Sánchez-Martín J, Keller B. NLR immune receptors and diverse types of non-NLR proteins control
race-specific resistance in Triticeae.
Curr Opin Plant Biol 2021;
62:102053. [PMID:
34052730 DOI:
10.1016/j.pbi.2021.102053]
[Citation(s) in RCA: 35] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 04/01/2021] [Accepted: 04/12/2021] [Indexed: 06/12/2023]
Abstract
Recent progress in large-scale sequencing, genomics, and rapid gene isolation techniques has accelerated the identification of race-specific resistance (R) genes and their corresponding avirulence (Avr) genes in wheat, barley, rye, and their wild relatives. Here, we describe the growing repertoire of identified R and Avr genes with special emphasis on novel R gene architectures, revealing that there is a large diversity of proteins encoded by race-specific resistance genes that extends beyond the canonical nucleotide-binding domain leucine-rich repeat proteins. Immune receptors with unique domain architectures controlling race-specific resistance possibly reveal novel aspects on the biology of host-pathogen interactions. We conclude that the polyploid cereal genomes have a large evolutionary potential to generate diverse types of resistance genes.
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