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You searched for: Journal Journal of phycology Remove constraint Journal: Journal of phycology Publication Year 2011 Remove constraint Publication Year: 2011 Source 2011 v.47 no.2 Remove constraint Source: 2011 v.47 no.2
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1. A Multispecies laboratory assessment of rapid sporophyte recruitment from delayed kelp gametophytes¹

Author:
Carney, Laura T.
Source:
Journal of phycology 2011 v.47 no.2 pp. 244-251
ISSN:
0022-3646
Subject:
viability; macroalgae; Macrocystis pyrifera; gametophytes; fecundity; sporophytes; nutrients; adults; California
Abstract:
... Recent work suggests that the ability to delay reproduction as resistant haploid gametophytes may be important for seaweeds that experience unpredictable disturbances or seasonal periods of poor conditions that result in adult sporophyte absence. Further, delayed gametophytes of some kelp species (order Laminariales) may produce sporophytes more rapidly than if they had never experienced a delay, ...
DOI:
10.1111/j.1529-8817.2011.00957.x

2. AN Optimized method for the isolation of nuclei from chlamydomonas reinhardtii (chlorophyceae)¹

Author:
Winck, Flavia Vischi; Kwasniewski, Miroslaw; Wienkoop, Stefanie; Mueller-Roeber, Bernd
Source:
Journal of phycology 2011 v.47 no.2 pp. 333-340
ISSN:
0022-3646
Subject:
Chlamydomonas reinhardtii; RNA; centrifugation; chromatin; genes; nuclear genome; nuclear proteins; proteomics; ribosomes; transcription (genetics); transcription factors
Abstract:
... The cell nucleus harbors a large number of proteins involved in transcription, RNA processing, chromatin remodeling, nuclear signaling, and ribosome assembly. The nuclear genome of the model alga Chlamydomonas reinhardtii P. A. Dang. was recently sequenced, and many genes encoding nuclear proteins, including transcription factors and transcription regulators, have been identified through computati ...
DOI:
10.1111/j.1529-8817.2011.00967.x

3. Barrufeta bravensis gen. nov. sp. nov. (dinophyceae): a new bloom-forming species from the northwest mediterranean sea¹

Author:
Sampedro, Nagore; Fraga, Santiago; Penna, Antonella; Casabianca, Silvia; Zapata, Manuel; Grünewald, Claudio Fuentes; Riobó, Pilar; Camp, Jordi
Source:
Journal of phycology 2011 v.47 no.2 pp. 375-392
ISSN:
0022-3646
Subject:
Gymnodinium; chloroplasts; fatty acids; high performance liquid chromatography; internal transcribed spacers; new species; pigments; ribosomal DNA; Mediterranean Sea
Abstract:
... The present study describes a new dinoflagellate genus, Barrufeta N. Sampedro et S. Fraga gen. nov., with one new species, B. bravensis Sampedro et S. Fraga sp. nov., isolated from the Costa Brava (NW Mediterranean Sea). The dinoflagellate was characterized at the genus and species levels by LM and EM; LSU and internal transcribed spacer (ITS) rDNA sequences; and HPLC analyses of the pigments, fat ...
DOI:
10.1111/j.1529-8817.2011.00968.x

4. Bioactive proteins, peptides, and amino acids from macroalgae¹

Author:
Harnedy, Pádraigín A.; FitzGerald, Richard J.
Source:
Journal of phycology 2011 v.47 no.2 pp. 218-232
ISSN:
0022-3646
Subject:
amino acids; bioactive properties; biochemical pathways; cyclic peptides; functional foods; macroalgae; marine environment; proteins; raw materials
Abstract:
... Macroalgae are a diverse group of marine organisms that have developed complex and unique metabolic pathways to ensure survival in highly competitive marine environments. As a result, these organisms have been targeted for mining of natural biologically active components. The exploration of marine organisms has revealed numerous bioactive compounds that are proteinaceous in nature. These include p ...
DOI:
10.1111/j.1529-8817.2011.00969.x

