| Budget Amount *help |
¥133,900,000 (Direct Cost: ¥103,000,000、Indirect Cost: ¥30,900,000)
Fiscal Year 2013: ¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
Fiscal Year 2012: ¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
Fiscal Year 2011: ¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
Fiscal Year 2010: ¥18,980,000 (Direct Cost: ¥14,600,000、Indirect Cost: ¥4,380,000)
Fiscal Year 2009: ¥57,980,000 (Direct Cost: ¥44,600,000、Indirect Cost: ¥13,380,000)
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| Research Abstract |
Using a nitrate-transport-deficient mutant of Arabidopsis thaliana, effect of high CO2 on plant growth under limited nitrogen supply was examined. During growth under high CO2 but not under low CO2, the mutant seedlings developed well-known symptoms of nitrogen-starved plants, including decreased shoot/root ratio and accumulation of anthocyanin, but the plant also showed increased chlorophyll content, which was contradictory to the known effect of nitrogen-depletion. A high-CO2-responsive change specific to the mutant was not observed in the levels of the major metabolites; Similar CO2 responses were observed in WT and the mutant. Elevated CO2 thus causes nitrogen limitation in the seedlings grown with a constantly limited supply of nitrogen, but the chlorophyll content and the root biomass of the plant increase to enhance the activities of both photosynthesis and nitrogen uptake, while maintaining normal metabolism and response to high CO2.
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