Wheat Genes and Negatively Regulate Post-Penetration Resistance against .

() is the airborne fungal pathogen that causes powdery mildew disease on hexaploid bread wheat. Calmodulin-binding transcription activators (CAMTAs) regulate plant responses to environments, but their potential functions in the regulation of wheat- interaction remain unknown. In this study, the wheat CAMTA transcription factors TaCAMTA2 and TaCAMTA3 were identified as suppressors of wheat post-penetration resistance against powdery mildew. Transient overexpression of and enhanced the post-penetration susceptibility of wheat to , while knockdown of and expression using transient- or virus-induced gene silencing compromised wheat post-penetration susceptibility to In addition, and were characterized as positive regulators of wheat post-penetration resistance against powdery mildew. Overexpressing and confers wheat post-penetration resistance against , while silencing and enhances wheat post-penetration susceptibility to Importantly, we showed that expressions of and were potentiated by silencing of and Collectively, these results implicated that the genes and contribute to the wheat- compatibility might via negative regulation of and expression.