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近来年,对根瘤菌结瘤基因启动子的研究十分活跃,已发现在NodD蛋白存在时,结瘤基因启动子受宿主豆科植物分泌的类黄酮类物质诱导,使下游结瘤基因转录.这类启动子在结构上相当保守,大都含有“nod box”.已经报道在Azorhizobium caulinodans ORS571中存在与根瘤菌中nodABC相似的nod
In recent years, research on the rhizobium nodulation gene promoter has been very active and it has been found that the nodulation gene promoter is induced by the flavonoid secreted by the host legume in the presence of NodD protein to transcribe the downstream nodulation gene. Like promoters are fairly structurally conserved and contain mostly “nod box.” It has been reported that there is a nod similar to nodABC in rhizobia in Azorhizobium caulinodans ORS571