2014 Fiscal Year Final Research Report
Molecular genetics of temporal regulation of leaf initiation in rice
Project/Area Number |
24380005
|
Research Category |
Grant-in-Aid for Scientific Research (B)
|
Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
Breeding science
|
Research Institution | The University of Tokyo |
Principal Investigator |
JUN-ICHI Itoh 東京大学, 農学生命科学研究科, 准教授 (30345186)
|
Project Period (FY) |
2012-04-01 – 2015-03-31
|
Keywords | イネ / 発生 / 葉原基 / 葉間期 |
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.
|
Free Research Field |
植物遺伝育種学
|