Abstract：
:Biotic factors that affect phytoplankton physiology and behavior are not well characterized but probably play a crucial role in regulating their population dynamics in nature. We document evidence that some marine bacteria can decrease the swimming speed of motile phytoplankton through the release of putative protease(s). Using the dinoflagellate Lingulodinium polyedrum (F. Stein) J. D. Dodge as a model system, we showed that the motility-reducing components of bacterial-algal cocultures were mostly heat labile, were of high molecular weight (>50 kDa), and could be partially neutralized by incubations with protease inhibitors. We further showed that additions of the purified protease pronase E decreased dinoflagellate swimming speed in a concentration-dependent manner. We propose that motility can be used as a marker for dinoflagellate stress or general unhealthy status due to proteolytic bacteria, among other factors.
journal_name
J Phycoljournal_title
Journal of phycologyauthors
Mayali X,Franks PJ,Tanaka Y,Azam Fdoi
10.1111/j.1529-8817.2008.00549.xsubject
Has Abstractpub_date
2008-08-01 00:00:00pages
923-8issue
4eissn
0022-3646issn
1529-8817journal_volume
44pub_type
杂志文章abstract：:Global climate change is expected to alter the polar bioregions faster than any other marine environment. This study assesses the biodiversity of seaweeds and associated eukaryotic pathogens of an established study site in northern Baffin Island (72° N), providing a baseline inventory for future work assessing impacts...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12417
更新日期：2016-08-01 00:00:00
abstract：:Adenosine 5'-triphosphate (ATP) is a versatile extracellular signal along the tree of life, whereas cAMP plays a major role in vertebrates as an intracellular messenger for hormones, transmitters, tastants, and odorants. Since red algal spore coalescence may be considered analogous to the congregation process of socia...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12278
更新日期：2015-04-01 00:00:00
abstract：:Most mitochondrial genomes in the green algal phylum Chlorophyta are AT-rich, circular-mapping DNA molecules. However, mitochondrial genomes from the Reinhardtii clade of the Chlorophyceae lineage are linear and sometimes fragmented into subgenomic forms. Moreover, Polytomella capuana, from the Reinhardtii clade, has ...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2009.00753.x
更新日期：2009-12-01 00:00:00
abstract：:Algal and plant production of nonphosphorus lipids in place of phospholipids is a physiological response to low phosphorus (P) availability. This response has been shown in culture and in marine plankton studies, but examples from freshwater algae remain minimal. Herein, we analyzed the nutrient contents and lipid com...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2012.01125.x
更新日期：2012-04-01 00:00:00
abstract：:Sequences of the gene encoding the large subunit of RUBISCO (rbcL) for 30 genera in the six currently recognized families of conjugating green algae (Desmidiaceae, Gonatozygaceae, Mesotaeniaceae, Peniaceae, and Zygnemataceae) were analyzed using maximum parsimony and maximum likelihood; bootstrap replications were per...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1046/j.1529-8817.2000.99106.x
更新日期：2000-08-26 00:00:00
abstract：:Historically, the genus Calothrix included all noncolonial, tapered, heterocytous filaments within the cyanobacteria. However, recent molecular phylogenies show that "Calothrix" defined in this sense represents five distinct clades. The type species of Calothrix is marine, with solitary basal heterocytes, no akinetes,...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12425
更新日期：2016-08-01 00:00:00
abstract：:Coralline red algae play a key role in the ecology of near shore marine ecosystems and are increasingly being used to study the effects of climate change in the marine environment. Corallines are very difficult to identify to species, and even to genus, using morpho-anatomy, likely complicating studies of their ecolog...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12205
更新日期：2014-08-01 00:00:00
abstract：:The photoprotective response in the dinoflagellate Glenodinium foliaceum F. Stein exposed to ultraviolet-A (UVA) radiation (320-400 nm; 1.7 W · m(2) ) and the effect of nitrate and phosphate availability on that response have been studied. Parameters measured over a 14 d growth period in control (PAR) and experimental...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2011.01046.x
