title: Dissecting out the crosstalk between salinity and hormones in roots of Arabidopsis.
abstract: Phytohormones are chemical messengers that play a leading role in regulating the vital activity of plants, including transcription, posttranscriptional pre-mRNA splicing, translation, and posttranslational modifications by interacting with specific protein receptors. Plant hormones are synthesized in one tissue and act on specific target sites in other tissues at vanishingly low concentrations. High salinity is one of the main factors limiting Arabidopsis growth and productivity. In this study, phytohormones including abscisic acid, auxin, ethylene, and cytokinin responsive genes regulating salinity stress in Arabidopsis roots were monitored using microarray data. We identified phytohormone responsive genes on the basis of their expression pattern at genomic level at various time points. Using publicly available microarray data, we analyzed the effect of salt stress on the transcription of phytohormone responsive genes. Gene ontology (GO) analysis of phytohormone responsive genes showed their role in important biological processes such as signal transduction, hormone metabolism, biosynthetic process, and gene expression. Gene enrichment terms also reveal that transcription regulator activity is the main class of ABA responsive genes under salinity stress. We conclude that expression of ABA responsive genes involves induction of several transcription factors under salt stress treatment in Arabidopsis roots.
authors.affiliation: Stress Physiology and Molecular Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi, India.
authors.forename: Khushwant
authors.initials: K
authors.lastname: Singh
authors.forename: Sneh L
authors.initials: SL
authors.lastname: Singla-Pareek
authors.forename: Ashwani
authors.initials: A
authors.lastname: Pareek
mesh_terms: D017360:Arabidopsis / Q000235:genetics* / Q000378:metabolism*; D016000:Cluster Analysis; D020869:Gene Expression Profiling; D018506:Gene Expression Regulation, Plant; D010937:Plant Growth Regulators / Q000235:genetics / Q000378:metabolism*; D018517:Plant Roots / Q000235:genetics* / Q000378:metabolism*; D054712:Salinity; D013312:Stress, Physiological; D013997:Time Factors; D014157:Transcription Factors / Q000378:metabolism; D059467:Transcriptome
chemical_list: D010937:Plant Growth Regulators; D014157:Transcription Factors