Phytophthora suppressor of RNA silencing 2 is a conserved RxLR effector that promotes infection in soybean and Arabidopsis thaliana

Xiong, Qin, Ye, Wenwu, Choi, Duseok, Wong, James, Qiao, Yongli, Tao, Kai, Wang, Yuanchao and Ma, Wenbo (2014) Phytophthora suppressor of RNA silencing 2 is a conserved RxLR effector that promotes infection in soybean and Arabidopsis thaliana. Molecular Plant-Microbe Interactions, 27 (12). pp. 1379-1389. ISSN 0894-0282

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Abstract

The genus Phytophthora consists of notorious and emerging pathogens of economically important crops. Each Phytophthora genome encodes several hundreds of cytoplasmic effectors, which are believed to manipulate plant immune response inside the host cells. However, the majority of Phytophthora effectors remain functionally uncharacterized. We recently discovered two effectors from the soybean stem and root rot pathogen Phytophthora sojae with the activity to suppress RNA silencing in plants. These effectors are designated Phytophthora suppressor of RNA silencing (PSRs). Here, we report that the P. sojae PSR2 (PsPSR2) belongs to a conserved and widespread effector family in Phytophthora. A PsPSR2-like effector produced by P. infestans (PiPSR2) can also suppress RNA silencing in plants and promote Phytophthora infection, suggesting that the PSR2 family effectors have conserved functions in plant hosts. Using Agrobacterium rhizogenes-mediated hairy roots induction, we demonstrated that the expression of PsPSR2 rendered hypersusceptibility of soybean to P. sojae. Enhanced susceptibility was also observed in PsPSR2-expressing Arabidopsis thaliana plants during Phytophthora but not bacterial infection. These experiments provide strong evidence that PSR2 is a conserved Phytophthora effector family that performs important virulence functions specifically during Phytophthora infection of various plant hosts.

Item Type: Article
Additional Information: Publisher Copyright: © 2014 The American Phytopathological Society
Uncontrolled Keywords: physiology,agronomy and crop science ,/dk/atira/pure/subjectarea/asjc/1300/1314
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Depositing User: LivePure Connector
Date Deposited: 12 Sep 2022 12:31
Last Modified: 30 Sep 2022 02:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/88160
DOI: 10.1094/MPMI-06-14-0190-R

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