5. Changes in endogenous cytokinin concentrations in chlorella (chlorophyceae) in relation to light and the cell cycle¹

Author:
Stirk, Wendy A.; van Staden, Johannes; Novák, Ondřej; Doležal, Karel; Strnad, Miroslav; Dobrev, Petre I.; Sipos, György; Ördög, Vince; Bálint, Péter
Source:
Journal of phycology 2011 v.47 no.2 pp. 291-301
ISSN:
0022-3646
Subject:
Chlorella minutissima; DNA; cell division; cytokinins; photophase; scotophase
Abstract:
... Endogenous cytokinins were quantified in synchronized Chlorella minutissima Fott et Novákova (MACC 361) and Chlorella sp. (MACC 458) grown in a 14:10 light:dark (L:D) photoperiod. In 24 h experiments, cell division occurred during the dark period, and cells increased in size during the light period. Cytokinin profiles were similar in both strains, consisting of five cis-zeatin (cZ) and three N⁶-(2 ...
DOI:
10.1111/j.1529-8817.2010.00952.x

6. DISCRIMINATIVE POWER OF NUCLEAR rDNA SEQUENCES FOR THE DNA TAXONOMY OF THE DINOFLAGELLATE GENUS PERIDINIUM (DINOPHYCEAE)¹

Author:
Ki, Jang-Seu; Park, Myung-Hwan; Han, Myung-Soo
Source:
Journal of phycology 2011 v.47 no.2 pp. 426-435
ISSN:
0022-3646
Subject:
Bayesian theory; Peridinium; genetic markers; genetic variation; nuclear power; nucleotide sequences; ribosomal DNA; statistical analysis; taxonomy; topology
Abstract:
... The genus Peridinium Ehrenb. comprises a group of highly diversified dinoflagellates. Their morphological taxonomy has been established over the last century. Here, we examined relationships within the genus Peridinium, including Peridinium bipes F. Stein sensu lato, based on a molecular phylogeny derived from nuclear rDNA sequences. Extensive rDNA analyses of nine selected Peridinium species show ...
DOI:
10.1111/j.1529-8817.2010.00950.x

7. Ecological and evolutionary implications of carbon allocation in marine phytoplankton as a function of nitrogen availability: a fourier transform infrared spectroscopy approach¹

Author:
Palmucci, Matteo; Ratti, Simona; Giordano, Mario
Source:
Journal of phycology 2011 v.47 no.2 pp. 313-323
ISSN:
0022-3646
Subject:
Dunaliella; Fourier transform infrared spectroscopy; Thalassiosira; carbohydrates; carbon; carbon nitrogen ratio; chloroplasts; lipid content; lipids; microalgae; nitrogen; palatability; phytoplankton; species diversity; taxonomy
Abstract:
... An imbalance in the cellular C:N ratio may appreciably affect C allocation in algal cells. The consequences of these rearrangements of cellular pools on cell energetics, ecological fitness, and evolutionary trajectories are little known, although they are expected to be substantial. We investigated the fate of C in 11 microalgae cultured semicontinuously at three [NO₃ ⁻] and constant pCO₂. We deve ...
DOI:
10.1111/j.1529-8817.2011.00963.x

8. Effect of zinc availability on growth, morphology, and nutrient incorporation in a coastal and an oceanic diatom¹

Author:
Varela, Diana E.; Willers, Valeria; Crawford, David W.
Source:
Journal of phycology 2011 v.47 no.2 pp. 302-312
ISSN:
0022-3646
Subject:
Skeletonema costatum; Thalassiosira; cell biology; silicon; stoichiometry; surface area; zinc
Abstract:
... We investigated the effect of Zn availability on growth rate (μ), cell morphology, and elemental stoichiometry and incorporation rate in two marine diatoms. For the coastal diatom Skeletonema costatum (Grev.) Cleve, the half-saturation constant (KS) for growth was 4.1 pM Zn²⁺, and growth ceased at ≤ 2.6 pM Zn²⁺, whereas for the oceanic diatom Thalassiosira oceanica Hasle, KS was 0.5 pM Zn²⁺, and μ ...
DOI:
10.1111/j.1529-8817.2010.00948.x

