| Budget Amount *help |
¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2014: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2013: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2012: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
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| Outline of Final Research Achievements |
It is important to understand temporal regulation of leaf initiation for improving shoot architecture of plants in the future breeding program. This study revealed a part of the genetic network of plastochron regulation in rice. Both of the expression of PLA1 and PLA2 are induced by a plant hormone, gibberellin. PLA1 and PLA2 affect the expression level of OsSPLs that are regulatory genes for leaf initiation, in independent pathways. In addition, this study uncovered that APO1 and APO2 genes also control plastochron independent of PLA1 and PLA2. Over-expression of PLA1 and PLA2 affect the length of plastochron and organ size, indicating a modulation of PLA1 and PLA2 expression could be useful to improve morphological traits.
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