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A receptor kinase gene regulating symbiotic nodule development
Leguminous plants are able to establish a nitrogen-fixing symbiosis with soil bacteria generally known as rhizobia. Metabolites exuded by the plant root activate the production of a rhizobial signal molecule, the Nod factor, which is essential for symbiotic nodule development. This lipo-chitooligosa...
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Published in: | Nature (London) 2002-06, Vol.417 (6892), p.962-966 |
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creator | Kiss, György B Endre, Gabriella Kereszt, Attila Kevei, Zoltán Mihacea, Sorina Kaló, Péter |
description | Leguminous plants are able to establish a nitrogen-fixing symbiosis with soil bacteria generally known as rhizobia. Metabolites exuded by the plant root activate the production of a rhizobial signal molecule, the Nod factor, which is essential for symbiotic nodule development. This lipo-chitooligosaccharide signal is active at femtomolar concentrations, and its structure is correlated with host specificity of symbiosis, suggesting the involvement of a cognate perception system in the plant host. Here we describe the cloning of a gene from Medicago sativa that is essential for Nod-factor perception in alfalfa, and by genetic analogy, in the related legumes Medicago truncatula and Pisum sativum. The identified 'nodulation receptor kinase', NORK, is predicted to function in the Nod-factor perception/transduction system (the NORK system) that initiates a signal cascade leading to nodulation. The family of 'NORK extracellular-sequence-like' (NSL) genes is broadly distributed in the plant kingdom, although their biological function has not been previously ascribed. We suggest that during the evolution of symbiosis an ancestral NSL system was co-opted for transduction of an external ligand, the rhizobial Nod factor, leading to development of the symbiotic root nodule. |
doi_str_mv | 10.1038/nature00842 |
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Psychology ; Genes ; Genes, Plant - genetics ; Medicago sativa - enzymology ; Medicago sativa - genetics ; Medicago sativa - metabolism ; Medicago sativa - microbiology ; Metabolites ; Molecular Sequence Data ; Mutation - genetics ; Nitrogen Fixation ; Parasitism and symbiosis ; Perception ; Phenotype ; Plant physiology and development ; Plant Roots - enzymology ; Plant Roots - genetics ; Plant Roots - microbiology ; Protein Kinases - chemistry ; Protein Kinases - genetics ; Protein Kinases - metabolism ; Rhizobium - metabolism ; Sequence Alignment ; Symbiosis ; Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...) ; Symbiosis - genetics</subject><ispartof>Nature (London), 2002-06, Vol.417 (6892), p.962-966</ispartof><rights>2002 INIST-CNRS</rights><rights>COPYRIGHT 2002 Nature Publishing Group</rights><rights>Copyright Macmillan Journals Ltd. 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Metabolites exuded by the plant root activate the production of a rhizobial signal molecule, the Nod factor, which is essential for symbiotic nodule development. This lipo-chitooligosaccharide signal is active at femtomolar concentrations, and its structure is correlated with host specificity of symbiosis, suggesting the involvement of a cognate perception system in the plant host. Here we describe the cloning of a gene from Medicago sativa that is essential for Nod-factor perception in alfalfa, and by genetic analogy, in the related legumes Medicago truncatula and Pisum sativum. The identified 'nodulation receptor kinase', NORK, is predicted to function in the Nod-factor perception/transduction system (the NORK system) that initiates a signal cascade leading to nodulation. The family of 'NORK extracellular-sequence-like' (NSL) genes is broadly distributed in the plant kingdom, although their biological function has not been previously ascribed. We suggest that during the evolution of symbiosis an ancestral NSL system was co-opted for transduction of an external ligand, the rhizobial Nod factor, leading to development of the symbiotic root nodule.</abstract><cop>London</cop><pub>Nature Publishing</pub><pmid>12087406</pmid><doi>10.1038/nature00842</doi><tpages>5</tpages></addata></record> |
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subjects | Agronomy. Soil science and plant productions Alfalfa Amino Acid Motifs Amino Acid Sequence Arabidopsis - enzymology Arabidopsis - genetics Bacteria Biological and medical sciences Cloning Cloning, Molecular Computational Biology Economic plant physiology Fabaceae - enzymology Fabaceae - genetics Flowers & plants Fundamental and applied biological sciences. Psychology Genes Genes, Plant - genetics Medicago sativa - enzymology Medicago sativa - genetics Medicago sativa - metabolism Medicago sativa - microbiology Metabolites Molecular Sequence Data Mutation - genetics Nitrogen Fixation Parasitism and symbiosis Perception Phenotype Plant physiology and development Plant Roots - enzymology Plant Roots - genetics Plant Roots - microbiology Protein Kinases - chemistry Protein Kinases - genetics Protein Kinases - metabolism Rhizobium - metabolism Sequence Alignment Symbiosis Symbiosis (nodules, symbiotic nitrogen fixation, mycorrhiza...) Symbiosis - genetics |
title | A receptor kinase gene regulating symbiotic nodule development |
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