Skip Navigation


JXB Advance Access originally published online on February 12, 2009
Journal of Experimental Botany 2009 60(4):1219-1230; doi:10.1093/jxb/ern366
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Supplementary Data
Right arrow All Versions of this Article:
60/4/1219    most recent
ern366v1
Right arrow E-letters: Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when E-letters are posted
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Right arrow Disclaimer
Google Scholar
Right arrow Articles by Bergougnoux, V.
Right arrow Articles by Fellner, M.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Bergougnoux, V.
Right arrow Articles by Fellner, M.
Agricola
Right arrow Articles by Bergougnoux, V.
Right arrow Articles by Fellner, M.
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author [2009]. Published by Oxford University Press [on behalf of the Society for Experimental Biology]. All rights reserved. For Permissions, please e-mail: journals.permissions@oxfordjournals.org

RESEARCH PAPER

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

Véronique Bergougnoux1, Vladimíra Hlavácková2, Renáta Plotzová1, Ondrej Novák3 and Martin Fellner1,3,*

1Palacky University in Olomouc, Faculty of Science, Department of Cell Biology and Genetics, Laboratory of Molecular Physiology, Slechtitelu 11, 783 71 Olomouc, Czech Republic
2Palacky University in Olomouc, Faculty of Science, Department of Experimental Physics, Laboratory of Biophysics, Tr. Svobody 26, 771 46 Olomouc, Czech Republic
3Palacky University in Olomouc, Faculty of Science, and Institute of Experimental Botany, Academy of Science of the Czech Republic, v.v.i., Laboratory of Growth Regulators, Slechtitelu 11, 783 71 Olomouc, Czech Republic

* To whom correspondence should be addressed. E-mail: martin.fellner{at}upol.cz

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.

Key words: Blue light-specific response, COI1, coronatine, growth, NPR1, SA-signalling pathway, 7B-1 mutant, tomato (Solanum lycopersicum L.), Lycopersicum esculentum L

Received 28 October 2008; Accepted 22 December 2008


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.