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Cysteine-rich receptor kinases (CRKs) belong to the receptor-like kinase family. Little is known about CRK genes in wheat. We isolated a wheat CRK gene  TaCRK1  from  Rhizoctonia cerealis -resistant wheat CI12633 based on a differentially expressed sequence identified by RNA-Sequencing (RNA-Seq) analysis.  TaCRK1  was more highly expressed in CI12633 than in susceptible Wenmai 6. Transcription of  TaCRK1  in wheat was induced in CI12633 after  R. cerealis  infection and exogenous abscisic acid (ABA) treatment. The deduced TaCRK1 protein contained a signal peptide, two DUF26 domains, a transmembrane domain, and a serine/threonine protein kinase domain. Transient expression of a green fluorescence protein fused with TaCRK1 in wheat and onion indicated that TaCRK1 may localize to plasma membranes. Characterization of  TaCRK1  silencing induced by virus-mediated method in CI12633 showed that the downregulation of  TaCRK1  transcript did not obviously impair resistance to  R. cerealis . This study paves the way to further CRK research in wheat.

Isolation and characterization of a novel wheat cysteine-rich receptor-like kinase gene induced by Rhizoctonia cerealis