Induction and control mechanism on the dormancy and germination of cysts of harmful dinoflagellate Gymnodinium catenatum

2015 Fiscal Year Final Research Report

• Project/Area Number: 23580272
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: General fisheries
• Research Institution: Japan Fisheries Research and Education Agency
• Principal Investigator: Sakamoto Setsuko 国立研究開発法人水産総合研究センター, その他部局等, 主任研究員 (40265723)
• Project Period (FY): 2011-04-28 – 2016-03-31
• Keywords: 有害有毒プランクトン / シスト / 発現遺伝子 / 休眠 / 発芽 / 生活史

Outline of Final Research Achievements

The dinoflagellates include many harmful species causing red tide and shellfish poisoning. Some species in the dinoflagellate produce cysts in the life cycle. The existence of the cyst affects to the distribution expansion and colonization in new waters. However, the molecular biological induction and control mechanism of the cyst germination is still unknown. In this study, to clarify the control mechanism of induction of dormancy and germination in molecular biology, the expression gene from the cysts of harmful dinoflagellate Gymnodinium catenatum was analyzed. As the result, several expression gene sequences of functional proteins such as light-harvesting proteins, chlorophyll a-b binding protein, and ABC transporter ATP-binding subunit were obtained from the dormant cyst. This result suggests that preparation of the cyst germination advanced always from the dormant period.

Free Research Field

水産海洋学