The specific W-boxes of GAPC5 promoter bound by TaWRKY are involved in drought stress response in wheat.

Plant Science : an International Journal of Experimental Plant Biology
Fangfang LiShushen Yang

Abstract

Drought is one of the most common abiotic stresses, and can limit wheat yield, crops and productivity. GAPCs play vital roles under drought stress conditions in multiple species. The aim of this experiment was to determine the regulatory mechanism of TaGAPC5 under drought stress. In this study, the genes and promoters of TaGAPC5 in diverse drought-tolerant cultivars were cloned. The amino acid sequences were conserved, while the promoter fragments were not identical. Under abiotic stress, the expression level of TaGAPC5 was substantially different among the diverse drought-tolerant cultivars and the promoter activities were significantly improved. The yeast one-hybrid system and Electrophoretic mobility shift assay (EMSA) demonstrated that TaWRKYs bound to specific W-boxes: TaWRKY28, TaWRKY33, TaWRKY40 and TaWRKY47 bind to G/ATGACG/C/A, C/G/ATGACG, C/ATGACC and C/ATGACC/G, respectively. By analyzing different 5' deletion mutants of these promoters, it was determined that these W-boxes in CW-TaGAPC5 promoter (-1262, -1202, -904, -880 and -207) and ZY-TaGAPC5 promoter (-697 and -220) bound by these four TaWRKYs and were functional under drought stress. The deletion or addition of specific W-boxes in the promoter fragments signifi...Continue Reading

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Citations

Oct 16, 2020·International Journal of Molecular Sciences·Lin ZhangShushen Yang

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