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International Journal of Genomics
Volume 2017, Article ID 3981031, 14 pages
https://doi.org/10.1155/2017/3981031
Research Article

Genome-Wide Identification of bZIP Family Genes Involved in Drought and Heat Stresses in Strawberry (Fragaria vesca)

1College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China
2Department of Plant Sciences, University of Tennessee, Knoxville, TN 37996-4560, USA
3Food Quality Laboratory, Beltsville Agricultural Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, MD 20705, USA
4Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN 37996-4560, USA

Correspondence should be addressed to Zong-Ming Cheng; nc.ude.uajn@cmz

Received 11 October 2016; Revised 24 January 2017; Accepted 12 February 2017; Published 11 April 2017

Academic Editor: Ferenc Olasz

Copyright © 2017 Xiao-Long Wang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Basic leucine zipper (bZIP) genes are known to play a crucial role in response to various processes in plant as well as abiotic or biotic stress challenges. We have performed an identification and characterization of 50 bZIP genes across the woodland strawberry (Fragaria vesca) genome, which were divided into 10 clades according to the phylogenetic relationship of the strawberry bZIP proteins with those in Arabidopsis and rice. Five categories of intron patterns were observed within basic and hinge regions of the bZIP domains. Some additional conserved motifs have been found with the group specificity. Further, we predicted DNA-binding specificity of the basic and hinge regions as well as dimerization properties of leucine zipper regions, which was consistent with our phylogenetic clade and classified into 20 subfamilies. Across the different developmental stages of 15 organs and two types of fruits, the clade A bZIP members showed different tissue-specific expression patterns and the duplicated genes were differentially regulated, indicating a functional diversification coupled with the expansion of this gene family in strawberry. Under normal growth conditions, mrna11837 and mrna30280 of clade A showed very weak expression levels in organs and fruits, respectively; but higher expression was observed with different set of genes following drought and heat treatment, which may be caused by the separate response pathway between drought and heat treatments.