overexpression of tawrky146 increases drought tolerance through inducing stomatal closure in arabidopsis thaliana

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ID: 248631
2017
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Ranked #495 of 808 articles by views in phytochemistry letters

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Résumé
As a superfamily of transcription factors, the tryptophan-arginine-lysine-tyrosine (WRKY) transcription factors have been found to be essential for abiotic and biotic stress responses in plants. Currently, only 76 WRKY transcription factors in wheat could be identified in the NCBI database, among which only a few have been functionally analyzed. Herein, a total of 188 WRKY transcription factors were identified from the wheat genome database, which included 123 full-length coding sequences, and all of them were used for detailed evolution studies. By bioinformatics analysis, a WRKY transcription factor, named TaWRKY146, was found to be the homologous gene of AtWRKY46, overexpression of which leads to hypersensitivity to drought and salt stress in Arabidopsis. Consequently, the full length of TaWRKY146 was cloned, and the expression levels of TaWRKY146 were found significantly up-regulated in the leaves and roots of wheat seedlings, which were subjected to osmotic stress. Overexpression of TaWRKY146 in Arabidopsis was shown to enhance drought tolerance by the induction of stomatal closure that reduced the transpiration rate. All these results provide a firm foundation for further identification of WRKY transcription factors with important functions in wheat.
Clé de Référence
ma2017frontiersoverexpression Utilisez cette clé pour citer automatiquement dans le manuscrit lors de l'utilisation de SciMatic Manuscript Manager ou Thesis Manager
Auteurs ;Jianhui Ma;Xiaolong Gao;Qing Liu;Yun Shao;Daijing Zhang;Lina Jiang;Chunxi Li
Revue phytochemistry letters
Année 2017
DOI
10.3389/fpls.2017.02036
URL
http://journal.frontiersin.org/article/10.3389/fpls.2017.02036/full
Mots-clés
drought tolerance triticum aestivum l

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