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A Small Cysteine-Rich Protein from the Asian Soybean Rust Fungus, Phakopsora pachyrhizi, Suppresses Plant Immunity
PLoS Pathogens
  • Mingsheng Qi, Iowa State University
  • Tobias I. Link, Universität Hohenheim, Stuttgart
  • Manuel Müller, Universität Hohenheim, Stuttgart
  • Daniela Hirschburger, Universität Hohenheim, Stuttgart
  • Ramesh N. Pudake, Amity University Uttar Pradesh, Noida, India
  • Kerry F. Pedley, United States Department of Agriculture
  • Edward Braun, Iowa State University
  • Ralf T. Voegele, Universität Hohenheim, Stuttgart
  • Thomas J. Baum, Iowa State University
  • Steven A. Whitham, Iowa State University
Document Type
Article
Publication Version
Published Version
Publication Date
9-27-2016
DOI
10.1371/journal.ppat.1005827
Abstract
The Asian soybean rust fungus, Phakopsora pachyrhizi, is an obligate biotrophic pathogen causing severe soybean disease epidemics. Molecular mechanisms by which P. pachyrhizi and other rust fungi interact with their host plants are poorly understood. The genomes of all rust fungi encode many small, secreted cysteine-rich proteins (SSCRP). While these proteins are thought to function within the host, their roles are completely unknown. Here, we present the characterization of P. pachyrhizi effector candidate 23 (PpEC23), a SSCRP that we show to suppress plant immunity. Furthermore, we show that PpEC23 interacts with soybean transcription factor GmSPL12l and that soybean plants in which GmSPL12l is silenced have constitutively active immunity, thereby identifying GmSPL12l as a negative regulator of soybean defenses. Collectively, our data present evidence for a virulence function of a rust SSCRP and suggest that PpEC23 is able to suppress soybean immune responses and physically interact with soybean transcription factor GmSPL12l, a negative immune regulator.
Comments

This article is published as Qi, Mingsheng, Tobias I. Link, Manuel Müller, Daniela Hirschburger, Ramesh N. Pudake, Kerry F. Pedley, Edward Braun, Ralf T. Voegele, Thomas J. Baum, and Steven A. Whitham. "A small cysteine-rich protein from the Asian soybean rust fungus, Phakopsora pachyrhizi, suppresses plant immunity." PLoS pathogens 12, no. 9 (2016): e1005827, doi: 10.1371/journal.ppat.1005827.

Rights
This is an open access article, free of all copyright, and may be freely reproduced, distributed, transmitted, modified, built upon, or otherwise used by anyone for any lawful purpose. The work is made available under the Creative Commons CC0 public domain dedication.
Language
en
File Format
application/pdf
Citation Information
Mingsheng Qi, Tobias I. Link, Manuel Müller, Daniela Hirschburger, et al.. "A Small Cysteine-Rich Protein from the Asian Soybean Rust Fungus, Phakopsora pachyrhizi, Suppresses Plant Immunity" PLoS Pathogens Vol. 12 Iss. 9 (2016) p. e1005827
Available at: http://works.bepress.com/thomas-baum/9/