2013 Fiscal Year Final Research Report
Regulation of root nodule formation by control of light quality and its application for legume production
| Project/Area Number |
24658020
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Crop science/Weed science
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| Research Institution | Saga University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
ARIMA Susumu 佐賀大学, 農学部, 教授 (90140954)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Keywords | ダイズ / 根粒 / 根粒菌 / 窒素固定 / 共生 / 子実生産 / 収量 |
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| Research Abstract |
Light is critical for supplying carbon to the energetically expensive, nitrogen-fixing symbiosis between legumes and rhizobia. I have already showed that root nodule formation is photomorphogenetically controlled by sensing the red/far red (R/FR) ratio through JA signaling. In this study, I found that condition of light treatment for increase of the number of root nodule of soybean. As expected, when three day-old soybean plants were treated by FR for 3 weeks, root nodule number was significantly decreased compared with non-treated control plants. However, root nodule number was significantly increased by 3 weeks FR treatment plus 4 weeks natural sunlight treatment compared with non-treated soybean. If this light treatment is applied for soybean production, there is a possibility that soybean yield increase due to the enhancement of root nodule nitrogen fixation by the symbiosis with Bradyrhizobium japonicum.
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