichthys molitrix; Microcystis aeruginosa; fish; kairomones
Abstract:
... We investigated microcystin (MC) production by three Microcystis aeruginosa strains in response to different kairomone concentrations (indirect exposure: 0%, 10%, 25%, and 50%) of Hypophthalmichthys molitrix and Carassius gibelio langsdorfi. The MC production was significantly different among control and three kairomone treatment levels. MC production was higher with increasing concentration of ka ...
DOI:
10.1007/s00128-009-9841-2
PubMed:
19669611

23. Microcystin-LR toxicity on dominant copepods Eurytemora affinis and Pseudodiaptomus forbesi of the upper San Francisco Estuary

Author:
Ger, Kemal A.; Teh, Swee J.; Goldman, Charles R.
Source:
Science of the total environment 2009 v.407 no.17 pp. 4852-4857
ISSN:
0048-9697
Subject:
Eurytemora affinis; Microcystis aeruginosa; acute toxicity; dietary exposure; estuaries; fish; fish feeds; lethal concentration 50; long term effects; microcystin-LR; risk; zooplankton
Abstract:
... This study investigates the toxicity and post-exposure effects of dissolved microcystin (MC-LR) on the dominant copepods of the upper San Francisco Estuary (SFE), where blooms of the toxic cyanobacteria Microcystis aeruginosa coincide with record low levels in the abundance of pelagic organisms including phytoplankton, zooplankton, and fish. The potential negative impact of Microcystis on the cope ...
DOI:
10.1016/j.scitotenv.2009.05.043
PubMed:
19539351

24. Micropeptins from the Freshwater Cyanobacterium Microcystis aeruginosa (NIES-100)

Author:
Kisugi, Takaya; Okino, Tatsufumi
Source:
Journal of natural products 2009 v.72 no.4 pp. 777-781
ISSN:
0163-3864
Subject:
freshwater; aquatic organisms; chymotrypsin; depsipeptides; proteinase inhibitors; Microcystis aeruginosa; enzyme inhibition; chemical structure
DOI:
10.1021/np800631t
PubMed:
19260658

25. Molecular detection of uncultured cyanobacteria and aminotransferase domains for cyanotoxin production in sediments of different Kenyan lakes

Author:
Dadheech, Pawan K.; Krienitz, Lothar; Kotut, Kiplagat; Ballot, Andreas; Casper, Peter
Source:
FEMS microbiology ecology 2009 v.68 no.3 pp. 340-350
ISSN:
0168-6496
Subject:
Anabaena; Anabaenopsis; Arthrospira; Chroococcidiopsis; Microcystis aeruginosa; cyanobacterial toxins; denaturing gradient gel electrophoresis; freshwater; genes; genetic markers; lakes; nucleotide sequences; phylotype; plankton; polymerase chain reaction; ribosomal RNA; sediments; transaminases; Kenya
Abstract:
... PCR-based denaturing gradient gel electrophoresis (DGGE) analysis of 16S rRNA gene fragments was used to identify the cyanobacterial phylotypes in sediments and plankton of saline-alkaline and freshwater lakes of Kenya. The detection of the aminotransferase domain located on modules mcyE and ndaF using specific molecular markers confirmed the presence of potential toxin-producing cyanobacteria. Th ...
DOI:
10.1111/j.1574-6941.2009.00678.x
PubMed:
19416349

26. Peptide diversity in strains of the cyanobacterium Microcystis aeruginosa isolated from Portuguese water supplies

Author:
Joana Martins; Martin L. Saker; Cristiana Moreira; Martin Welker; Jutta Fastner; Vitor M. Vasconcelos
Source:
Applied microbiology and biotechnology 2009 v.82 no.5 pp. 951-961
ISSN:
0175-7598
Subject:
DNA; Microcystis aeruginosa; biosynthesis; chemotypes; cluster analysis; genes; lakes; matrix-assisted laser desorption-ionization mass spectrometry; microcystins; phylogeny; rivers; water supply; Portugal
Abstract:
... Strains of the cyanobacterium Microcystis aeruginosa were isolated into pure culture from a variety of lakes, rivers, and reservoirs in Portugal. Samples were tested with matrix-assisted laser desorption/ionization–time-of-flight mass spectrometry (MALDI-TOF MS) to investigate the presence of various peptide groups including aeruginosins, microginins, anabaenopeptins, cyanopeptilins, microcystins, ...
DOI:
10.1007/s00253-009-1877-z
PubMed:
19205692

27. Phosphorus cycling between the colonial cyanobacterium Microcystis aeruginosa and attached bacteria, Pseudomonas

Author:
Yuan, Lina; Zhu, Wei; Xiao, Lin; Yang, Liuyan
Source:
Aquatic ecology 2009 v.43 no.4 pp. 859-866
ISSN:
1386-2588
Subject:
Microcystis aeruginosa; Pseudomonas aeruginosa; bacteria; phosphorus
Abstract:
... Phosphorus (P) transfer between Microcystis aeruginosa and the attached bacterium Pseudomonas was studied using radioactive P (³²P) and green fluorescence protein-labeled Pseudomonas. M. aeruginosa in P-starved condition took up most ³²P (70%) in water and about 50% of ³²P in ³²P-saturated bacteria in individual experiments. However, only 26% of ³²P in the ³²P-saturated M. aeruginosa was transferr ...
DOI:
10.1007/s10452-008-9227-2

