The 7B-1 mutation in tomato (Solanum lycopersicum L.) confers a blue light-specific lower sensitivity to coronatine, a toxin produced by Pseudomonas syringae pv. tomato
Language English Country Great Britain, England Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
19213807
DOI
10.1093/jxb/ern366
PII: ern366
Knihovny.cz E-resources
- MeSH
- Amino Acids pharmacology MeSH
- Anthocyanins metabolism MeSH
- Bacterial Toxins pharmacology MeSH
- Models, Biological MeSH
- Cyclopentanes metabolism MeSH
- Indenes pharmacology MeSH
- Abscisic Acid metabolism MeSH
- Plant Leaves drug effects microbiology radiation effects MeSH
- Mutation genetics MeSH
- Plant Diseases microbiology MeSH
- Oxylipins metabolism MeSH
- Reverse Transcriptase Polymerase Chain Reaction MeSH
- Pseudomonas syringae physiology MeSH
- Gene Expression Regulation, Plant drug effects radiation effects MeSH
- Plant Proteins genetics metabolism MeSH
- Solanum lycopersicum drug effects genetics growth & development radiation effects MeSH
- Light * MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Amino Acids MeSH
- Anthocyanins MeSH
- Bacterial Toxins MeSH
- coronatine MeSH Browser
- Cyclopentanes MeSH
- Indenes MeSH
- jasmonic acid MeSH Browser
- Abscisic Acid MeSH
- Oxylipins MeSH
- Plant Proteins MeSH
The spontaneous mutant 7B-1 in tomato (Solanum lycopersicum=Lycopersicon esculentum) is a photoperiod-dependent male-sterile mutant previously reported as resistant to various abiotic stresses specifically under blue light. Since this finding improved the potential of 7B-1's use in breeding programmes, its susceptibility to stress induced by coronatine (COR), the phytotoxine produced by several Pseudomonas syringae strains, was assessed in this study. The 7B-1 mutant was found to be less sensitive than the corresponding wild type (WT) to COR treatment in a blue light-dependent manner. Treatment of WT and 7B-1 plants with COR induced a strong accumulation of salicylic acid (SA), jasmonic acid (JA), and abscisic acid (ABA) in hypocotyls. Interestingly, accumulation of ABA and SA in the 7B-1 mutant was distinctly greater than in WT, especially in blue light. Based on the cross-talk between SA- and JA-signalling pathways, expression analysis of NPR1 and COI1 genes, respectively involved in these pathways, was investigated in COR-stressed plants. The blue light-specific lower sensitivity of 7B-1 plants to COR was found to be associated with blue light-specific overexpression of the NPR1 gene. These data suggest that the SA-dependent NPR1-dependent pathway could be involved in the lower sensitivity of the 7B-1 mutant to COR. The role of anthocyanins and ABA accumulation during the response to COR is also discussed in the present study.
References provided by Crossref.org
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