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MYB transcription factors (TFs) have been implicated in various biology processes in model plants. However, functions of the great majority of MYB TFs in wheat ( Triticum aestivum  L.) have not been characterized. The soil-borne fungal pathogens  Bipolaris sorokiniana  and  Rhizoctonia cerealis  are the causal agents of important destructive diseases of wheat. Here, the  TaPIMP2  gene, encoding a pathogen-induced MYB protein in wheat, was isolated through comparative transcriptomic analysis, and its defensive role was studied. TaPIMP2 was proved to localize in nuclei.  TaPIMP2  responded in a different extent and speed upon infections of  B .  sorokiniana  or  R .  cerealis .  TaPIMP2  displayed different expression patterns after exogenous application of phytohormones, including abscisic acid, ethylene, and salicylic acid. Silencing of  TaPIMP2  repressed resistance of wheat cultivar Yangmai 6 to  B .  sorokiniana , but did not alter resistance of wheat line CI12633 to  R .  cerealis .  TaPIMP2  overexpression significantly improved resistance to  B .  sorokiniana  rather than  R .  cerealis  in transgenic wheat. Moreover,  TaPIMP2  positively modulated the expression of pathogenesis-related genes, including  PR1a ,  PR2 ,  PR5 , and  PR10 . Collectively,  TaPIMP2  positively contributes to wheat resistance to  B .  sorokiniana  possibly through regulating the expression of defense-related genes, and  TaPIMP2  plays distinct roles in defense responses to different fungal infection.

TaPIMP2, a pathogen-induced MYB protein in wheat, contributes to host resistance to common root rot caused by Bipolaris sorokiniana