期刊
PLANT CELL
卷 24, 期 8, 页码 3420-3434出版社
OXFORD UNIV PRESS INC
DOI: 10.1105/tpc.112.099861
关键词
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资金
- Gatsby Charitable Foundation
- Leverhulme Early Career Fellowship [FP7-PEOPLE-2007-2-1-IEF]
- Deutsche Forschungsgemeinschaft [SCHO1347/1-1]
- Rural and Environmental Science and Analytical Services department of the Scottish Government
- Biotechnology and Biological Sciences Research Council
- BBSRC [BB/G015244/1, BB/E007120/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [BB/G015244/1, BB/E007120/1] Funding Source: researchfish
Plant pathogens secrete effector proteins to modulate plant immunity and promote host colonization. Plant nucleotide binding leucine-rich repeat (NB-LRR) immunoreceptors recognize specific pathogen effectors directly or indirectly. Little is known about how NB-LRR proteins recognize effectors of filamentous plant pathogens, such as Phytophthora infestans. AVR2 belongs to a family of 13 sequence-divergent P. infestans RXLR effectors that are differentially recognized by members of the R2 NB-LRR family in Solanum demissum. We report that the putative plant phosphatase BSU-LIKE PROTEIN1 (BSL1) is required for R2-mediated perception of AVR2 and resistance to P. infestans. AVR2 associates with BSL1 and mediates the interaction of BSL1 with R2 in planta, possibly through the formation of a ternary complex. Strains of P. infestans that are virulent on R2 potatoes express an unrecognized form, Avr2-like (referred to as A2l). A2L can still interact with BSL1 but does not promote the association of BSL1 with R2. Our findings show that recognition of the P. infestans AVR2 effector by the NB-LRR protein R2 requires the putative phosphatase BSL1. This reveals that, similar to effectors of phytopathogenic bacteria, recognition of filamentous pathogen effectors can be mediated via a host protein that interacts with both the effector and the NB-LRR immunoreceptor.
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