Cloning and Expression Analysis of TaWRKYⅢA37 and TaWRKYcD2 Genes in Wheat
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    Abstract:

    In order to explore the function of wheat (Triticum aestivum L.) WRKY gene, we cloned two WRKY genes named TaWRKYⅢA37 and TaWRKYcD2 from wheat variety ‘Kenong 199’ by homologous cloning, and their bioinformatics and expression under different stresses were analyzed. Bioinformatic analysis showed that TaWRKYⅢA37 and TaWRKYcD2 genes contain two introns and three exons, encoding 206 and 138 amino acids, respectively. The encoded proteins are all hydrophilic unstable non secretory nucleoproteins. Phylogenetic analysis showed that TaWRKYⅢA37 protein was the closest to its two homologous copies, while TaWRKYcD2 protein was the closest to that of Aegilops tauschii. The results of qRTPCR showed that TaWRKYⅢA37 and TaWRKYcD2 genes were expressed in the roots, stems and leaves of wheat. The former had the highest expression level in the roots, while the latter had the highest expression level in the leaves, all of which were low expression in the stems. The expression of TaWRKYⅢA37 gene in seedling stage was upregulated by PEG, H2O2 and ABA stress, and down regulated within 4~8 hours after NaCl treatment, which was lower than that of the control; While the expression was up regulated by PEG, NaCl, H2O2 and ABA in the filling stage. At seedling stage, TaWRKYcD2 gene was down regulated by NaCl, H2O2 and ABA stress, and up regulated by PEG treatment for 2 hours, which was higher than that of control; While the expression was down regulated by PEG and NaCl stress at the filling stage, and up regulated by H2O2 and ABA stress. The results of this study lay a theoretical foundation for further exploring the antistress function of TaWRKYⅢA37 and TaWRKYcD2 genes.

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ZHANG Yuling, DU Shuangshuang, TIAN Shujun, WEN Shanshan. Cloning and Expression Analysis of TaWRKYⅢA37 and TaWRKYcD2 Genes in Wheat[J]. Acta Botanica Boreali-Occidentalia Sinica,2020,40(6):927-936

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  • Online: July 30,2020
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