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Article

Nodule formation in soybeans by exopolysaccharide mutants of Rhizobium fredii USDA 191.

Journal of general microbiology - 1 Jan 1990

Ko Y H, Gayda R

Abstract excerpt

Production of exopolysaccharides by Rhizobium has been linked with efficient invasion and nodulation of leguminous plant roots by the bacteria. Exopolysaccharide-deficient (exo) mutants of Rhizobium fredii USDA 191 were isolated following Tn5-insertion mutagenesis. Five phenotypically unique exo mutants were investigated for exopolysaccharide synthesis and their ability to nodulate soybeans. The...

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Identifiers

PMID: 2351951
DOI: 10.1099/00221287-136-1-105

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 7 Sept 2026. Manifest publication-graph-cohort-2026-09-08.1.

Source receipt: pubmed, retrieved 7 Sept 2026.

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Nodule formation in soybeans by exopolysaccharide mutants of Rhizobium fredii USDA 191.PMID 2351951Read ↗

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The Sinorhizobium fredii HH103 lipopolysaccharide is not only relevant at early soybean nodulation stages but also for symbiosome stability in mature nodules.Semantic proximity Read ↗

A Peptidoglycan-Remodeling Enzyme Is Critical for Bacteroid Differentiation in Bradyrhizobium spp. During Legume Symbiosis.Semantic proximity Read ↗

Structure and biological roles of Sinorhizobium fredii HH103 exopolysaccharide.Semantic proximity Read ↗

Exo-oligosaccharides of Rhizobium sp. strain NGR234 are required for symbiosis with various legumes.Semantic proximity Read ↗

Exopolysaccharide mutants of Rhizobium loti are fully effective on a determinate nodulating host but are ineffective on an indeterminate nodulating host.Semantic proximity Read ↗

nodD alleles of Sinorhizobium fredii USDA191 differentially influence soybean nodulation, nodC expression, and production of exopolysaccharides.Semantic proximity Read ↗

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

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

Exopolysaccharide is detrimental for the symbiotic performance of Sinorhizobium fredii HH103 mutants with a truncated lipopolysaccharide core.Semantic proximity Read ↗

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