28. Physiological responses of Microcystis aeruginosa PCC7806 to nonanoic acid stress

Author:
Shao, Ji-Hai; Wu, Xing-Qiang; Li, Ren-Hui
Source:
Environmental toxicology 2009 v.24 no.6 pp. 610-617
ISSN:
1520-4081
Subject:
Microcystis aeruginosa; allelochemicals; carotenoids; nitrogen; oxygen; pelargonic acid; phosphorus; photosynthesis; physiological response
Abstract:
... A recent study has shown that nonanoic acid (NA) is one of the strongest allelochemicals to a cyanobacterium Microcystis aeruginosa, but the physiological responses of M. aeruginosa to NA stress remain unknown. In this study, physiological characters such as the growth rate, photosynthetic processes, phosphorus and nitrogen uptake kinetics, and the contents of intracellular microcystin of M. aerug ...
DOI:
10.1002/tox.20462
PubMed:
19065630

29. Seasonal dynamics of zooplankton in a shallow eutrophic, man-made hyposaline lake in Delhi (India): role of environmental factors

Author:
Arora, Jyoti; Mehra, N. K.
Source:
Hydrobiologia 2009 v.626 no.1 pp. 27-40
ISSN:
0018-8158
Subject:
nutrient content; cations; watersheds; seasonal variation; Microcystis aeruginosa; groundwater; biochemical oxygen demand; zooplankton; interspecific variation; lakes; Mesocyclops; multivariate analysis; surface water; water quality; community structure; species diversity; chemical oxygen demand; Brachionus; silicates; physicochemical properties; environmental factors; rain; nitrates; India
Abstract:
... Old Fort Lake, a small (1.6 ha), shallow, and recreational water body in Delhi (India) was studied through monthly surveys in two consecutive years (January, 2000-December, 2001). Precipitation is the major source of water for this closed basin lake. In addition, ground water is used for replenishing the lake regularly. This alkaline, hyposaline hard water lake contains very high ionic concentrati ...
DOI:
10.1007/s10750-009-9735-7

30. Selective Bactericidal Potential of Rice (Oryza sativa L. var. japonica) Hull Extract on Microcystis Strains in Comparison with Green Algae and Zooplankton

Author:
Park, Myung-Hwan; Kim, Baik-Ho; Chung, Ill-Min; Hwang, Soon-Jin
Source:
Bulletin of environmental contamination and toxicology 2009 v.83 no.1 pp. 97-101
ISSN:
0007-4861
Subject:
Daphnia magna; Microcystis aeruginosa; Oryza sativa; Scenedesmus quadricauda; hulls; rice; zooplankton
Abstract:
... We examined the selective inhibitory potential of rice hull extract on the toxic cyanobacterium Microcystis aeruginosa, in comparison with inhibitory effects on two green algae (Ankistrodesmus convolutus and Scenedesmus quadricauda) and a zooplankton (Daphnia magna) species. The inhibitory effect of rice hull extract, measured by algal growth or zooplankton survival using four different concentrat ...
DOI:
10.1007/s00128-009-9732-6
PubMed:
19434356

31. Short term copper toxicity on Microcystis aeruginosa and Chlorella vulgaris using flow cytometry

Author:
Hadjoudja, Souad; Vignoles, Chantal; Deluchat, Véronique; Lenain, Jean-François; Le Jeune, Anne-Hélène; Baudu, Michel
Source:
Aquatic toxicology 2009 v.94 no.4 pp. 255-264
ISSN:
0166-445X
Subject:
copper sulfate; algicides; toxicity testing; flow cytometry; microbial growth; phytoplankton; Microcystis aeruginosa; Chlorella vulgaris; esterases; enzyme activity
Abstract:
... Copper sulphate is a common algaecide applied to ponds in order to keep phytoplanktonic blooms under control, especially those prone to cyanobacterial development. The copper toxicity was evaluated for two phytoplanktonic species with the same size and shape: one cyanobacteria Microcystis aeruginosa and one chlorophyceae Chlorella vulgaris. Under controlled conditions in order to keep free copper ...
DOI:
10.1016/j.aquatox.2009.07.007
PubMed:
19716610

32. Toxic effects induced by salt stress on selected freshwater prokaryotic and eukaryotic microalgal species

Author:
Bartolomé, M. C.; D'ors, A.; Sánchez-Fortún, S.
Source:
Ecotoxicology 2009 v.18 no.2 pp. 174-179
ISSN:
0963-9292
Subject:
Dictyosphaerium; Microcystis aeruginosa; culture media; freshwater; microalgae; oxygen; photosystem II; salt stress; toxicity
Abstract:
... In order to determine the short-term impact induced by salt stress, cultures of Dictyosphaerium chlorelloides and Microcystis aeruginosa were grown in presence of increasing sea-salt concentrations. Growth rate and photosystem II activity in D. chlorelloides, and photosynthetic oxygen production (in both species) were analyzed. A concentration-dependent response was obtained with the presence of s ...
DOI:
10.1007/s10646-008-0269-y
PubMed:
18855137

