| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2015: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2014: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2013: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2012: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
|
|---|
| Outline of Final Research Achievements |
This study aimed at the construction of a dynamic environmental response model of the CO2-concentrating mechanism (CCM) by elucidating the molecular mechanisms of the CCM and its environmental response in marine diatoms, a major marine photosynthetic organism, which is responsible for about 20% annual global CO2 fixation. The mechanisms to take up bicarbonate using "pump proteins" from seawater and to accumulate inorganic carbon into the chloroplast were clarified. Further analyses of CCM response to ocean iron limitation, changing CO2, light, and nitrogen revealed that marine diatoms save energy to drive CCM when grown in high CO2, but they drive a minimum efficient CCM system to support photosynthesis under iron and/or CO2 limitation. This minimum CCM system also works for dissipation of excess light energy by maintaining CO2 cycle across plasma membrane.
|
