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Article

Rhizobium meliloti chromosomal loci required for suppression of exopolysaccharide mutations by lipopolysaccharide.

Journal of bacteriology - 1 Nov 1990

Williams M N, Hollingsworth R I, Brzoska P M, Signer E R

Abstract excerpt

Mutants of alfalfa symbiont Rhizobium meliloti SU47 that fail to make extracellular polysaccharide (exo mutants) induce the formation of nodules that are devoid of bacteria and consequently do not fix nitrogen. This Fix- phenotype can be suppressed by an R. meliloti Rm41 gene that affects lipopolysaccharide structure. Here we describe mutations preventing suppression that map at two new chromosomal loci, lpsY and...

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Methodology Data sources Editorial policy Privacy Delete account & data About Contact Helena Bioinformatics

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Identifiers

PMID: 2228976
DOI: 10.1128/jb.172.11.6596-6598.1990
PMCID: PMC526852

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Source receipt: pubmed, retrieved 7 Sept 2026.

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Rhizobium meliloti chromosomal loci required for suppression of exopolysaccharide mutations by lipopolysaccharide.PMID 2228976Read ↗

The symbiotic defect of Rhizobium meliloti exopolysaccharide mutants is suppressed by lpsZ+, a gene involved in lipopolysaccharide biosynthesis.Semantic proximity Read ↗

The regulation of exopolysaccharide production is important at two levels of nodule development in Rhizobium meliloti.Semantic proximity Read ↗

Rhizobium meliloti lipopolysaccharide and exopolysaccharide can have the same function in the plant-bacterium interaction.Semantic proximity Read ↗

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Exogenous suppression of the symbiotic deficiencies of Rhizobium meliloti exo mutants.Semantic proximity Read ↗

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Chronic intracellular infection of alfalfa nodules by Sinorhizobium meliloti requires correct lipopolysaccharide core.Semantic proximity Read ↗

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Rhizobium meliloti exoG and exoJ mutations affect the exoX-exoY system for modulation of exopolysaccharide production.Semantic proximity Read ↗

The exoD gene of Rhizobium meliloti encodes a novel function needed for alfalfa nodule invasion.Semantic proximity Read ↗

Suppression of the Fix- phenotype of Rhizobium meliloti exoB mutants by lpsZ is correlated to a modified expression of the K polysaccharide.Semantic proximity Read ↗

Suppression of the ndv mutant phenotype of Rhizobium meliloti by cloned exo genes.Semantic proximity Read ↗

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