9. EVOLUTIONARY ANALYSES OF THE NUCLEAR-ENCODED PHOTOSYNTHETIC GENE psbO FROM TERTIARY PLASTID-CONTAINING ALGAE IN DINOPHYTA¹

Author:
Yokoyama, Akiko; Takahashi, Fumio; Kataoka, Hironao; Hara, Yoshiaki; Nozaki, Hisayoshi
Source:
Journal of phycology 2011 v.47 no.2 pp. 407-414
ISSN:
0022-3646
Subject:
proteins; Bacillariophyta; ancestry; phylogeny; amino acid sequences; plastids; genes; autotrophs; Rhodophyta
Abstract:
... Although the dinophytes generally possess red-algal-derived secondary plastids, tertiary plastids originating from haptophyte and diatom ancestors are recognized in some lineages within the Dinophyta. However, little is known about the nuclear-encoded genes of plastid-targeted proteins from the dinophytes with diatom-derived tertiary plastids. We analyzed the sequences of the nuclear psbO gene enc ...
DOI:
10.1111/j.1529-8817.2011.00961.x

10. Flow-induced morphological variations affect diffusion boundary-layer thickness of macrocystis pyrifera (heterokontophyta, laminariales)¹

Author:
Hurd, Catriona L.; Pilditch, Conrad A.
Source:
Journal of phycology 2011 v.47 no.2 pp. 341-351
ISSN:
0022-3646
Subject:
Macrocystis pyrifera; acoustics; macroalgae; nutrients; oxygen; seawater; turbulent flow
Abstract:
... In slow mainstream flows (<4-6 cm · s⁻¹), the transport of dissolved nutrients to seaweed blade surfaces is reduced due to the formation of thicker diffusion boundary layers (DBLs). The blade morphology of Macrocystis pyrifera (L.) C. Agardh varies with the hydrodynamic environment in which it grows; wave-exposed blades are narrow and thick with small surface corrugations (1 mm tall), whereas wave ...
DOI:
10.1111/j.1529-8817.2011.00958.x

11. Grazing on giant kelp microscopic phases and the recruitment success of annual populations of macrocystis pyrifera (laminariales, phaeophyta) in southern chile¹

Author:
Henríquez, Luis A.; Buschmann, Alejandro H.; Maldonado, Miguel A.; Graham, Michael H.; Hernández-González, María Carmen; Pereda, Sandra V.; Bobadilla, Marcelo I.
Source:
Journal of phycology 2011 v.47 no.2 pp. 252-258
ISSN:
0022-3646
Subject:
macroalgae; Macrocystis pyrifera; gametophytes; Gastropoda; reproduction; winter; grazing; males; snails; spring; field experimentation; sporophytes; Chile
Abstract:
... The giant kelp Macrocystis pyrifera (L.) C. Agardh is widely distributed in the Northern Hemisphere and Southern Hemisphere, yet it exhibits distinct population dynamics at local to regional spatial scales. Giant kelp populations are typically perennial with the potential for year-round reproduction and recruitment. In southern Chile, however, annual giant kelp populations exist and often persist ...
DOI:
10.1111/j.1529-8817.2010.00955.x

12. Lipoxygenase products in marine diatoms: a concise analytical method to explore the functional potential of oxylipins¹

Author:
Cutignano, Adele; Lamari, Nadia; d'ippolito, Giuliana; Manzo, Emiliano; Cimino, Guido; Fontana, Angelo
Source:
Journal of phycology 2011 v.47 no.2 pp. 233-243
ISSN:
0022-3646
Subject:
oxylipins; plankton; reversed-phase liquid chromatography; linoleate 13S-lipoxygenase; polyunsaturated fatty acids; Bacillariophyta
Abstract:
... Oxylipins are oxygenated derivatives of polyunsaturated fatty acids (PUFAs) that act as chemical mediators in many ecological and physiological processes in marine and freshwater diatoms. The occurrence and distribution of these molecules are relatively widespread within the lineage with considerable species-specific differences due to the variability of both the fatty acids recognized as substrat ...
DOI:
10.1111/j.1529-8817.2011.00972.x

