title: Microarray analysis of transcriptional responses to abscisic acid and salt stress in Arabidopsis thaliana.
abstract: Abscisic acid (ABA) plays a crucial role in plant responses to abiotic stress. To investigate differences in plant responses to salt and ABA stimulus, differences in gene expression in Arabidopsis in response to salt and ABA were compared using an Agilent oligo microarray. A total of 144 and 139 genes were significantly up- and downregulated, respectively, under NaCl stress, while 406 and 381 genes were significantly up- and downregulated, respectively, under ABA stress conditions. In addition, 31 genes were upregulated by both NaCl and ABA stresses, and 23 genes were downregulated by these stressors, suggesting that these genes may play similar roles in plant responses to salt and ABA stress. Gene ontology (GO) analysis revealed four subgroups of genes, including genes in the GO categories "Molecular transducer activity", "Growth", "Biological adhesion" and "Pigmentation", which were expressed in response to ABA stress but not NaCl stress. In addition, genes that play specific roles during salt or ABA stress were identified. Our results may help elucidate differences in the response of plants to salt and ABA stress.
authors.affiliation: State Key Laboratory of Forest Genetics and Tree Breeding, Northeast Forestry University, 26 Hexing Road, Harbin 150040, China. ychngwang@yahoo.com.
authors.forename: Yujia
authors.initials: Y
authors.lastname: Liu
authors.forename: Xiaoyu
authors.initials: X
authors.lastname: Ji
authors.forename: Lei
authors.initials: L
authors.lastname: Zheng
authors.forename: Xianguang
authors.initials: X
authors.lastname: Nie
authors.forename: Yucheng
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000040:Abscisic Acid / Q000378:metabolism*; D017360:Arabidopsis / Q000235:genetics* / Q000502:physiology; D029681:Arabidopsis Proteins / Q000235:genetics*; D018506:Gene Expression Regulation, Plant; D012965:Sodium Chloride / Q000378:metabolism*; D013312:Stress, Physiological; D015533:Transcriptional Activation; D059467:Transcriptome
chemical_list: D029681:Arabidopsis Proteins; D012965:Sodium Chloride; D000040:Abscisic Acid