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MYB transcription factors play important roles in plant responses to biotic and abiotic stress. In this study,  TaODORANT1 , a R2R3-MYB gene, was cloned from wheat ( Triticum aestivum  L.). TaODORANT1 was localized in the nucleus and functioned as a transcriptional activator.  TaODORANT1  was up-regulated in wheat under PEG6000, NaCl, ABA, and H 2 O 2  treatments.  TaODORANT1 -overexpressing transgenic tobacco plants exhibited higher relative water content and lower water loss rate under drought stress, as well as lower Na +  accumulation in leaves under salt stress. The transgenic plants showed higher CAT activity but lower ion leakage, H 2 O 2  and malondialdehyde contents under drought and salt stresses. Besides, the transgenic plants also exhibited higher SOD activity under drought stress. Our results also revealed that  TaODORANT1  overexpression up-regulated the expression of several ROS- and stress-related genes in response to both drought and salt stresses, thus enhancing transgenic tobacco plants tolerance. Our studies demonstrate that TaODORANT1 positively regulates plant tolerance to drought and salt stresses.

A Wheat R2R3-type MYB Transcription Factor TaODORANT1 Positively Regulates Drought and Salt Stress Responses in Transgenic Tobacco Plants