13. Molecular phylogeny of dinophysoid dinoflagellates: the systematic position of oxyphysis oxytoxoides and the dinophysis hastata group (dinophysales, dinophyceae)¹

Author:
Gómez, Fernando; López-García, Purificación; Moreira, David
Source:
Journal of phycology 2011 v.47 no.2 pp. 393-406
ISSN:
0022-3646
Subject:
Dinophysis; nucleotide sequences; phylogeny; ribosomal DNA; ribosomal RNA
Abstract:
... The dinophysoid dinoflagellates are currently divided into three families: Amphisoleniaceae, Dinophysaceae (mainly Dinophysis Ehrenb. and Phalacroma F. Stein), and Oxyphysaceae, the latter including only one member, Oxyphysis oxytoxoides Kof. Phalacroma has been recently reinstated separately from Dinophysis, and its amended description is currently restricted to cells whose epithecae were large b ...
DOI:
10.1111/j.1529-8817.2011.00964.x

14. Multiscale genetic structure of an endangered seaweed ahnfeltiopsis pusilla (rhodophyta): implications for its conservation¹

Author:
Couceiro, Lucía; Maneiro, Isabel; Ruiz, José Miguel; Barreiro, Rodolfo
Source:
Journal of phycology 2011 v.47 no.2 pp. 259-268
ISSN:
0022-3646
Subject:
macroalgae; endangered species; amplified fragment length polymorphism; asexual reproduction; lawns and turf; clones; cytochrome-c oxidase; intergenic DNA; genetic variation; Rhodophyta; Iberian Peninsula
Abstract:
... Although marine macroalgae have recently entered the lists of endangered species, conservation efforts are still limited by a lack of data, particularly for naturally rare species. One example is the turf-forming Ahnfeltiopsis pusilla (Mont.) P. C. Silva et DeCew. Albeit cataloged as vulnerable in the Northwest Iberian Peninsula (NWIP), where it occurs only at five enclaves separated by 1,200 km f ...
DOI:
10.1111/j.1529-8817.2011.00959.x

15. Photoacclimation in the phototrophic marine ciliate mesodinium rubrum (ciliophora)¹

Author:
Moeller, Holly V.; Johnson, Matthew D.; Falkowski, Paul G.
Source:
Journal of phycology 2011 v.47 no.2 pp. 324-332
ISSN:
0022-3646
Subject:
Ciliophora; autotrophs; enzyme kinetics; light intensity; mitochondria; photosynthesis; plastids; McMurdo Sound
Abstract:
... Mesodinium rubrum (=Myrionecta rubra), a marine ciliate, acquires plastids, mitochondria, and nuclei from cryptophyte algae. Using a strain of M. rubrum isolated from McMurdo Sound, Antarctica, we investigated the photoacclimation potential of this trophically unique organism at a range of low irradiance levels. The compensation growth irradiance for M. rubrum was 0.5 μmol quanta · m⁻² · s⁻¹, and ...
DOI:
10.1111/j.1529-8817.2010.00954.x

16. Phylogenetic analysis of brachidinium capitatum (dinophyceae) from the gulf of mexico indicates membership in the kareniaceae¹

Author:
Henrichs, Darren W.; Sosik, Heidi M.; Olson, Robert J.; Campbell, Lisa
Source:
Journal of phycology 2011 v.47 no.2 pp. 366-374
ISSN:
0022-3646
Subject:
Dinophyceae; genes; image analysis; internal transcribed spacers; phylogeny; Gulf of Mexico
Abstract:
... Brachidinium capitatum F. J. R. Taylor, typically considered a rare oceanic dinoflagellate, and one which has not been cultured, was observed at elevated abundances (up to 65 cells · mL⁻¹) at a coastal station in the western Gulf of Mexico in the fall of 2007. Continuous data from the Imaging FlowCytobot (IFCB) provided cell images that documented the bloom during 3 weeks in early November. Guided ...
DOI:
10.1111/j.1529-8817.2011.00960.x

