| Budget Amount *help |
¥112,580,000 (Direct Cost: ¥86,600,000、Indirect Cost: ¥25,980,000)
Fiscal Year 2015: ¥21,320,000 (Direct Cost: ¥16,400,000、Indirect Cost: ¥4,920,000)
Fiscal Year 2014: ¥21,320,000 (Direct Cost: ¥16,400,000、Indirect Cost: ¥4,920,000)
Fiscal Year 2013: ¥22,490,000 (Direct Cost: ¥17,300,000、Indirect Cost: ¥5,190,000)
Fiscal Year 2012: ¥22,230,000 (Direct Cost: ¥17,100,000、Indirect Cost: ¥5,130,000)
Fiscal Year 2011: ¥25,220,000 (Direct Cost: ¥19,400,000、Indirect Cost: ¥5,820,000)
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| Outline of Final Research Achievements |
Rhopalodiacean diatoms are known to possess cyanobacrerial endosymbionts (so-called spheroid bodies). In this study, we explored the evolutionary process transformed the endosymbiotic cyanobacterium into a part of the host cell. We obtained large-scale sequence data from both host and endosymbiont, and succeeded in shedding light on the mechanism which enables to maintain and control the endosymbiont in the host cell. We also searched for the free-living cyanobacterium that is the closest relative of spheroid bodies.
We also studied Paulinella chromatophora bearing a cyanobactrium-derived, photosynthetic organelle (so-called cyanelle), and investigated how the acquisition of cyanelle altered the host genome. We generated large-scale genomic, transcriptomic, and transcription start site data of P. chromatophora, and are working on these data to elucidate the precise process that allows the host cell to establish the photosynthetic organelle from an endosymbiotic cyanobacterium.
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