A lineage-specific Exo70 is required for receptor kinase–mediated immunity in barley

• DOI: 10.1126/sciadv.abn7258
• Publication Date: 2022-07-06T17:52:46Z
• Authors: Samuel Holden; Molly Bergum; Phon Green; Jan Bettgenhaeuser; Inmaculada Hernán...; Anupriya Thind; Shaun Clare; James M. Russell; Amelia Hubbard; Jodi Taylor; Matthew Smoker; Matthew Gardiner; Laura Civolani; Francesco Cosenza; Serena Rosignoli; Roxana Strugala; István Molnár; Hana Šimková; Jaroslav Doležel; Ulrich Schaffrath; Matthew Barrett; Silvio Salvi; Matthew J. Moscou
• Keywords: Lineage (genetic)

In the evolution of land plants, plant immune system has experienced expansion in receptor and signaling pathways. Lineage-specific expansions have been observed diverse gene families that are potentially involved immunity but lack causal association. Here, we show Rps8-mediated resistance barley to pathogen Puccinia striiformis f. sp. tritici (wheat stripe rust) is conferred by a genetic module: Pur1 Exo70FX12, which together necessary sufficient. encodes leucine-rich repeat kinase ortholog rice Xa21, Exo70FX12 belongs Poales-specific Exo70FX clade. The clade emerged after divergence Bromeliaceae Poaceae comprises from 2 75 members sequenced grasses. These results demonstrate requirement lineage-specific Pur1-mediated suggest may evolved specialized role signaling.