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

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.

• Publication year

  2017

• Venue

  Scientific Reports

• Publication date

  2017-05-11

• Fields of study

  Biology, Medicine, Environmental Science

• Identifiers
  DOI 10.1038/s41598-017-01918-7PMID 28496196PMCID 5431884
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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