Involvement of the syrM and nodD3 genes of Rhizobium meliloti in nod gene activation and in optimal nodulation of the plant host.

Abstract

We identified and sequenced the regulatory syrM and nodD3 genes of Rhizobium meliloti 41. Both genes were shown to contribute to optimal nodulation of alfalfa. In R. meliloti strains carrying syrM and nodD3 on plasmid, the nod genes are expressed constitutively, resulting in host-range extension to siratro. This is due to the presence of multiple syrM… (More)

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