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Rhizobium species NGR234 host-specificity of nodulation locus III contains nod- and fix-genes

Authors
Reuhs, B.
Carlson, R.W.
Freiberg, C.
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Published in Stacy, Gary; Mullin, Beth & Gresshoff, Peter M. Biology of plant-microbe interactions: proceedings of the 8th International Symposium on Molecular Plant-Microbe Interactions. Knoxville - July 14-19, 1996 - St. Paul: International Society for Molecular Plant-Microbe Interactions. 1996, p. 319-324
Abstract Most nodulatlon genes of the broad host-range Rhizobium sp. NGR234 are located on the 536 kb symbiotic plasmid. Complete sequencing of the replicon revealed over 400 open-reading frames (ORF), many of which correspond to known genes. Combined physical/genetic analysis of the host specificity of nodulation (hsn) locus lll revealed many nodulation genes, some of which are essential for Nod-factor production (nodABQ and others which modify the Nod-factor structure in specific ways (noeE). When mutated, two other genes, ORF3 and fixF gave Fix⁻ phenotypes on Vigna unguiculata. fixF has a nuclear localisation sequence (NLS) which is functional in nuclear targeting in tobacco protoplasts. Mutations in fixF abolish production of a novel, rhamnose-rich lipopolysaccharide that is produced under conditions of flavonoid induction.
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ISBN: 0965462501
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JABBOURI, Said et al. Rhizobium species NGR234 host-specificity of nodulation locus III contains nod- and fix-genes. In: Stacy, Gary; Mullin, Beth & Gresshoff, Peter M. (Ed.). Biology of plant-microbe interactions: proceedings of the 8th International Symposium on Molecular Plant-Microbe Interactions. Knoxville. St. Paul : International Society for Molecular Plant-Microbe Interactions, 1996. p. 319-324. https://archive-ouverte.unige.ch/unige:113185

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