2011 Fiscal Year Final Research Report
Photo-thermal responses of rice panicle initiation and their modeling
| Project/Area Number |
21380152
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Agricultural environmental engineering
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| Research Institution | Iwate University |
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Principal Investigator |
OKADA Masumi 岩手大学, 農学部, 教授 (10355274)
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| Co-Investigator(Kenkyū-buntansha) |
SAMESHIMA Ryoji 農業・食品産業技術総合研究機構, 東北農業研究センター, 上席研究員 (70355452)
SHIMONO Hiroyuki 岩手大学, 農学部, 准教授 (70451490)
YOKOI Shuji 岩手大学, 農学部, 准教授 (80346311)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 発生・分化 / イネ / 日長感応 / 基本栄養生長 / 花成促進因子 |
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| Research Abstract |
The time of flower evolution of rice was analyzed by observing panicle initiation in the experiments where water temperature and day length were controlled. We obtained the following new important findings ; 1) photoperiod sensitivity was initiated simply by the number of days from germination and not related to a leaf age, 2) the decrease of day length promoted panicle initiation even under long day conditions, 3) the expression of flowering activator Hd3a was concurrently increased by the decrease of day length and 4) air temperature affected possibly panicle initiation after inductive short day treatment.
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