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Huang L, Yuan Y, Lewis C, Kud J, Kuhl JC, Caplan A, Dandurand LM, Zasada I, Xiao F. NILR1 perceives a nematode ascaroside triggering immune signaling and resistance. Curr Biol 2023; 33:3992-3997.e3. [PMID: 37643618 DOI: 10.1016/j.cub.2023.08.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 07/04/2023] [Accepted: 08/03/2023] [Indexed: 08/31/2023]
Abstract
Plants use pattern recognition receptors (PRRs) to perceive conserved molecular patterns derived from pathogens and pests, thereby activating a sequential set of rapid cellular immune responses, including activation of mitogen-activated protein kinases (MAPKs) and Ca2+-dependent protein kinases (CDPKs), transcriptional reprogramming (particularly the induction of defense-related genes), ion fluxes, and production of reactive oxygen species.1 Plant PRRs belong to the multi-membered protein families of receptor-like kinases (RLKs) or receptor-like proteins (RLPs). RLKs consist of a ligand-binding ectodomain, a single-pass transmembrane domain, and an intracellular kinase domain, while RLPs possess the same functional domains, except for the intracellular kinase domain.2 The most abundant nematode ascaroside, Ascr18, is a nematode-associated molecular pattern (NAMP) that induces immune signaling and enhances resistance to pathogens and pests in various plant species.3 In this study, we found that the Arabidopsis NEMATODE-INDUCED LRR-RLK1 (NILR1) protein4 physically interacts with the Ascr18 elicitor, as indicated by a specific direct interaction between NILR1 and Ascr18, and NILR1 is genetically required for Ascr18-triggered immune signaling and resistance to both bacterium and nematode, as manifested by the abolishment of these immune responses in the nilr1 mutant. These results suggest that NILR1 is the immune receptor of the nematode NAMP Ascr18, mediating Ascr18-triggered immune signaling and resistance to pathogens and pests.
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Affiliation(s)
- Li Huang
- Department of Plant Sciences, University of Idaho, Moscow, ID 83844, USA
| | - Yulin Yuan
- Department of Plant Sciences, University of Idaho, Moscow, ID 83844, USA
| | - Chloe Lewis
- Department of Plant Sciences, University of Idaho, Moscow, ID 83844, USA
| | - Joanna Kud
- Department of Entomology & Plant Pathology, University of Arkansas, Fayetteville, AR 72701, USA
| | - Joseph C Kuhl
- Department of Plant Sciences, University of Idaho, Moscow, ID 83844, USA
| | - Allan Caplan
- Department of Plant Sciences, University of Idaho, Moscow, ID 83844, USA
| | - Louise-Marie Dandurand
- Department of Entomology, Plant Pathology and Nematology, University of Idaho, Moscow, ID 83844, USA
| | - Inga Zasada
- USDA-ARS, Horticultural Crops Disease and Pest Management Research Unit, 3420 NW Orchard Avenue, Corvallis, OR 97330, USA
| | - Fangming Xiao
- Department of Plant Sciences, University of Idaho, Moscow, ID 83844, USA.
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Zheng B, Bai Q, Li C, Wang L, Wei Q, Ali K, Li W, Huang S, Xu H, Li G, Ren H, Wu G. Pan-brassinosteroid signaling revealed by functional analysis of NILR1 in land plants. New Phytol 2022; 235:1455-1469. [PMID: 35570834 DOI: 10.1111/nph.18228] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 05/06/2022] [Indexed: 06/15/2023]
Abstract
Brassinosteroid (BR) signaling has been identified from the ligand BRs sensed by the receptor Brassinosteroid Insensitive 1 (BRI1) to the final activation of Brassinozole Resistant 1/bri1 EMS-Suppressor 1 through a series of transduction events. Extensive studies have been conducted to characterize the role of BR signaling in various biological processes. Our previous study has shown that Excess Microsporocytes 1 (EMS1) and BRI1 control different aspects of plant growth and development via conserved intracellular signaling. Here, we reveal that another receptor, NILR1, can complement the bri1 mutant in the absence of BRs, indicating a pathway that resembles BR signaling activated by NILR1. Genetic analysis confirms the intracellular domains of NILR1, BRI1 and EMS1 have a common signal output. Furthermore, we demonstrate that NILR1 and BRI1 share the coreceptor BRI1 Associated Kinase 1 and substrate BSKs. Notably, the NILR1-mediated downstream pathway is conserved across land plants. In summary, we provide evidence for the signaling cascade of NILR1, suggesting pan-brassinosteroid signaling initiated by a group of distant receptor-ligand pairs in land plants.
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Affiliation(s)
- Bowen Zheng
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Qunwei Bai
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Chenxi Li
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Lihaitian Wang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Qiang Wei
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Khawar Ali
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Wenjuan Li
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Shengdi Huang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Hongxing Xu
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Guishuang Li
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Hongyan Ren
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
| | - Guang Wu
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710119, China
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