Compounds Exuded by Phaseolus vulgaris That Induce a Modification of Rhizobium etli Lipopolysaccharide
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چکیده
منابع مشابه
Inhibition of Rhizobium etli Polysaccharide Mutants by Phaseolus vulgaris Root Compounds.
Crude bean root extracts of Phaseolus vulgaris were tested for inhibition of the growth of several polysaccharide mutants of Rhizobium etli biovar phaseoli CE3. Mutants deficient only in exopolysaccharide and some mutants deficient only in the O-antigen of the lipopolysaccharide were no more sensitive than the wild-type strain to the extracts, whereas mutants defective in both lipopolysaccharid...
متن کاملCharacterization of a Rhizobium etli chromosomal gene required for nodule development on Phaseolus vulgaris L.
A chromosomal gene, required for nodule development on Phaseolus bean, was characterized from Rhizobium etli strain TAL182. MLC640 is a Tn5 insertion mutant of TAL182 which shows decreased motility in soft TY agar and is defective in nodule development. The site of Tn5 insertion in MLC640 mapped to a 3.6-kb EcoRI chromosomal fragment. The 3.6-kb fragment was subcloned from the cosmid pUHR80 whi...
متن کاملEffective symbiosis between Rhizobium etli and Phaseolus vulgaris requires the alarmone ppGpp.
The symbiotic interaction between Rhizobium etli and Phaseolus vulgaris, the common bean plant, ultimately results in the formation of nitrogen-fixing nodules. Many aspects of the intermediate and late stages of this interaction are still poorly understood. The R. etli relA gene was identified through a genome-wide screening for R. etli symbiotic mutants. RelA has a pivotal role in cellular phy...
متن کاملRhizobium etli and Rhizobium gallicum Nodulate Phaseolus vulgaris in Egyptian Soils and Display Cultivar-Dependent Symbiotic Efficiency
Twelve rhizobial isolates were recovered from nodules of common bean (Phaseolus vulgaris) grown in two different locations of Egyptian soils. The most effective strains for nodule formation and nitrogen fixation were selected. Strain specificity with the bean cultivars Saxa, Canoca and Giza 6 from Germany, Colombia and Egypt were studied. The strains were characterized by amplified rDNA restric...
متن کاملIdentification of a plasmid-borne locus in Rhizobium etli KIM5s involved in lipopolysaccharide O-chain biosynthesis and nodulation of Phaseolus vulgaris.
Screening of derivatives of Rhizobium etli KIM5s randomly mutagenized with mTn5SSgusA30 resulted in the identification of strain KIM-G1. Its rough colony appearance, flocculation in liquid culture, and Ndv(-) Fix(-) phenotype were indicative of a lipopolysaccharide (LPS) defect. Electrophoretic analysis of cell-associated polysaccharides showed that KIM-G1 produces only rough LPS. Composition a...
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ژورنال
عنوان ژورنال: Molecular Plant-Microbe Interactions®
سال: 1997
ISSN: 0894-0282,1943-7706
DOI: 10.1094/mpmi.1997.10.7.903