| Budget Amount *help |
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2017: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2016: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2015: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
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| Outline of Final Research Achievements |
The chlorarachniophytes acquired their plastids from a green alga via a secondary endosymbiosis. To know the evolution of ancestral host-related organisms before the plastid acquisition, the colorless cercozoans that are closely related to the chlorarachniophytes were searched and 5 new cultured strains were established, and new findings on the phylogeny, taxonomy and evolution were obtained from morphological and ultrastructureal observantions and RNAseq analyses. The present research revealed that there are 3 clades of cercozoans that are closely related to the chlorarachniophytes and that the acquisition of plastid via the secondary endosymbiosis occurred at the ancestor of chlorarachniophytes after diverged from those sister cercozoans. The new findings on the evolution of flagellar apparatus were also provided. The presence of three new species of Minorisa, the closest colorless relative of chlorarachniophytes, were also suggested.
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