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

Scientific Reports
Xuening WeiZengYan Zhang

Abstract

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 c...Continue Reading

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Citations

Oct 28, 2019·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Ke WangXingguo Ye

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Datasets Mentioned

BETA
GSE69245
AAB41101
AED97610
ABU93236
AAK08983
KF034796

Methods Mentioned

BETA
transgenic
PCRs
PCR
transfection
Scanning Microscopy

Software Mentioned

MEGA
Clustal X
BLAST
Quantasoft
Pfam

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