1887

Abstract

Abstract

A new species that nodulates L. is proposed on the basis of a sequence analysis of 16S ribosomal DNA. This taxon, sp. nov., was previously named biovar phaseoli (type I strains) and is characterized by the capacity to establish an effective symbiosis with bean plants, the reiteration of the nitrogenase structural genes, the organization of the common nodulation genes into two separate transcriptional units bearing and , the presence of the polysaccharide inhibition gene, , and the 16S ribosomal DNA sequence. An analysis of the sequence of a fragment of the 16S rRNA gene shows that this gene is quite different from the gene of In addition, all strains have identical sequences. We describe these analyses and discuss additional evidence supporting our proposal.

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1993-04-01
2024-05-25
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