Identification and Characterization of the Populus AREB/ABF Subfamily

doi:10.1111/j.1744-7909.2012.01183.x

J Integr Plant Biol. ›› 2013, Vol. 55 ›› Issue (2): 177-186.DOI: 10.1111/j.1744-7909.2012.01183.x

Special Issue: Abiotic Stresses

• Plant-environmental Interactions • Previous Articles Next Articles

Identification and Characterization of the Populus AREB/ABF Subfamily

Lexiang Ji^†, Jia Wang^†, Meixia Ye, Ying Li, Bin Guo, Zhong Chen, Hao Li and Xinmin An^*

National Engineering Laboratory for Tree Breeding, NDRC; Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, MOE; The Tree and Ornamental Plant Breeding and Biotechnology Laboratory, SFA, College of Biological Sciences and Biotechnology, Beijing Forestry University, Beijing 100083, China

Received:2012-07-20 Accepted:2012-10-08 Published:2013-02-04
About author:^†These authors contributed equally to this work.
^*Corresponding author Tel/Fax: + 86-10-6233-6248; E-mail: anxinmin@bjfu.edu.cn

Abstract

Abstract:

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 Torr. & Gray. genome using five AREB/ABF amino acid sequences from Arabidopsis thaliana L. 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.

Ji L, Wang J, Ye M, Li Y, Guo B, Chen Z, Li H, An X (2013) Identification and characterization of the Populus AREB/ABF subfamily. J. Integr. Plant Biol. 55(2), 177–186.

Key words: Arabidopsis thaliana, Populus, AREB/ABF, Bioinformatics, qRT-PCR

Lexiang Ji, Jia Wang, Meixia Ye, Ying Li, Bin Guo, Zhong Chen, Hao Li and Xinmin An. Identification and Characterization of the Populus AREB/ABF Subfamily[J]. J Integr Plant Biol., 2013, 55(2): 177-186.

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Identification and Characterization of the Populus AREB/ABF Subfamily

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