| Budget Amount *help |
¥43,810,000 (Direct Cost: ¥33,700,000、Indirect Cost: ¥10,110,000)
Fiscal Year 2022: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2021: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
Fiscal Year 2020: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
Fiscal Year 2019: ¥9,360,000 (Direct Cost: ¥7,200,000、Indirect Cost: ¥2,160,000)
Fiscal Year 2018: ¥11,310,000 (Direct Cost: ¥8,700,000、Indirect Cost: ¥2,610,000)
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| Outline of Final Research Achievements |
The histone H3 modifications of a number of genes were significantly altered in anthers’ development in rice plants, indicating the presence of epigenetic regulation of pollen-specific gene expression. The epigenetic modifications were also shown to be suppressed by low temperatures (19°C), which is more pronounced in cold-sensitive cultivars. Low temperatures are known to cause abnormal enlargement of anther wall tapetum cells and altered expression of many genes, including the anther-specific gibberellin activating enzyme gene. The present findings strongly suggest that the low temperature-induced malfunction of these higher epigenetic modifications is an upstream cause of low-temperature injury in rice plants.
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