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BioMed Research International
Volume 2014, Article ID 787680, 14 pages
Research Article

Identification and Characterization of the Grape WRKY Family

Forestry Department, Agricultural University of Henan Province, Zhengzhou, Henan 450002, China

Received 15 November 2013; Revised 16 January 2014; Accepted 21 January 2014; Published 27 April 2014

Academic Editor: Anton M. Jetten

Copyright © 2014 Ying Zhang and Jian can Feng. 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.


WRKY transcription factors have functions in plant growth and development and in response to biotic and abiotic stresses. Many studies have focused on functional identification of WRKY transcription factors, but little is known about the molecular phylogeny or global expression patterns of the complete WRKY family. In this study, we identified 80 WRKY proteins encoded in the grape genome. Based on the structural features of these proteins, the grape WRKY genes were classified into three groups (groups 1–3). Analysis of WRKY genes expression profiles indicated that 28 WRKY genes were differentially expressed in response to biotic stress caused by grape whiterot and/or salicylic acid (SA). In that 16 WRKY genes upregulated both by whiterot pathogenic bacteria and SA. The results indicated that 16 WRKY proteins participated in SA-dependent defense signal pathway. This study provides a basis for cloning genes with specific functions from grape.