Specific phases of root hair attachment in the Rhizobium trifolii-clover symbiosis
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چکیده
منابع مشابه
Root Hair Deformations Associated with Fractionated Extracts from Rhizobium trifolii.
Components from culture fluid and whole cells of Rhizobium trifolii were examined for effects on root hair morphology of white clover seedlings (Trifolium repens var. Ladino). Cell-free culture fluid, exopolysaccharides, supernatant fluid from the precipitation of the exopolysaccharides, capsular polysaccharides, lipopolysaccharides, and a protein fraction from culture fluids were assayed for m...
متن کاملRhizobium attachment to clover roots.
The adhesion of rhizobia to surfaces of clover roots was examined by an indirect plate-counting assay and phase-contrast microscopy. The number of Rhizobium trifolii cells attached to clover root segments increased in approximately linear fashion during the first hour of incubation, but did not change appreciably thereafter. The addition of 30 mM-2-deoxy-D-glucose, which effectively inhibits bi...
متن کاملThe Regulatory Protein RosR Affects Rhizobium leguminosarum bv. trifolii Protein Profiles, Cell Surface Properties, and Symbiosis with Clover
Rhizobium leguminosarum bv. trifolii is capable of establishing a symbiotic relationship with plants from the genus Trifolium. Previously, a regulatory protein encoded by rosR was identified and characterized in this bacterium. RosR possesses a Cys2-His2-type zinc finger motif and belongs to Ros/MucR family of rhizobial transcriptional regulators. Transcriptome profiling of the rosR mutant reve...
متن کاملRegulation by fixed nitrogen of host-symbiont recognition in the Rhizobium-clover symbiosis.
Either NO(3) (-) (16 millimolar) or NH(4) (+) (1 millimolar) completely inhibited infection and nodulation of white clover seedlings (Trifoliin repens) inoculated with Rhizobium trifolii. The binding of R. trifolii to root hairs and the immunologically detectable levels of the plant lectin, trifoliin, on the root hair surface had parallel declining slopes as the concentration of either NO(3) (-...
متن کاملMutant strains of clover rhizobium (Rhizobium trifolii) that form nodules on soybean (Glycine max).
Mutant strains of Rhizobium trifolii that induce nitrogenase activity in the free-living state were isolated. These strains, unlike the wild type, nodulated soybean and mungbean plants, producing effective nodules. One of the strains, strain DT72, also nodulated clover but the nodules were ineffective. Strain DT125 consumed hydrogen gas from the gas phase, which can be coupled to nitrogenase ac...
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ژورنال
عنوان ژورنال: Applied and Environmental Microbiology
سال: 1984
ISSN: 0099-2240,1098-5336
DOI: 10.1128/aem.48.6.1140-1150.1984