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Evolutionary trade‐offs at the Arabidopsis WRR4A resistance locus underpin alternate Albugo candida race recognition specificities
Author(s) -
Castel Baptiste,
Fairhead Sebastian,
Furzer Oliver J.,
Redkar Amey,
Wang Shanshan,
Cevik Volkan,
Holub Eric B.,
Jones Jonathan D. G.
Publication year - 2021
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1111/tpj.15396
Subject(s) - locus (genetics) , race (biology) , arabidopsis , biology , resistance (ecology) , botany , gene , genetics , ecology , mutant
SUMMARY The oomycete Albugo candida causes white rust of Brassicaceae , including vegetable and oilseed crops, and wild relatives such as Arabidopsis thaliana . Novel White Rust Resistance ( WRR ) genes from Arabidopsis enable new insights into plant/parasite co‐evolution. WRR4A from Arabidopsis accession Columbia (Col‐0) provides resistance to many but not all white rust races, and encodes a nucleotide‐binding, leucine‐rich repeat immune receptor. Col‐0 WRR4A resistance is broken by AcEx1, an isolate of A. candida . We identified an allele of WRR4A in Arabidopsis accession Øystese‐0 (Oy‐0) and other accessions that confers full resistance to AcEx1. WRR4A Oy‐0 carries a C‐terminal extension required for recognition of AcEx1, but reduces recognition of several effectors recognized by the WRR4A Col‐0 allele. WRR4A Oy‐0 confers full resistance to AcEx1 when expressed in the oilseed crop Camelina sativa .