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Alleviation of Drought Stress by Hydrogen Sulfide Is Partially Related to the Abscisic Acid Signaling Pathway in Wheat.
- Source :
- PLoS ONE; 9/20/2016, Vol. 11 Issue 9, p1-16, 16p
- Publication Year :
- 2016
-
Abstract
- Little information is available describing the effects of exogenous H<subscript>2</subscript>S on the ABA pathway in the acquisition of drought tolerance in wheat. In this study, we investigated the physiological parameters, the transcription levels of several genes involved in the abscisic acid (ABA) metabolism pathway, and the ABA and H<subscript>2</subscript>S contents in wheat leaves and roots under drought stress in response to exogenous NaHS treatment. The results showed that pretreatment with NaHS significantly increased plant height and the leaf relative water content of seedlings under drought stress. Compared with drought stress treatment alone, H<subscript>2</subscript>S application increased antioxidant enzyme activities and reduced MDA and H<subscript>2</subscript>O<subscript>2</subscript> contents in both leaves and roots. NaHS pretreatment increased the expression levels of ABA biosynthesis and ABA reactivation genes in leaves; whereas the expression levels of ABA biosynthesis and ABA catabolism genes were up-regulated in roots. These results indicated that ABA participates in drought tolerance induced by exogenous H<subscript>2</subscript>S, and that the responses in leaves and roots are different. The transcription levels of genes encoding ABA receptors were up-regulated in response to NaHS pretreatment under drought conditions in both leaves and roots. Correspondingly, the H<subscript>2</subscript>S contents in leaves and roots were increased by NaHS pretreatment, while the ABA contents of leaves and roots decreased. This implied that there is complex crosstalk between these two signal molecules, and that the alleviation of drought stress by H<subscript>2</subscript>S, at least in part, involves the ABA signaling pathway. [ABSTRACT FROM AUTHOR]
- Subjects :
- WHEAT
HYDROGEN sulfide
ABSCISIC acid
DROUGHT-tolerant plants
ANTIOXIDANTS
PHYSIOLOGY
Subjects
Details
- Language :
- English
- ISSN :
- 19326203
- Volume :
- 11
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- PLoS ONE
- Publication Type :
- Academic Journal
- Accession number :
- 118220742
- Full Text :
- https://doi.org/10.1371/journal.pone.0163082