Plant pathogens convergently evolved to counteract redundant nodes of an NLR immune receptor network

Derevnina, Lida, Contreras, Mauricio P., Adachi, Hiroaki, Upson, Jessica, Vergara Cruces, Angel, Xie, Rongrong, Skłenar, Jan, Menke, Frank L. H., Mugford, Sam T., MacLean, Dan, Ma, Wenbo, Hogenhout, Saskia, Goverse, Aska, Maqbool, Abbas, Wu, Chih-Hang and Kamoun, Sophien (2021) Plant pathogens convergently evolved to counteract redundant nodes of an NLR immune receptor network. PLoS Biology, 19 (8). ISSN 1545-7885

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Abstract

In plants, nucleotide-binding domain and leucine-rich repeat (NLR)-containing proteins can form receptor networks to confer hypersensitive cell death and innate immunity. One class of NLRs, known as NLR required for cell death (NRCs), are central nodes in a complex network that protects against multiple pathogens and comprises up to half of the NLRome of solanaceous plants. Given the prevalence of this NLR network, we hypothesised that pathogens convergently evolved to secrete effectors that target NRC activities. To test this, we screened a library of 165 bacterial, oomycete, nematode, and aphid effectors for their capacity to suppress the cell death response triggered by the NRC-dependent disease resistance proteins Prf and Rpi-blb2. Among 5 of the identified suppressors, 1 cyst nematode protein and 1 oomycete protein suppress the activity of autoimmune mutants of NRC2 and NRC3, but not NRC4, indicating that they specifically counteract a subset of NRC proteins independently of their sensor NLR partners. Whereas the cyst nematode effector SPRYSEC15 binds the nucleotide-binding domain of NRC2 and NRC3, the oomycete effector AVRcap1b suppresses the response of these NRCs via the membrane trafficking-associated protein NbTOL9a (Target of Myb 1-like protein 9a). We conclude that plant pathogens have evolved to counteract central nodes of the NRC immune receptor network through different mechanisms. Coevolution with pathogen effectors may have driven NRC diversification into functionally redundant nodes in a massively expanded NLR network.

Item Type: Article
Uncontrolled Keywords: neuroscience(all),biochemistry, genetics and molecular biology(all),immunology and microbiology(all),agricultural and biological sciences(all) ,/dk/atira/pure/subjectarea/asjc/2800
Faculty \ School:
Faculty of Science > School of Biological Sciences
Related URLs:
Depositing User: LivePure Connector
Date Deposited: 25 Aug 2021 09:55
Last Modified: 17 Sep 2021 01:16
URI: https://ueaeprints.uea.ac.uk/id/eprint/81206
DOI: 10.1371/journal.pbio.3001136

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