土壌適応因子としてのダイズ根粒菌種の脱窒システム

共培养实验表明，B.日本血吸虫的竞争力低于B。在低氧条件下，NapC的Heam染色和NapA的免疫印迹分析也表明B中的Nap水平较低。而在B.重氮效率在低氧条件下，在硝酸盐的存在下，作为B的缺点的可能原因。山茱萸此外，FixP和FixO蛋白（cbb3型高亲和力细胞色素氧化酶的一部分）的较低产量可能与B的无能有关。以产生足够水平的Nap。这些结果支持了我以前的观察，硝酸盐还原能力可能是一个重要因素驱动的分布反应，土壤氧气条件下的慢生根瘤菌。

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.