Toxicity, morphology and distribution of Pseudo-nitzschia calliantha, P. multistriata and P. multiseries (Bacillariophyta) from the northwestern Sea of Japan
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Tatiana Yu. Orlova
Abstract
Toxicity, morphology and distribution patterns of three bloom-forming species of the diatom genus Pseudo-nitzschia (potential producers of the neurotoxin domoic acid and causative organisms of amnesic shellfish poisoning) from Peter the Great Bay in the northwestern Sea of Japan are presented. Pseudo-nitzschiacalliantha, P. multistriata and P.multiseries bloomed in Peter the Great Bay in the fall, with abundances exceeding 106 cells l-1. This is the first report of toxicity in P. multiseries from Russian waters. Domoic acid was found in stationary-phase (days 20–35) cultures of P. multiseries isolated from Peter the Great Bay at concentrations varying between 180 and 5390 ng ml-1 or 2 to 21 pg cell-1, which is in the range reported for other isolates of P. multiseries. The Russian isolate had an increasing ability to produce domoic acid over time in culture rather than the usual trend of decreasing toxicity. No domoic acid was detected (<2 ng ml-1) in cultures of P. calliantha and P. multistriata from the same locality. The Russian isolate of P. multiseries produced gametes when mated with the Canadian strains of the opposite mating type, but they never developed into zygotes, auxospores or large initial cells. This suggests that there might be “cryptic” species within P. multiseries. However, a comparison of molecular and morphometric data between the Russian and Canadian strains showed that they indeed belong to the same species.
©2008 by Walter de Gruyter Berlin New York
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Artikel in diesem Heft
- Review
- Alien marine macrophytes in Greece: a review
- Research articles
- Effects of erosion and macroalgae on intertidal eelgrass (Zostera marina) in a northeastern Pacific estuary (USA)
- A reassessment of Halophila species (Hydrocharitaceae) diversity with special reference to Japanese representatives
- Survey and phytochemical analysis of seagrasses in the Gulf of Mannar, southeast coast of India
- Temperature response in a shallow-water Mediterranean population of Caulerpa racemosa var. cylindracea (Caulerpales, Chlorophyta), and a possible strategy of season anticipation
- Dynamics and patterns of algal colonization on mechanically damaged and dead colonies of the coral Porites lutea
- Toxicity, morphology and distribution of Pseudo-nitzschia calliantha, P. multistriata and P. multiseries (Bacillariophyta) from the northwestern Sea of Japan
- Ceramium periconicum sp. nov. (Ceramiaceae, Rhodophyta): a new subtidal species from Baja California Sur, Mexico
- Seaweed polysaccharides with anticancer potential
- Iron, zinc, copper, lead and cadmium contents in Ruppia maritima from a Mediterranean coastal lagoon: monthly variation and distribution in different plant fractions
- Taxonomy and molecular phylogeny of Arthrobotrys mangrovispora, a new marine nematode-trapping fungal species
- Meetings
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