Multiple recognition of RXLR effectors is associated with nonhost resistance of pepper against Phytophthora infestans

Lee, Hyun Ah, Kim, Shin Young, Oh, Sang Keun, Yeom, Seon In, Kim, Saet Byul, Kim, Myung Shin, Kamoun, Sophien and Choi, Doil (2014) Multiple recognition of RXLR effectors is associated with nonhost resistance of pepper against Phytophthora infestans. New Phytologist, 203 (3). pp. 926-938. ISSN 0028-646X

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Abstract

Summary: Nonhost resistance (NHR) is a plant immune response to resist most pathogens. The molecular basis of NHR is poorly understood, but recognition of pathogen effectors by immune receptors, a response known as effector-triggered immunity, has been proposed as a component of NHR. We performed transient expression of 54 Phytophthora infestansRXLR effectors in pepper (Capsicum annuum) accessions. We used optimized heterologous expression methods and analyzed the inheritance of effector-induced cell death in an F2 population derived from a cross between two pepper accessions. Pepper showed a localized cell death response upon inoculation with P. infestans, suggesting that recognition of effectors may contribute to NHR in this system. Pepper accessions recognized as many as 36 effectors. Among the effectors, PexRD8 and Avrblb2 induced cell death in a broad range of pepper accessions. Segregation of effector-induced cell death in an F2 population derived from a cross between two pepper accessions fit 15 : 1, 9 : 7 or 3 : 1 ratios, depending on the effector. Our genetic data suggest that a single or two independent/complementary dominant genes are involved in the recognition of RXLR effectors. Multiple loci recognizing a series of effectors may underpin NHR of pepper to P. infestans and confer resistance durability.

Item Type: Article
Additional Information: © 2014 The Authors. New Phytologist © 2014 New Phytologist Trust This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Uncontrolled Keywords: multiple interactions,nonhost resistance,pepper,phytophthora infestans,rxlr effectors
Faculty \ School:
Faculty of Science > School of Biological Sciences
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Depositing User: Pure Connector
Date Deposited: 06 Jun 2016 16:00
Last Modified: 22 Apr 2020 01:28
URI: https://ueaeprints.uea.ac.uk/id/eprint/59234
DOI: 10.1111/nph.12861

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