| Budget Amount *help |
¥19,110,000 (Direct Cost: ¥14,700,000、Indirect Cost: ¥4,410,000)
Fiscal Year 2015: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2014: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2013: ¥11,180,000 (Direct Cost: ¥8,600,000、Indirect Cost: ¥2,580,000)
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| Outline of Final Research Achievements |
The objective of the present study was to determine the impact on the growth and the mechanism (in terms of crop physiology) of tissue tolerance in the salinity tolerance of rice. New salinity tolerant rice cultivars with tissue tolerance showed better growth and less salinity-caused damages under salinized conditions in comparison to a salinity-sensitive check cultivar. However, Na+ accumulation levelin shoots of the cultivars with tissue tolerance was comparable to that of the salinity-sensitive one. It is indicated that tissue tolerance contributes to the salinity tolerance in an independent manner of salt exclusion mechanism. Also, the tissue tolerance might be related to antioxidant activity to inhibit lipid peroxidation under salinity. Within the Japanese rice cultivars used in this study, new salinity-tolerant cultivars with tissue tolerance was not screened, which indicated that the tissue tolerance can be used for improving the salinity tolerance of Japanese rice cultivars.
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