| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
During the germination experiments of the cysts by incubating sediment suspensions, we have found epibiotic and endobiotic fungal parasites on the germinated cells and/or the cysts of marine dinoflagellates Alexandrium tamarense and Scrippsiella trochoidea. In the present study we characterized and identified these fungi by microscopic observation and rDNA sequence analysis. Results showed that the epibiotc fungi belonged to the Rhizophydium clade or Lobulomycetales, Chytridiomycota. We also succeeded in obtaining culturable strain of Rhizophydium from Ofunato Bay for the first time. Although taxonomic position of the endobiotic fungus yet to be identified, it belonged to neither “core chytrid clade” nor Oomycota. Our finding indicates that a variety of fungal parasites can have significant impacts on marine dinoflagellates and parasitism needs to be considered in understanding of their bloom dynamics.
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