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Title: Roles of sodium hydrosulfide and sodium nitroprusside as priming molecules during drought acclimation in citrus plants
Authors: Ziogas, Vasileios 
Tanou, Georgia 
Belghazi, Maya 
Filippou, Panagiota S. 
Fotopoulos, Vasileios 
Grigorios, Diamantidis 
Molassiotis, Athanassios 
Major Field of Science: Agricultural Sciences
Field Category: Agriculture Forestry and Fisheries
Keywords: Citrus;Drought stress;Plant proteomics;Priming;Sodium hydrosulfide;Sodium nitroprusside
Issue Date: 24-Sep-2015
Source: Plant Molecular Biology, 2015, vol. 89, no. 4-5, pp. 433-450.
Volume: 89
Issue: 4-5
Start page: 433
End page: 450
DOI: 10.1007/s11103-015-0379-x
Journal: Plant Molecular Biology 
Abstract: Emerging evidence suggests that the gaseous molecules hydrogen sulfide (H2S) and nitric oxide (NO) enhances plant acclimation to stress; however, the underlying mechanism remains unclear. In this work, we explored if pretreatment of citrus roots with NaHS (a H2S donor) or sodium nitroprusside (SNP, a NO donor) for 2 days (d) could elicit long-lasting priming effects to subsequent exposure to PEG-associated drought stress for 21 d following a 5 d acclimation period. Detailed physiological study documented that both pretreatments primed plants against drought stress. Analysis of the level of nitrite, NOx, S-nitrosoglutahione reductase, Tyr-nitration and S-nitrosylation along with the expression of genes involved in NO-generation suggested that the nitrosative status of leaves and roots was altered by NaHS and SNP. Using a proteomic approach we characterized S-nitrosylated proteins in citrus leaves exposed to chemical treatments, including well known and novel S-nitrosylated targets. Mass spectrometry analysis also enabled the identification of 42 differentially expressed proteins in PEG alone-treated plants. Several PEG-responsive proteins were down-regulated, especially photosynthetic proteins. Finally, the identification of specific proteins that were regulated by NaHS and SNP under PEG conditions provides novel insight into long-term drought priming in plants and in a fruit crop such as citrus in particular.
ISSN: 0167-4412
DOI: 10.1007/s11103-015-0379-x
Rights: © Springer
Attribution-NonCommercial-NoDerivs 3.0 United States
Type: Article
Affiliation : Aristotle University of Thessaloniki 
Proteomics Analysis Center 
Cyprus University of Technology 
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