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A Tolerant Behavior in Salt-Sensitive Tomato Plants can be Mimicked by Chemical Stimuli.
MedLine Citation:
PMID:  19516968     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Lycopersicon esculentum plants exhibit increased salt stress tolerance following treatment with adipic acid monoethylester and 1,3-diaminepropane (DAAME), known as an inducer of resistance against biotic stress in tomato and pepper. For an efficient water and nutrient uptake, plants should adapt their water potential to compensate a decrease in water soil potential produced by salt stress. DAAME-treated plants showed a faster and stronger water potential reduction and an enhanced proline accumulation. Salinity-induced oxidative stress was also ameliorated by DAAME treatments. Oxidative membrane damage and ethylene emission were both reduced in DAAME-treated plants. This effect is probably a consequence of an increase of both non-enzymatic antioxidant activity as well as peroxidase activity. DAAME-mediated tolerance resulted in an unaltered photosynthetic rate and a stimulation of the decrease in transpiration under stress conditions without a cost in growth due to salt stress. The reduction in transpiration rate was concomitant with a reduction in phytotoxic Na(+) and Cl(-) accumulation under saline stress. Interestingly, the ABA deficient tomato mutant sitiens was insensitive to DAAME-induced tolerance following NaCl stress exposure. Additionally, DAAME treatments increased the ABA content of leaves, therefore, an intact ABA signalling pathway seems to be important to express DAAME-induced salt tolerance. Here, we show a possibility of enhance tomato stress tolerance by chemical induction of the major plant defences against salt stress. DAAME-induced tolerance against salt stress could be complementary to or share elements with induced resistance against biotic stress. This might be the reason for the observed wide spectrum of effectiveness of this compound.
Authors:
Víctor Flors; Mercedes Paradís; Javier García-Andrade; Miguel Cerezo; Carmen González-Bosch; Pilar García-Agustín
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Plant signaling & behavior     Volume:  2     ISSN:  1559-2316     ISO Abbreviation:  Plant Signal Behav     Publication Date:  2007 Jan 
Date Detail:
Created Date:  2009-06-11     Completed Date:  2012-10-02     Revised Date:  2013-05-23    
Medline Journal Info:
Nlm Unique ID:  101291431     Medline TA:  Plant Signal Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  50-7     Citation Subset:  -    
Affiliation:
Area de Fisiología Vegetal; Departamento de Ciencias Agrarias y del Medio Natural; Universitat Jaume I; Castellón, Spain.
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