根瘤菌属野油菜中华根瘤菌 BLY3-8 III 型分泌系统突变体克服了 Rj 基因型大豆的结瘤限制。
Mutants Disrupted in the Type III Secretion System of Bradyrhizobium elkanii BLY3-8 Overcame Nodulation Restriction by Rj-genotype Soybean.
机构信息
Graduate School of Agricultural Science, Kagoshima University.
Department of Agronomy, Yezin Agricultural University.
出版信息
Microbes Environ. 2020;35(2). doi: 10.1264/jsme2.ME19151.
Bradyrhizobium elkanii BLY3-8 does not form nodules on the roots of Rj-genotype soybean (cultivar D-51). This is a cultivar-specific nodulation restriction. The genes A6X20_40975 and A6X20_41030 in strain BLY3-8 were predicted to encode the transcriptional activator and apparatus of the type III secretion system (T3SS) (the proteins TtsI and RhcJ), respectively. Mutants disrupted in these genes overcame the nodulation restriction. These results suggest that an effector injected via T3SS into Rj-genotype soybean is involved in nodulation restriction by Rj-genotype soybean.
慢生根瘤菌 BLY3-8 不能在 Rj 基因型大豆（品种 D-51）的根上形成根瘤。这是一种品种特异性的结瘤限制。菌株 BLY3-8 中的基因 A6X20_40975 和 A6X20_41030 分别预测编码转录激活因子和 III 型分泌系统（T3SS）装置（TtsI 和 RhcJ 蛋白）。这些基因缺失突变体克服了结瘤限制。这些结果表明，通过 T3SS 注射到 Rj 基因型大豆中的效应子参与了 Rj 基因型大豆的结瘤限制。
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