17. Phylogenetic diversity of trentepohlialean algae associated with lichen-forming fungi¹

Author:
Nelsen, Matthew P.; Plata, Eimy Rivas; Andrew, Carrie J.; Lücking, Robert; Lumbsch, H. Thorsten
Source:
Journal of phycology 2011 v.47 no.2 pp. 282-290
ISSN:
0022-3646
Subject:
phylogeny; trees; fungi; genetic variation; lichens
Abstract:
... Nearly one-fourth of the lichen-forming fungi associate with trentepohlialean algae, yet their genetic diversity remains unknown. Recent work focusing on free-living trentepohlialean algae has provided a phylogenetic context within which questions regarding the lichenization of these algae can be asked. Here, we concentrated our sampling on trentepohlialean algae from lichens producing a diversity ...
DOI:
10.1111/j.1529-8817.2011.00962.x

18. Physiological performance of floating giant kelp macrocystis pyrifera (phaeophyceae): latitudinal variability in the effects of temperature and grazing¹

Author:
Rothäusler, Eva; Gómez, Iván; Hinojosa, Iván A.; Karsten, Ulf; Tala, Fadia; Thiel, Martin
Source:
Journal of phycology 2011 v.47 no.2 pp. 269-281
ISSN:
0022-3646
Subject:
Macrocystis pyrifera; carbon; carbonate dehydratase; herbivores; light intensity; macroalgae; nitrogen; photosynthesis; sporophytes; water temperature
Abstract:
... Rafts of Macrocystis pyrifera (L.) C. Agardh can act as an important dispersal vehicle for a multitude of organisms, but this mechanism requires prolonged persistence of floating kelps at the sea surface. When detached, kelps become transferred into higher temperature and irradiance regimes at the sea surface, which may negatively affect kelp physiology and thus their ability to persist for long p ...
DOI:
10.1111/j.1529-8817.2011.00971.x

19. Studies on ultrastructure and three-gene phylogeny of the genus mallomonas (synurophyceae)¹

Author:
Jo, Bok Yeon; Shin, Woongghi; Boo, Sung Min; Kim, Han Soon; Siver, Peter A.
Source:
Journal of phycology 2011 v.47 no.2 pp. 415-425
ISSN:
0022-3646
Subject:
Mallomonas; freshwater; genes; habitats; phylogeny; ribosomal DNA; ribs; ribulose-bisphosphate carboxylase; setae (animal); ultrastructure
Abstract:
... The genus Mallomonas, a common and often abundant member of the planktic community in many freshwater habitats worldwide, consists of 180 species divided into 19 sections and 23 series. Classification of species is based largely on ultrastructural characteristics of the siliceous scales and bristles that collectively form a highly organized covering over the cell. However, the relative importance ...
DOI:
10.1111/j.1529-8817.2010.00953.x

20. Systematic revision of the genera liagora and izziella (liagoraceae, rhodophyta) from taiwan based on molecular analyses and carposporophyte development, with the description of two new species¹

Author:
Lin, Showe-Mei; Yang, Shi-Yuan; Huisman, John M.
Source:
Journal of phycology 2011 v.47 no.2 pp. 352-365
ISSN:
0022-3646
Subject:
Izziella; Liagora; cell fusion; new species; nucleotide sequences; sequence analysis; Taiwan
Abstract:
... Some Liagora and Izziella distributed in Taiwan display a wide range of morphological variation and can be difficult to distinguish. To clarify species concepts, we applied DNA sequence analyses and examined carposporophyte development in detail. These studies revealed two new species, which are described herein as Izziella hommersandii sp. nov. and Izziella kuroshioensis sp. nov. I. kuroshioensis ...
DOI:
10.1111/j.1529-8817.2011.00965.x