Source:http://linkedlifedata.com/resource/pubmed/id/21205029
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
6
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| pubmed:dateCreated |
2011-3-22
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| pubmed:abstractText |
Plant responses to wounding are part of their defense responses against insects, and are tightly regulated. The isoleucin conjugate of jasmonic acid (JA-Ile) is a major regulatory molecule. We have previously shown that inositol polyphosphate signals are required for defense responses in Arabidopsis; however, the way in which inositol polyphosphates contribute to plant responses to wounding has so far remained unclear. Arabidopsis F-box proteins involved in the perception of JA-Ile (COI1) and auxin (TIR1) are structurally similar. Because TIR1 has recently been shown to contain inositol hexakisphosphate (InsP?) as a co-factor of unknown function, here we explored the possibility that InsP? or another inositol polyphosphate is required for COI1 function. In support of this hypothesis, COI1 variants with changes in putative inositol polyphosphate coordinating residues exhibited a reduced interaction with the COI1 target, JAZ9, in yeast two-hybrid tests. The equivalent COI1 variants displayed a reduced capability to rescue jasmonate-mediated root growth inhibition or silique development in Arabidopsis coi1 mutants. Yeast two-hybrid tests using wild-type COI1 in an ipk1? yeast strain exhibiting increased levels of inositol pentakisphosphate (InsP?) and reduced levels of InsP? indicate an enhanced COI1/JAZ9 interaction. Consistent with these findings, Arabidopsis ipk1-1 mutants, also with increased InsP? and reduced InsP? levels, showed increased defensive capabilities via COI1-mediated processes, including wound-induced gene expression, defense against caterpillars or root growth inhibition by jasmonate. The combined data from experiments using mutated COI1 variants, as well as yeast and Arabidopsis backgrounds altered in inositol polyphosphate metabolism, indicate that an inositol polyphosphate, and probably InsP?, contributes to COI1 function.
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:citationSubset |
IM
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| pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Arabidopsis Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/COI1 protein, Arabidopsis,
http://linkedlifedata.com/resource/pubmed/chemical/Cyclopentanes,
http://linkedlifedata.com/resource/pubmed/chemical/DNA, Plant,
http://linkedlifedata.com/resource/pubmed/chemical/F-Box Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Inositol Phosphates,
http://linkedlifedata.com/resource/pubmed/chemical/Oxylipins,
http://linkedlifedata.com/resource/pubmed/chemical/Phosphotransferases (Alcohol Group...,
http://linkedlifedata.com/resource/pubmed/chemical/Phytic Acid,
http://linkedlifedata.com/resource/pubmed/chemical/Receptors, Cell Surface,
http://linkedlifedata.com/resource/pubmed/chemical/TIR1 protein, Arabidopsis,
http://linkedlifedata.com/resource/pubmed/chemical/inositol...,
http://linkedlifedata.com/resource/pubmed/chemical/inositol pentaphosphate,
http://linkedlifedata.com/resource/pubmed/chemical/jasmonic acid
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| pubmed:status |
MEDLINE
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| pubmed:month |
Mar
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| pubmed:issn |
1365-313X
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| pubmed:author | |
| pubmed:copyrightInfo |
© 2011 The Authors. The Plant Journal © 2011 Blackwell Publishing Ltd.
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| pubmed:issnType |
Electronic
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| pubmed:volume |
65
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
949-57
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| pubmed:meshHeading |
pubmed-meshheading:21205029-Amino Acid Sequence,
pubmed-meshheading:21205029-Arabidopsis,
pubmed-meshheading:21205029-Arabidopsis Proteins,
pubmed-meshheading:21205029-Base Sequence,
pubmed-meshheading:21205029-Binding Sites,
pubmed-meshheading:21205029-Cyclopentanes,
pubmed-meshheading:21205029-DNA, Plant,
pubmed-meshheading:21205029-F-Box Proteins,
pubmed-meshheading:21205029-Genes, Plant,
pubmed-meshheading:21205029-Inositol Phosphates,
pubmed-meshheading:21205029-Molecular Sequence Data,
pubmed-meshheading:21205029-Mutagenesis, Site-Directed,
pubmed-meshheading:21205029-Mutation,
pubmed-meshheading:21205029-Oxylipins,
pubmed-meshheading:21205029-Phosphotransferases (Alcohol Group Acceptor),
pubmed-meshheading:21205029-Phytic Acid,
pubmed-meshheading:21205029-Plants, Genetically Modified,
pubmed-meshheading:21205029-Receptors, Cell Surface,
pubmed-meshheading:21205029-Sequence Homology, Amino Acid,
pubmed-meshheading:21205029-Two-Hybrid System Techniques
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| pubmed:year |
2011
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| pubmed:articleTitle |
Jasmonic acid perception by COI1 involves inositol polyphosphates in Arabidopsis thaliana.
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| pubmed:affiliation |
Department of Plant Biochemistry, Albrecht-von-Haller-Institute for Plant Sciences, Georg-August-University Göttingen, Justus-von-Liebig-Weg 11, 37077 Göttingen, Germany.
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| pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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