2011 Fiscal Year Final Research Report
Study on growth, physiology and toxicology of Dinophysis spp. causing diarrheic shellfish poisoning
| Project/Area Number |
20380116
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
General fisheries
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| Research Institution | Fisheries Research Agency |
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Principal Investigator |
KAMIYAMA Takashi 独立行政法人水産総合研究センター, 東北区水産研究所, 主幹研究員 (60371803)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Toshiyuki 独立行政法人水産総合研究センター, 中央水産研究所, グループ長 (70371804)
NAGAI Satoshi 独立行政法人水産総合研究センター, 瀬戸内海区水産研究所, 主任研究員 (80371962)
NISHITANI Go 東北大学, 大学院・農学研究科, 助教 (70450781)
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| Project Period (FY) |
2008 – 2011
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| Keywords | 有毒プランクトン / 下痢性貝毒 / ディノフィシス / Dinophysis acuminata / Dinophysis fortii / 毒生産 / オカダ酸 / ペクテノトキシン |
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| Research Abstract |
We examined characteristics of growth, nutritional physiology and lipophilic toxin production of the genus Dinophysis and effects of environmental conditions on them. Characteristics of cellular toxin contents and toxin composition of natural Dinophysis spp. collected in various Japanese coastal waters were clarified. In laboratory experiments growth of Dinophysis spp. depends on specific prey source, the ciliate Myrionecta rubra, feeding on the Cryptophyceae Teleaulax amphioxeia, and was influenced by temperature and light intensity. Toxin production also varied in response to these environmental factors and growth phase. Parts of toxin components were excreted into surrounding seawater with progress of the growth. Cellular toxin contents were occasionally largely different among local strains of Dinophysis species cultivated under the same conditions, suggesting effects of genetic characteristics on the toxin production.
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Research Products
(19 results)
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[Journal Article] Multiple plastids collected by the dinoflagellate Dinophysis mitra through kleptoplastidy Applied and Environmental Microbiology2012
Author(s)
Nishitani, G., Nagai, S., Hayakawa, S., Kosaka, Y., Sakurada, K., Kamiyama, T., 他1名
Volume
78
Pages
813-821
Peer Reviewed
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[Journal Article] High-level congruence of Myrionecta rubra prey and Dinophysis species plastid identities as revealed by genetic analyses of isolates from Japanese coastal waters2010
Author(s)
Nishitani, G., Nagai, S., Baba, K., Kiyokawa, S., Kousaka, Y., Miyamura, K., Nishikawa, T., Sakurada, K., Shinada, A. and Kamiyama, T.
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Journal Title
Applied and Environmental Microbiology
Volume: 76
Pages: 2791-2798
Peer Reviewed
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