Allelopathic potential of the dinoflagellate Alexandrium tamarense on marine microbial communities
نویسندگان
چکیده
منابع مشابه
Biodiversity of the Symbiotic Bacteria Associated with Toxic Marine Dinoflagellate Alexandrium tamarense
Paralytic shellfish poisoning (PSP) toxins are potent neurotoxins mainly produced by dinoflagellates and being concentrated in bivalves through food web transfer. Increasing number of findings of toxin-producing bacteria in the cells of dinoflagellate such as Alexandriumtamarense supports the hypothesis of the bacterial origin of PSP toxins. Evidence that there are specific symbiosis bacterial ...
متن کاملMode of action of membrane-disruptive lytic compounds from the marine dinoflagellate Alexandrium tamarense.
Certain allelochemicals of the marine dinoflagellate Alexandrium tamarense cause lysis of a broad spectrum of target protist cells but the lytic mechanism is poorly defined. We first hypothesized that membrane sterols serve as molecular targets of these lytic compounds, and that differences in sterol composition among donor and target cells may cause insensitivity of Alexandrium and sensitivity...
متن کاملImplications of life-history transitions on the population genetic structure of the toxigenic marine dinoflagellate Alexandrium tamarense.
Genotypic or phenotypic markers for characterization of natural populations of marine microalgae have typically addressed questions regarding differentiation among populations, usually with reference to a single or few clonal isolates. Based upon a large number of contemporaneous isolates from the same geographical population of the toxigenic species Alexandrium tamarense from the North Sea, we...
متن کاملPreliminary Characterization of Extracellular Allelochemicals of the Toxic Marine Dinoflagellate Alexandrium tamarense Using a Rhodomonas salina Bioassay
Members of the marine dinoflagellate genus Alexandrium are known to exude allelochemicals, unrelated to well-known neurotoxins (PSP-toxins, spirolides), with negative effects on other phytoplankton and marine grazers. Physico/chemical characterization of extracellular lytic compounds of A. tamarense, quantified by Rhodomonas salina bioassay, showed that the lytic activity, and hence presumably ...
متن کاملGrowth and toxin production in batch cultures of a marine dinoflagellate Alexandrium tamarense HK9301 isolated from the South China Sea
Nutritional and environmental conditions were characterized for a batch culture of the marine dinoflagellate Alexandrium tamarense HK9301 isolated from the South China Sea for its growth (cells ml ), cellular toxin content (Qt in fmol cell ) and toxin composition (mol%). Under a nutrient replete condition, Qt increased with cell growth and peaked at the late stationary phase. Toxin content incr...
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ژورنال
عنوان ژورنال: Harmful Algae
سال: 2010
ISSN: 1568-9883
DOI: 10.1016/j.hal.2010.05.007