Dissecting salt stress pathways

Journal of Experimental Botany
Shisong MaHans J. Bohnert

Abstract

Upon salt-stress treatment, Arabidopsis mobilizes a complex set of pathways that includes alterations in the regulation of gene expression and metabolic adjustments that attempt to establish a new energetic and developmental equilibrium. The responses share common elements with reactions to many other stresses, such as challenges by osmotic fluctuations, pathogens, mechanical interference, or cold stress. Also, hormones, such as ABA, ethylene, and jasmonic acid, play important roles in salt-stress signalling and adaptation. Publicly available and our own transcript profiling data are used here to dissect gene regulation under salt stress in A. thaliana Col-0. Applying the clustering method "fuzzy k-means clustering" on 1500 strongly regulated genes, the salt-stress response could be categorized into distinct segments. Fewer than 25% of the regulated genes are salt stress-specific, while the majority also responded to other stresses and/or hormone treatments. Significantly, roots and shoots showed differences in hormone responsiveness, and early and late responses correlated with different signalling events. A network begins to emerge, revealing the basis of cross-talk between high salinity and other stresses.

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Citations

Oct 24, 2009·Plant Cell Reports·Sylvain LegayDanièle Evers
Nov 7, 2008·Molecular Genetics and Genomics : MGG·Véronique GruberMartin Crespi
Sep 18, 2009·Molecular Genetics and Genomics : MGG·Yuanqing JiangMichael K Deyholos
May 30, 2007·Plant Molecular Biology·Youning WangXia Li
Aug 26, 2010·Molecular Biotechnology·Chen-Hsiang Yeang
Dec 21, 2011·Omics : a Journal of Integrative Biology·Khushwant SinghAshwani Pareek
Jan 10, 2012·Journal of Experimental Botany·Ahmed IsmailPeter Nick
Jan 31, 2009·Plant & Cell Physiology·Tantravahi SrinivasanPulugurtha Bharadwaja Kirti
Feb 10, 2012·Molecular Plant-microbe Interactions : MPMI·Manon MoreauMathilde Fagard
May 15, 2007·Plant Physiology·Richard Martin KrisDavid W Galbraith
Feb 13, 2009·Plant Physiology·Felix LippoldMichael K Udvardi
Apr 24, 2014·Journal of Experimental Botany·Ahmed IsmailPeter Nick
Jul 9, 2014·Annual Review of Phytopathology·Richard M BostockTatiana V Roubtsova

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