Journal
OCEANOLOGICAL AND HYDROBIOLOGICAL STUDIES
Volume 46, Issue 4, Pages 439-450Publisher
WALTER DE GRUYTER GMBH
DOI: 10.1515/ohs-2017-0043
Keywords
Dinophysis; Diarrheic Shellfish Poisoning (DSP); pectenotoxins (PTXs); okadaic acid (OA); dinophysistoxins (DTXs)
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Funding
- Natural Science Foundation of China [41306095]
- NSFC [41176086, 41276099]
- Strategic Priority Research Program of the Chinese Academy of Science [XDA11020405]
- CAS scientific project of innovation and interdisciplinary research
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Dinophysis species are distributed worldwide and cause diarrheic shellfish poisoning (DSP). This paper documents the first successful culture of a Dinophysis (DAYS01) strain taken off Xiaoping Island, the Yellow Sea, China. The strain was identified as Dinophysis acuminata Claparede & Lachmann by morphological and phylogenetic analysis. The effects of temperature and different Mesodinium prey on the physiological and toxigenic characteristics of D. acuminata DAYS01 were also investigated. The results showed that the toxin concentration (toxin amount per ml of culture) increased with an increase in cell densities. Okadaic acid (OA), dinophysistoxin 1 (DTX1) and pectenotoxin 2 (PTX2) were the major toxin components of DAYS01, with the highest recorded toxin content of 5.66, 0.56 and 192.87 ng ml(-1) culture medium, respectively. The prey type significantly influenced the growth yield in Dinophysis cultures. There was an effect of prey on the total toxin content, suggesting that the origin or strain of ciliate directly impacted the D. acuminata blooms and the overall toxin concentration in the system.
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