更新日期：2011-10-01 00:00:00
abstract：:Sargassum muticum (Yendo) Fensholt is an invasive species that is firmly established on intertidal and subtidal rocky shores of Europe and the Pacific coast of North America. Local success and spread of S. muticum is thought to rely on its reproductive potential that seems dependent on exogenous factors like tidal and...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2008.00619.x
更新日期：2009-02-01 00:00:00
abstract：:Brown tides of the marine pelagophyte Aureococcus anophagefferens Hargraves et Sieburth have been investigated extensively for the past two decades. Its growth is fueled by a variety of nitrogen (N) compounds, with dissolved organic nitrogen (DON) being particularly important during blooms. Characterization of a cDNA ...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2008.00571.x
更新日期：2008-10-01 00:00:00
abstract：:Dispersal on floating seaweeds depends on availability, viability, and trajectories of the rafts. In the southern hemisphere, the bull kelp Durvillaea antarctica is one of the most common floating seaweeds, but phylogeographic studies had shown low connectivity between populations from continental Chile, which could b...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12479
更新日期：2017-02-01 00:00:00
abstract：:Harmful cyanobacterial blooms (CyanoHABs) are a rapidly proliferating global problem, threatening the use and sustainability of our freshwater resources. In recent decades, the United States, China, and other developed and developing countries threatened by CyanoHAB expansion have established collaborative efforts aim...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.13058
更新日期：2020-12-01 00:00:00
abstract：:Phytoplankton forms the basis of primary production in mangrove environments. The phylogeny and diversity based on the amplification and sequencing of rbcL, the large subunit encoding the key enzyme ribulose-1, 5-bisphosphate carboxylase/oxygenase was investigated for improved understanding of the community structure ...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12163
更新日期：2014-04-01 00:00:00
abstract：:Antarctica is one of the most difficult habitats for sustaining life on earth; organisms that live there have developed different strategies for survival. Among these organisms is the green alga Prasiola crispa, belonging to the class Trebouxiophyceae. The literature on P. crispa taxonomy is scarce, and many gaps in t...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12541
更新日期：2017-08-01 00:00:00
abstract：:Flow cytometry provides a tool to physically sort single algal cells in order to obtain clonal cultures. During sorting, cells are submitted to physical stress factors such as high fluidic pressure, exposure to the laser beam, electrostatic charges, deflection through high voltage fields, and collisions with container...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12495
更新日期：2017-04-01 00:00:00
abstract：:Although light and salt stresses are known to enhance the biosynthesis of astaxanthin in certain green algae, the mechanism of their action remains largely unknown. Here we report the regulation of the genes encoding phytoene desaturase (PDS), carotenoid hydroxylase (CHYb), and carotenoid ketolase (BKT) in the green a...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2009.00689.x
更新日期：2009-06-01 00:00:00
abstract：:In batch cultures of four Mediterranean strains (from France, Italy, and Spain) of Alexandrium catenella (Whedon et Kof.) Balech growing on a daily light cycle, ammonium and urea uptake were estimated by the (15) N tracer technique. Ammonium uptake could be described by Michaelis-Menten kinetics along a substrate grad...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2008.00570.x
更新日期：2008-10-01 00:00:00
abstract：:Maintaining buoyancy with gas-filled floats (pneumatocysts) is essential for some subtidal kelps to achieve an upright stature and compete for light . However, as these kelps grow up through the water column, pneumatocysts are exposed to substantial changes in hydrostatic pressure, which could cause complications as i...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12776
更新日期：2018-10-01 00:00:00
abstract：:Pyropia yezoensis (Ueda) M. S. Hwang et H. G. Choi (previously called Porphyra yezoensis) is an economically important alga. The blades generated from conchospores are genetic chimeras, which are not suitable for genetic similarity analysis. In this study, two types of blades from a single filament of P. yezoensis spo...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12058
