BACKGROUND Rhizobium leguminosarum bv. viciae mutants unable to transport branched-chain amino acids via the two main amino acid ABC transport complexes AapJQMP and BraDEFGC produce a nitrogen starvation phenotype when inoculated on pea (Pisum sativum) plants [1], [2]. Bacteroids in indeterminate pea nodules have reduced abundance and a lower chromosome number. They reduce transcription of path...

The patterns of O-acetylation of the exopolysaccharide (EPS) from the Sym plasmid-cured derivatives of Rhizobium leguminosarum bv. trifolii strain LPR5, R. leguminosarum bv. trifolii strain ANU843 and R. leguminosarum bv. viciae strain 248 were determined by 1H and 13C NMR spectroscopy. Beside a site indicative of the chromosomal background, these strains have one site of O-acetylation in commo...

Flavonoids in root exudate of leguminous plants activate the transcription of Rhizobium genes involved in the formation of root nodules (nod genes). We report that inoculation with the homologous symbiont R. leguminosarum bv. viciae results in an increased nod gene-inducing activity (Ini) in root exudate of V. sativa subsp. nigra, whereas inoculation with heterologous Rhizobium strains results ...

Bernhard Epping, Alexander P. Hansen and Peter Martin Institut für Pflanzenernährung (330), Fruwirthstr. 20, Universität Hohenheim, 70593 Stuttgart, Bundesrepublik Deutschland Z. Naturforsch. 50 c, 543-551 (1995); received March 15/May 2, 1995 Oxygen Derivates, Phaseolus vulgaris L.. Rhizobium leguminosarum, Rhizobium tropici, Symbiotic Effectivity Nodules of Rhizobium leguminosarum bv. phaseol...

A quantitative method was developed to measure the binding of fluorescent-labeled lentil (Lens esculenta Moench), pea (Pisum sativum L.), broad bean (Vicia faba L.), and jackbean (Canavalia ensiformis L., DC.) lectins to various Rhizobium strains. Lentil lectin bound to three of the five Rhizobium leguminosarum strains tested. The number of lentil lectin molecules bound per R. leguminosarum 128...