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Title of Journal: Planta

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Abbravation: Planta

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Springer-Verlag

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10.1016/j.autneu.2005.04.005

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1432-2048

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Expression and functional analysis of two genes en

Authors: Huie Li Yan Xu Yu Xiao Ziguo Zhu Xiaoqing Xie Heqing Zhao Yuejin Wang
Publish Date: 2010/09/02
Volume: 232, Issue: 6, Pages: 1325-1337
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Abstract

In this study two WRKY genes were isolated from Erysiphe necatorresistant Chinese wild Vitis pseudoreticulata W T Wang ‘Baihe351’ and designated as VpWRKY1 GenBank accession no GQ884198 and VpWRKY2 GenBank accession no GU565706 Nuclear localization of the two proteins was demonstrated in onion epidermal cells while transactivation function was confirmed in the leaves of ‘Baihe351’ Expression of VpWRKY1 and VpWRKY2 was induced rapidly by salicylic acid treatment in ‘Baihe351’ Expression of VpWRKY1 and VpWRKY2 was also induced rapidly by E necator infection in 11 grapevine genotypes the maximum induction of VpWRKY1 was greater in E necatorresistant grapevine genotypes than in susceptible ones post E necator inoculation Furthermore ectopic expression of VpWRKY1 or VpWRKY2 in Arabidopsis enhanced resistance to powdery mildew Erysiphe cichoracearum and enhanced salt tolerance of transgenic plants VpWRKY2 also enhanced cold tolerance of transgenic plants In addition the two proteins were shown to regulate the expression of some defense marker genes in Arabidopsis and grapevine The data suggest that VpWRKY1 and VpWRKY2 may underlie the resistance in transgenic grapevine to E necator and tolerance to salt and cold stressesWe thank Dr Zhongchi Liu Department of Cell Biology and Molecular Genetics University of Maryland USA for critical review and comments of the manuscript and Courtney Hollender Department of Cell Biology and Molecular Genetics University of Maryland USA for the help of revising this manuscript language This work was supported by the National Natural Science Foundation of China for “Expression and Functional Analysis of Transcription Factor Genes Isolated from Powdery Mildewresistant Chinese Wild Grape” Grant No 30771493

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