更新日期：2013-06-01 00:00:00
abstract：:Solar ultraviolet radiation (UVR, 280-400 nm) is known to affect macroalgal physiology negatively, while nutrient availability may affect UV-absorbing compounds (UVACs) and sensitivity to UVR. However, little is known about the interactive effects of UVR and nitrate availability on macroalgal growth and photosynthesis...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2009.00654.x
更新日期：2009-04-01 00:00:00
abstract：:The green algal genus Ulva includes a speciose group of marine macroalgae inhabiting shallow seas worldwide. Although algal blooms in Asia highlight the opportunistic nature of several "nuisance" species, recent research clearly reveals important positive benefits of Ulva. Applied research requires accurate, reliable,...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12016
更新日期：2013-02-01 00:00:00
abstract：:While rigorous techniques have usually been used to generate phylogenetic trees from molecular data, morphological analysis has sometimes been more informal. A recent example was a study of the evolution of the fultoportula in the diatom order Thalassiosirales (Kaczmarska et al. 2006). Phylogeny was inferred using mod...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2008.00522.x
更新日期：2008-06-01 00:00:00
abstract：:The North Sea-Baltic Sea transition zone constitutes a boundary area for the kelp species Saccharina latissima due to a strong salinity gradient operating in the area. Furthermore, the existence of S. latissima there, along Danish waters, is fairly patchy as hard bottom is scarce. In this study, patterns of genetic di...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12428
更新日期：2016-08-01 00:00:00
abstract：:Filaments in the surface layers of metaphytic mats are exposed to high photon flux densities of PAR and UVBR. We investigated the effect of UVBR exposure on growth of eight isolates of common metaphytic algae (Cladophora, Mougeotia, Oedogonium, Pithophora, Spirogyra, and Zygnema) acclimated to either high or low PAR l...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12786
更新日期：2018-12-01 00:00:00
abstract：:Temperature and nutrient supply are key factors that control phytoplankton ecophysiology, but their role is commonly investigated in isolation. Their combined effect on resource allocation, photosynthetic strategy, and metabolism remains poorly understood. To characterize the photosynthetic strategy and resource alloc...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12983
更新日期：2020-06-01 00:00:00
abstract：:Here, we established the cyst-motile stage relation-ship for Spiniferites pachydermus through incubation of cysts with a characteristically microreticulate/perforate surface isolated from Izmir Bay in the eastern Aegean Sea of the eastern Mediterranean. The morphology of the motile stage was similar to Gonyaulax spini...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12304
更新日期：2015-06-01 00:00:00
abstract：:Fourier transform infrared (FTIR) spectrometry was used to study the spectral features of 12 eukaryotic and two prokaryotic species of microalgae. The algae were cultured in liquid media containing either NO3 (-) or NH4 (+) as the sole N-source; for the NH4 (+) treatment, the algae were subjected to short-term (24 h) ...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/j.1529-8817.2009.00662.x
更新日期：2009-04-01 00:00:00
abstract：:Macroalgal bloom-forming species occur in coastal systems worldwide. However, due to overlapping morphologies in some taxa, accurate taxonomic assessment and classification of these species can be quite challenging. We investigated the molecular and morphological characteristics of 153 specimens of bloom-forming Ulva ...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12108
更新日期：2013-10-01 00:00:00
abstract：:d-Mannose and related derivatives, e.g., d-glucosa-mine and 2-deoxy- journal_title：Journal of phycology pub_type： 杂志文章 doi：10.1111/j.1529-8817.1968.tb04688.x 更新日期：1968-06-01 00:00:00
abstract：:The family Microchaetaceae is a large group of heterocytous cyanobacteria, whose members bear typical morphological features of uniseriate heteropolar filaments never terminated by thin hairs and with simple false branching. However, phylogenetic analyses of the gene for 16S rRNA showed that members of this traditiona...
journal_title：Journal of phycology
pub_type： 杂志文章
doi：10.1111/jpy.12241
更新日期：2014-12-01 00:00:00
