Recombinant Nodulation Plasmids in Rhizobium leguminosarum
نویسندگان
چکیده
منابع مشابه
Rhizobium leguminosarum genes involved in early stages of nodulation.
Nodulation genes from Rhizobium leguminosarum have been subcloned and transferred to a strain of R. phaseoli with its symbiotic plasmid deleted (and therefore its nodulation and nitrogen fixation genes). Normal infection and nodule development occurred when these strains were added to the roots of Pisum sativum (peas) and Vicia hirsuta. The pea nodules were examined by electron microscopy; bact...
متن کاملInvestigation of myo-inositol catabolism in Rhizobium leguminosarum bv. viciae and its effect on nodulation competitiveness.
Three discrete loci required for growth on myo-inositol in Rhizobium leguminosarum bv. viciae have been characterized. Two of these are catabolic loci that code for malonate semialdehyde dehydrogenase (iolA) and malonate semialdehyde dehydrogenase (iolD). IolD is part of a possible operon, iolDEB, although the functions of IolE and IolB are unknown. The third locus, int, codes for an ABC transp...
متن کاملLight regulates attachment, exopolysaccharide production, and nodulation in Rhizobium leguminosarum through a LOV-histidine kinase photoreceptor.
Rhizobium leguminosarum is a soil bacterium that infects root hairs and induces the formation of nitrogen-fixing nodules on leguminous plants. Light, oxygen, and voltage (LOV)-domain proteins are blue-light receptors found in higher plants and many algae, fungi, and bacteria. The genome of R. leguminosarum bv. viciae 3841, a pea-nodulating endosymbiont, encodes a sensor histidine kinase contain...
متن کاملSecretion of the Rhizobium leguminosarum nodulation protein NodO by haemolysin-type systems.
The Rhizobium leguminosarum biovar viciae nodulation protein NodO is partially homologous to haemolysin of Escherichia coli and, like haemolysin, is secreted into the growth medium. The NodO protein can be secreted by a strain of E. coli carrying the cloned nodO gene plus the haemolysin secretion genes hlyBD, in a process that also requires the outer membrane protein encoded by tolC. The relate...
متن کاملChemotaxis of Rhizobium leguminosarum biovar phaseoli towards Flavonoid Inducers of the Symbiotic Nodulation Genes
Chemotaxis of Rhizobium leguminosarum biovar phaseoli RP8002 towards a range of carbohydrates, phenolic compounds and flavonoids was assayed. Xylose (peak response M) were strong chemoattractants amongst the carbohydrates, whilst glucose, fructose, galactose and maltose produced little or no detectable response. Of the monocyclic phenolic compounds, vanillyl alcohol, p-hydroxybenzoic acid (both...
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ژورنال
عنوان ژورنال: Microbiology
سال: 1982
ISSN: 1350-0872,1465-2080
DOI: 10.1099/00221287-128-8-1817