2018 Fiscal Year Annual Research Report
Project/Area Number |
17J04057
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Research Institution | Tohoku University |
Principal Investigator |
FERNANDES SIQUEIRA Arthur 東北大学, 生命科学研究科, 特別研究員(PD)
|
Project Period (FY) |
2017-04-26 – 2019-03-31
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Keywords | Bradyrhizobium / Denitrification / Anaerobiosis / Competitiveness / cbb3 oxidase |
Outline of Annual Research Achievements |
In the present research, co-culture experiments showed that B. japonicum is less competitive than B. diazoefficiens under low oxigen contidions. Also the heam staining of NapC and immunoblotting analysis of NapA indicated lower levels of Nap in B. japonicum than in B. diazoefficiens under low-oxygen conditions, in the presence of nitrate, as a possible reason for the disadvantage of B. japonicum. Also, the lower production of FixP and FixO protein (part of cbb3-type high-affinity cytochrome oxidase) may be related to the inability of B. japonicum to produce Nap in sufficient levels. These results support my previous observation that nitrate reduction capacity may be an important factor driving the distribution of bradyrhizobia in response to soil oxygen conditions.
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Research Progress Status |
平成30年度が最終年度であるため、記入しない。
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Strategy for Future Research Activity |
平成30年度が最終年度であるため、記入しない。
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Research Products
(3 results)