Taxonomy and ecology of parasitic chytrid on toxic marine plankton

• Project/Area Number: 21580239
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: General fisheries
• Research Institution: Fisheries Research Agency
• Principal Investigator: YAMAGUCHI Mineo 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・環境保全研究センター, 主幹研究員 (00371956)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 菌類 / ツボカビ / 有毒プランクトン / 寄生 / シスト / 過鞭毛藻 / 海洋 / 渦鞭毛藻

Research Abstract

During the germination experiments of the cysts of the toxic dinoflagellate Alexandrium tamarense, we found that the germinated cells were infected by a kind of parasitic fungus. Purpose of this study was to identify the fungus by examining the morphology and the development with light and electron microscopes. Ultrastructure of the zoospore and rDNA sequences indicate that the fungus belong to Chytridiales. Our finding is the first report of fungal parasitism on the toxic marine dinoflagellate and suggests that chytrid fungus may play an important role in marine environment as in freshwater system.

Research Products

• [Presentation] 海産有毒プランクトンに寄生するツボカビについて (2011)
  • Author(s): 山旦峰生,小池香苗,坂本節子
  • Organizer: 日本菌学会第55回大会
  • Place of Presentation: 北海道大学(札幌)
  • Year and Date: 2011-09-10
• [Presentation] Possible impact of parasitic chytrid on population dynamic of the toxic marine dinoflagellate Alexandrium tamarense (2010)
  • Author(s): Yamaguchi M, Koike K, Sakamoto S
  • Organizer: 14th International Conference on Harmful Algae
  • Place of Presentation: Creta & Terra Maris Convention Center(ギリシャ)
  • Year and Date: 2010-11-04
• [Presentation] 有毒渦鞭毛藻Alexandriumtamarenseに寄生する菌類の発達過程と形態学的特徴 (2009)
  • Author(s): 山口峰生,坂本節子,小池香苗,山口晴生,高野義人
  • Organizer: 2009年度日本プランクトン学会・日本ベントス学会合同大会
  • Place of Presentation: 北海道大学水産学部(函館)
  • Year and Date: 2009-10-18
• [Presentation] 有毒渦鞭毛藻 Alexandrium tamarense に寄生する菌類の発達過程と形態学的特徴 (2009)
  • Author(s): 山口峰生
  • Organizer: 2009年度日本プランクトン学会・日本ベントス学会合同大会
  • Place of Presentation: 北海道大学水産学部(函館)
  • Year and Date: 2009-10-18