| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Outline of Final Research Achievements |
To evaluate the availability of cooling by enhanced transpiration from leaf surface as an avoiding mechanism for heat induced spikelet sterility in rice, a high leaf transpiration mutant line (LTL) of cultivar ‘Hinohikari’ was compared with its wild type (WT) for sterility under the field condition at the test sites in Japan where an encounter with heat wave during their flowering stage could be expected. In the year that heat waves hit the flowering stage of LTL and WT, rough rice yield of WT decreased to 34% of that in the years of less severe temperature, whereas that of LTL showed 10 percentage point less decrease, indicating that the cooling by enhanced transpiration from leaf surface can be a promising option to avoid heat induced spikelet sterility in rice.
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