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Reference Work Entry In depth
Genetics and Molecular Features of Bacterial Dimethylsulfoniopropionate (DMSP) and Dimethyl Sulfide (DMS) Transformations
The transformations of dimethylsulfoniopropionate (DMSP; (CH3)2S+CH2CH2COO−) by bacterioplankton play important roles in the global sulfur cycle. This compound is produced in large quantities primarily for use as...
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Living Reference Work Entry In depth
Genetics and Molecular Features of Bacterial Dimethylsulfoniopropionate (DMSP) and Dimethyl Sulfide (DMS) Transformations
The transformations of dimethylsulfoniopropionate (DMSP; (CH3)2S+CH2CH2COO−) by bacterioplankton play important roles in the global sulfur cycle. This compound is produced in large quantities primarily for use as...
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Reference Work Entry In depth
Genetics and Molecular Features of Bacterial Dimethylsulfoniopropionate (DMSP) and Dimethylsulfide (DMS) Transformations
The transformations of dimethylsulfoniopropionate (DMSP; (CH3)2S+ CH2CH2COO−) by bacterioplankton play important roles in the global sulfur cycle. This compound is produced in large quantities primarily for use a...
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Chapter
Physiology Of Root-Nodule Bacteria
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Chapter
NodO: A Nodulation Protein That Forms Pores in Membranes
The Rhizobium leguminosarum biovar viciae nodO gene encodes a secreted protein which is involved in the nodulation of peas and vetch. In the absence of the nodE gene, mutants of R.I. by. viciae nodulate inefficie...
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Chapter
Genetic and Biochemical Studies on the Nodulation Genes of Rhizobium Leguminosarum bv. Viciae
A strain of Rhizobium leguminosarum bv viciae deleted for the nodFELMNTO genes (but retaining nodDABCIJ) is unable to nodulate vetch. The deletion mutant can be partially corrected for nodulation by plasmids carr...
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Chapter and Conference Paper
Five Genes on the Sym Plasmid of Rhizobium Legukinosarum Whose Products are Located in the Bacterial Membrane or Periplasm
Various soil bacteria, collectively termed the rhizobia, can recognise specific leguminous plants and engage in a process in which the bacteria elicit a series of complex changes in the hosts and in which the ...
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Article
Analysis of pss genes of Rhizobium leguminosarum required for exopolysaccharide synthesis and nodulation of peas: Their primary structure and their interaction with psi and other nodulation genes
Strains of Rhizobium leguminosarum (R. l.) biovar viciae containing pss mutations fail to make the acidic exopolysaccharides (EPS) and are unable to nodulate peas. It was found that they also failed to nodulate V...
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Chapter
Two Classes of Rhizobiuk Geies Required for the Nodulation of Legumes
Two different classes of genes in the bacterium Rhizobium leguminosarum biovar viciae, both of which are essential for the nodulation of its host legumes were identified. One group of genes is on ...
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Article
Sequence of psi, a gene on the symbiotic plasmid of Rbizobium phaseoli which inhibits exopolysaccharide synthesis and nodulation and demonstration that its transcription is inhibited by psr, another gene on the symbiotic plasmid
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Article
Identification of two classes of Rhizobium phaseoli genes required for melanin synthesis, one of which is required for nitrogen fixation and activates the transcription of the other
The symbiotic plasmid pRP2JI of Rhizobium phaseoli strain 8002 was shown to contain two separate regions of DNA which are required and sufficient for the synthesis of the pigment melanin. One of these regions con...
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Article
Sequence of psi, a gene on the symbiotic plasmid of Rhizobium phaseoli which inhibits exopolysaccharide synthesis and nodulation and demonstration that its transcription is inhibited by psr, another gene on the symbiotic plasmid
A gene termed psi (polysaccharide inhibition), located close to the nodulation genes of the Rhizobium phaseoli symbiotic plasmid pRP2JI inhibited exopolysaccharide synthesis (EPS) and nodulation ability (Nod) in
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Chapter
Nodulation Genes of Rhizobium Leguminosarum
The host specific nodulation of peas, Vicia, Lens and Lathyrus is encoded by a series of genes present upon the “symbiotic” plasmids of Rhizobium leguminosarum. These genes are clustered within a relatively short...
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Chapter
Analysis of Three Rhizobium phaseoli Genes, psi, psr and pss, Which Affect Exopolysaccharide Synthesis and Symbiotic Nitrogen Fixation and/or Nodulat Ion
In R. phaseoli, as in other species of fast-growing Rhizobium spp, genes required for nodulation and nitrogen fixation are on large ‘symbiotic’ plasmids (Lamb et al. 1982). Although such plasmids are not required...
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Article
Flavonoid activation of nodulation genes in Rhizobium reversed by other compounds present in plants
Bacteria of the genus Rhizobium specifically recognize and infect legume plants, resulting in a complex morphological and bio-chemical differentiation into nitrogen-fixing root nodules. In R. leguminosarum, whose...
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Article
A mutation that blocks exopolysaccharide synthesis prevents nodulation of peas by Rhizobium leguminosarum but not of beans by R. phaseoli and is corrected by cloned DNA from Rhizobium or the phytopathogen Xanthomonas
A Tn5-induced mutant strain of R. phaseoli which failed to synthesize exopolysaccharide (EPS) was isolated and was shown to induce normal nitrogen-fixing nodules on Phaseolus beans, the host of this Rhizobium spe...
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Chapter and Conference Paper
Induction of Rhizobium Leguminosarum Nod Genes by Flavonoids is Antagonized by Other Plant-Specified Aromatic Compounds
Chromatographic and chemical analyses indicated that the compounds present in peas which activated nodD-dependent transcription of the R. leguminosarum nodFE and nodABCIJ operons were flavonoids. ...
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Article
Identification of the host-range DNA which allows Rhizobium leguminosarum strain TOM to nodulate cv. Afghanistan peas
The special ability of Rhizobium leguminosarum strain TOM to nodulate cv. Afghanistan peas had previously been shown to be determined by the symbiotic plasmid, pRL5JI, of this strain. A region of pRL5JI, 2.0 kb i...
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Article
psi, a plasmid-linked Rhizobium phaseoli gene that inhibits exopolysaccharide production and which is required for symbiotic nitrogen fixation
A strain of R. phaseoli cured of its symbiotic plasmid, pRP2JI, retained the ability to make exopolysaccharide (EPS). However, a region of pRP2JI, when cloned at an increased copy number in wide host-range vector...
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Article
Identification of genes and gene products involved in the nodulation of peas by Rhizobium leguminosarum
Mutant strains of Rhizobium leguminosarum have been isolated in which the transposon Tn5 was inserted into the cloned nodulation genes. The mutant strains were examined for their ability to induce nodules and to ...
