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Prevalence of the Rhizobium etli-Like Allele in Genes Coding for 16S rRNA among the Indigenous Rhizobial Populations Found Associated with Wild Beans from the Southern Andes in Argentina
ABSTRACT A collection of rhizobial isolates from nodules of wild beans,Phaseolus vulgaris var. aborigineus, found growing in virgin lands in 17 geographically separate sites in northwest ArgentinaExpand
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A Rhizobium meliloti lipopolysaccharide mutant altered in competitiveness for nodulation of alfalfa.
A transposon Tn5-induced mutant of Rhizobium meliloti Rm2011, designated Rm6963, showed a rough colony morphology on rich and minimal media and an altered lipopolysaccharide (LPS). Major differencesExpand
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Adsorption ofRhizobium meliloti to alfalfa roots: Dependence on divalent cations and pH
Adsorption ofRhizobium meliloti L5-30 in low numbers to alfalfa (Medicago sativa L.) roots was dependent on the presence of divalent cations, and required neutral pH. Adsorption was proportional toExpand
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Role of Motility and Chemotaxis in Efficiency of Nodulation by Rhizobium meliloti.
Spontaneous mutants of Rhizobium meliloti L5-30 defective in motility or chemotaxis were isolated and compared against the parent with respect to symbiotic competence. Each of the mutants was able toExpand
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Stimulation of adhesiveness, infectivity, and competitiveness for nodulation of Bradyrhizobium japonicum by its pretreatment with soybean seed lectin.
Soybean seed lectin stimulates adsorption of Bradyrhizobium japonicum to its host roots. Pretreatment of the rhizobia with soybean seed lectin for at least 6-12 h previous to their interaction withExpand
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Quantitation of adsorption of rhizobia in low numbers to small legume roots.
Bacteria adsorbed in low numbers to alfalfa or clover root surfaces were counted after incubation of seedlings in mineral solution with very dilute inocula (less than 10 bacteria per ml) of anExpand
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Early recognition in the Rhizobium meliloti-alfalfa symbiosis: root exudate factor stimulates root adsorption of homologous rhizobia.
Adsorption of Rhizobium meliloti to alfalfa roots before their infection and nodule formation shows the specificity of the symbiotic association (G. Caetano-Anollés and G. Favelukes, Appl. Environ.Expand
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Improved soybean root association of N-starved Bradyrhizobium japonicum.
In this study, we addressed the effects of N limitation in Bradyrhizobium japonicum for its association with soybean roots. The wild-type strain LP 3001 grew for six generations with a growth rate ofExpand
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Rhizobial position as a main determinant in the problem of competition for nodulation in soybean.
Selected Bradyrhizobium japonicum strains inoculated on soybean seeds often fail to occupy a significant proportion of nodules when a competitor rhizobial population is established in the soil. ThisExpand
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Early interactions of Bradyrhizobium japonicum and soybean roots: specificity in the process of adsorption
Abstract Specificity in the process of adsorption of Bradyrhizobium japonicum to soybean roots (Glycine max (L.) Merr.) was studied with a standardized procedure that quantifies adsorbed rhizobia toExpand
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