Oomycete pathogens encode RNA silencing suppressors

Yongli Qiao, Lin Liu, Qin Xiong, Cristina Flores, James Wong, Jinxia Shi, Xianbing Wang, Xigang Liu, Qijun Xiang, Shushu Jiang, Fuchun Zhang, Yuanchao Wang, Howard S. Judelson, Xuemei Chen, Wenbo Ma

Research output: Contribution to journalArticlepeer-review

173 Citations (Scopus)

Abstract

Effectors are essential virulence proteins produced by a broad range of parasites, including viruses, bacteria, fungi, oomycetes, protozoa, insects and nematodes. Upon entry into host cells, pathogen effectors manipulate specific physiological processes or signaling pathways to subvert host immunity. Most effectors, especially those of eukaryotic pathogens, remain functionally uncharacterized. Here, we show that two effectors from the oomycete plant pathogen Phytophthora sojae suppress RNA silencing in plants by inhibiting the biogenesis of small RNAs. Ectopic expression of these Phytophthora suppressors of RNA silencing enhances plant susceptibility to both a virus and Phytophthora, showing that some eukaryotic pathogens have evolved virulence proteins that target host RNA silencing processes to promote infection. These findings identify RNA silencing suppression as a common strategy used by pathogens across kingdoms to cause disease and are consistent with RNA silencing having key roles in host defense.

Original languageEnglish
Pages (from-to)330-333
Number of pages4
JournalNature Genetics
Volume45
Issue number3
DOIs
Publication statusPublished - Mar 2013

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