To successfully colonise plants, pathogens must circumvent the plant immune system. Intracellular immune receptors of the nucleotide-binding leucine-rich repeat (NLR) class of proteins are major components of the plant immune system. NLRs function as disease resistance genes by recognising effectors secreted by diverse pathogens, triggering a localised form of programmed cell death known as the hypersensitive response. To evade detection, effectors have evolved to suppress NLR-mediated immunity by targeting NLRs either directly or indirectly. Here, we compile the latest discoveries related to NLR-suppressing effectors and categorise these effectors based on their mode of action. We discuss the diverse strategies pathogens use to perturb NLR-mediated immunity, and how we can use our understanding of effector activity to help guide new approaches for disease resistance breeding.
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http://dx.doi.org/10.1016/j.pbi.2023.102396 | DOI Listing |
Plants (Basel)
January 2025
School of Bioengineering, Dalian University of Technology, No. 2 Linggong Road, Dalian 116024, China.
Plant immunity is largely governed by nucleotide-binding leucine-rich repeat receptor (NLR). Here, we examine the molecular activation and inhibition mechanisms of the wheat CC-type NLR , a previously proposed candidate for the resistance gene. Though recent studies have identified as the true gene, Yr10 remains an important NLR in understanding NLR-mediated immunity in wheat.
View Article and Find Full Text PDFJ Integr Plant Biol
January 2025
Department of Plant Pathology, Nanjing Agricultural University, Nanjing, 210095, China.
Plant viruses cause substantial agricultural devastation and economic losses worldwide. Plant nucleotide-binding domain leucine-rich repeat receptors (NLRs) play a pivotal role in detecting viral infection and activating robust immune responses. Recent advances, including the elucidation of the interaction mechanisms between NLRs and pathogen effectors, the discovery of helper NLRs, and the resolution of the ZAR1 resistosome structure, have significantly deepened our understanding of NLR-mediated immune responses, marking a new era in NLR research.
View Article and Find Full Text PDFNat Commun
November 2024
Plant Immunity Research Center, Seoul National University, Seoul, 08826, Republic of Korea.
NLR receptor is suggested as a component of plant nonhost resistance (NHR). However, the evolutionary process of how plants develop receptors for recognizing broad-spectrum pathogens is still elusive. Here, we observe that multiple RxLR effector families including 12 reported avirulence effectors of Phytophthora infestans are broadly conserved across the Phytophthora species.
View Article and Find Full Text PDFNat Commun
September 2024
The State Key Laboratory of Wheat and Maize Crop Science, College of Life Sciences, Henan Agricultural University, Zhengzhou, 450046, P. R. China.
Plant Cell Rep
September 2024
Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai, 200234, China.
Two plant U-box E3 ligases, PUB5 and PUB44, antagonistically regulate the NLR receptor SUMM2-mediated autoimmunity in Arabidopsis, indicating a new regulatory mechanism for fine-tuning plant immunity.
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