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Spontaneous mutation 7B-1 in tomato impairs blue light-induced stomatal opening
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SYSNO ASEP 0399105 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Spontaneous mutation 7B-1 in tomato impairs blue light-induced stomatal opening Author(s) Hlavinka, J. (CZ)
Nauš, J. (CZ)
Fellner, Martin (UEB-Q) RID, ORCIDSource Title Plant Science. - : Elsevier - ISSN 0168-9452
Roč. 209, č. 2013 (2013), s. 75-80Number of pages 6 s. Language eng - English Country IE - Ireland Keywords ABA ; Anion-channel blocker ; Blue light Subject RIV ED - Physiology R&D Projects GD522/08/H003 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z50380511 - UEB-Q (2005-2011) UT WOS 000321413100008 DOI https://doi.org/10.1016/j.plantsci.2013.04.010 Annotation It was reported earlier that 7B-1 mutant in tomato (Solanum lycopersicum L.), an ABA overproducer, is defective in blue light (BL) signaling leading to BL-specific resistance to abiotic and biotic stresses. In this work, we examine responses of stomata to blue, red and white lights, fusicoccin, anion channel blockers (anthracene-9-carboxylic acid; 9-AC and niflumic acid; NIF) and ABA. Our results showed that the aperture of 7B-1 stomata does not increase in BL, suggesting that 7B-1 mutation impairs an element of BL signaling pathway involved in stomata]. opening. Similar stomatal responses of 7B-1 and wild type (WT) to fusicoccin or 9-AC points out that activity of H+-ATPase and 9-AC-sensitive anion channels per se is not likely affected by the mutation. Since 9-AC restored stomatal opening of 7B-1 in BL, it seems that 9-AC and BL could block similar type of anion channels. The stomata of both genotypes did not respond to NIF neither in darkness nor in any light conditions tested. In light, 9-AC but not NIF restored stomatal opening inhibited by ABA in WT and 7B-1. We suggest that in comparison to WT, the activity of S-type anion channels in 7B-1 is more promoted by increased ABA content, and less reduced by BL, because of the mutant resistance to BL. Workplace Institute of Experimental Botany Contact David Klier, knihovna@ueb.cas.cz, Tel.: 220 390 469 Year of Publishing 2014
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