2011 Fiscal Year Final Research Report
Analysis of the endophytic nitrogen fixation of bradyrhizobia in sweet potato.
| Project/Area Number |
21580081
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Plant nutrition/Soil science
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| Research Institution | National Agriculture and Food Research Organization |
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Principal Investigator |
OHWAKI Yoshinari 独立行政法人農業・食品産業技術総合研究機構, 中央農業総合研究センター土壌肥料研究領域, 主任研究員 (60355542)
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| Project Period (FY) |
2009 – 2011
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| Keywords | サツマイモ / エンドファイト / 窒素固定 / Bradyrhizobium属細菌 |
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| Research Abstract |
Endophytic diazotrophs isolated from sweet potato were characterized. The isolated Bradyrhizobium showed acetylene reduction activity in the medium containing carboxylic acids as the carbon source under micro-aerobic conditions. Colonization in the stems after inoculation of the Bradyrhizobium to the roots was observed in sweet potatoes. These results suggested that the Bradyrhizobium endophyte can express nitrogenase activity in the microsites with low oxygen tension in plants.
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