33. A comparison of the role of two blue-green algae in THM and HAA formation

Author:
Huang, J.; Graham, N.; Templeton, M.R.; Zhang, Y.; Collins, C.; Nieuwenhuijsen, M.
Source:
Water research 2009 v.43 no.12 pp. 3009-3018
ISSN:
0043-1354
Subject:
Anabaena flos-aquae; Microcystis aeruginosa; water pollution; pollutants; disinfection; byproducts; organic matter; plant growth
DOI:
10.1016/j.watres.2009.04.029
PubMed:
19457536

34. The ecological stoichiometry of toxins produced by harmful cyanobacteria: an experimental test of the carbon-nutrient balance hypothesis

Author:
Van de Waal, Dedmer B.; Verspagen, Jolanda M.H.; Lürling, Miquel; Van Donk, Ellen; Visser, Petra M.; Huisman, Jef
Source:
Ecology letters 2009 v.12 no.12 pp. 1326-1335
ISSN:
1461-023X
Subject:
Microcystis aeruginosa; carbon; carbon dioxide; elemental composition; lakes; microcystins; nitrates; nitrogen; nutrients; secondary metabolites; stoichiometry; trophic relationships
Abstract:
... The elemental composition of primary producers reflects the availability of light, carbon and nutrients in their environment. According to the carbon-nutrient balance hypothesis, this has implications for the production of secondary metabolites. To test this hypothesis, we investigated a family of toxins, known as microcystins, produced by harmful cyanobacteria. The strain Microcystis aeruginosa H ...
DOI:
10.1111/j.1461-0248.2009.01383.x
PubMed:
19754885

35. The effect of a mixotrophic chrysophyte on toxic and colony-forming cyanobacteria

Author:
VAN DONK, ELLEN; CERBIN, SLAWEK; WILKEN, SUSANNE; HELMSING, NICO R.; PTACNIK, ROBERT; VERSCHOOR, ANTONIE M.
Source:
Freshwater biology 2009 v.54 no.9 pp. 1843-1855
ISSN:
0046-5070
Subject:
Microcystis aeruginosa; Ochromonas; Pseudanabaena; biomass; cyanobacterial toxins; environmental factors; grazing; lakes; pH; temperature; toxicity
Abstract:
... 1. In order to test the effect of Ochromonas sp., a mixotrophic chrysophyte, on cyanobacteria, grazing experiments were performed under controlled conditions. We studied grazing on three Microcystis aeruginosa strains, varying in toxicity and morphology, as well as on one filamentous cyanobacterium, Pseudanabaena sp. Furthermore, we analysed the co-occurrence of Ochromonas and Microcystis in natur ...
DOI:
10.1111/j.1365-2427.2009.02227.x

36. The importance of cellular phosphorus in controlling the uptake and toxicity of cadmium and zinc in Microcystis aeruginosa, a freshwater cyanobacterium

Author:
Zeng, Jin; Wang, Wen-Xiong
Source:
Environmental toxicology and chemistry 2009 v.28 no.8 pp. 1618-1626
ISSN:
0730-7268
Subject:
Microcystis aeruginosa; phosphorus; chemical concentration; toxicity; cadmium; zinc; uptake mechanisms
Abstract:
... In the present study, we quantified the 4-h uptake and 48-h toxicity of Cd and Zn in a freshwater cyanobacterium, Microcystis aeruginosa, under varied cellular and ambient P concentrations. After acclimation under different P conditions, the cyanobacteria had different cellular P concentrations. We found that an elevated cellular P concentration significantly promoted the short-term uptake of Cd a ...
DOI:
10.1897/08-639.1
PubMed:
19290679

37. The influence of a toxic cyanobacterial bloom and water hydrology on algal populations and macroinvertebrate abundance in the upper littoral zone of Lake Krugersdrift, South Africa

Author:
Oberholster, Paul J.; Botha, Anna-Maria; Ashton, Peter J.
Source:
Ecotoxicology 2009 v.18 no.1 pp. 34-46
ISSN:
0963-9292
Subject:
Chironomidae; Diatoma; Microcystis aeruginosa; Tubificidae; Ulothrix; alkalinity; allelopathy; dissolved oxygen; enzyme-linked immunosorbent assay; flora; genes; genetic markers; lakes; littoral zone; macroinvertebrates; pH; photosynthesis; toxicity; water quality; watersheds; South Africa
Abstract:
... The biological interactions and the physical and chemical properties of the littoral zone of Lake Krugersdrift were studied for a 4-month period when a dense, toxic cyanobacterial bloom dominated by Microcystis aeruginosa was present in the main lake basin. The presence of a toxic strain of M. aeruginosa was confirmed through the use of ELISA and molecular markers that detect the presence of the m ...
DOI:
10.1007/s10646-008-0254-5
PubMed:
18802748