Identification and Characterization of the Populus AREB/ABF Subfamily
Abscisic acid (ABA) is a major plant hormone that plays an important role in responses to abiotic stresses.The ABA-responsive element binding protein/ABRE-binding factor (AREB/ABF) gene subfamily contains crucial transcription factors in the ABA-mediated signaling pathway.In this study, a total of 14 putative AREB/ABF members were identified in the Populus trichocarpa genome using five AREB/ABF amino acid sequences from Arabidopsis thaliana as probes.The 14 putative Populus subfamily members showed high protein similarities, especially in the basic leucine zipper (bZIP) domain region.A neighbor-joining analysis combined with gene structure data revealed homology among the 14 genes.The expression patterns of the Populus AREB/ABF subfamily suggested that the most abundant transcripts of 11 genes occurred in leaf tissues, while two genes were most transcribed in root tissues.Significantly, eight Populus AREB/ABF gene members were upregulated after treatment with 100 μM exogenous ABA, while the other six members were downregulated.We identified the expression profiles of the subfamily members in Populus tissues and elucidated different response patterns of Populus AREB/ABF members to ABA stress.This study provided insight into the roles of Populus AREB/ABF homologues in plant response to abiotic stresses.
Arabidopsis thaliana Populus AREB/ABF Bioinformatics qRT-PCR
季乐翔 王佳 安新民
北京林业大学林木育种国家工程实验室林木花卉遗传育种教育部重点实验室国家林业局树木花卉育种与生物工程重点开放实验室 北京100083
国内会议
长沙
英文
233-242
2013-10-01（万方平台首次上网日期，不代表论文的发表时间）