The Nuclear Effector MiISE23 From Meloidogyne incognita Targets JAZ Proteins and Suppresses Jasmonate Signalling, Increasing Host Susceptibility
文献类型： 外文期刊
作者： Shi, Qianqian 1 ; Liu, Rui 2 ; Jiang, Lijun 2 ; Gao, Shasha 1 ; Ma, Juan 4 ; Tian, Xiaoxuan 1 ; Jiang, Chunyu 1 ; Liang, Chen 1 ; Zhao, Honghai 1 ; Song, Wenwen 1 ; Xie, Bingyan 2 ;
作者机构： 1.Qingdao Agr Univ, Coll Plant Hlth & Med, Shandong Engn Res Ctr Environm Friendly Agr Pest M, Qingdao, Shandong, Peoples R China
2.Chinese Acad Agr Sci, Inst Vegetables & Flowers, State Key Lab Vegetable Biobreeding, Beijing, Peoples R China
3.Chinese Acad Agr Sci, Tobacco Res Inst, Qingdao, Shandong, Peoples R China
4.Hebei Acad Agr & Forestry Sci, Protect Inst, Technol Joint Res Ctr IPM Hebei Prov, Key Lab IPM Crops Northern Reg North China,MARA Ch, Shijiazhuang, Hebei, Peoples R China
关键词： effector; JA signalling; JAZ proteins; Meloidogyne incognita; plant immunity; stabilisation
期刊名称：PLANT CELL AND ENVIRONMENT （ 影响因子：6.3； 五年影响因子：7.7 ）
ISSN： 0140-7791
年卷期： 2025 年 48 卷 6 期
页码：
收录情况： SCI
摘要： Meloidogyne incognita is an economically important plant-parasitic nematode that can infect thousands of different plant species. During its interaction with host plants, M. incognita synthesises numerous effectors in oesophageal glands, which are then secreted into plant tissues. Here, we characterised the effector MiISE23 and found that it could suppress plant immune responses. In situ hybridisation showed that MiISE23 was expressed in the subventral glands. Transgenic Arabidopsis plants expressing MiISE23 were more susceptible to M. incognita, whereas host-derived RNAi of MiISE23 was found to decrease M. incognita infection in Arabidopsis. In vitro and in vivo experiments showed that MiISE23 repressed jasmonate (JA) signalling by directly interacting with and suppressing jasmonoyl-isoleucine (JA-Ile)-induced degradation of jasmonate ZIM-domain proteins by COI1. The expression of MiISE23 in Arabidopsis repressed the expression of JA-responsive genes and reduced the levels of endogenous JA-Ile. AtJAZ6 transgenic lines of Arabidopsis showed increased susceptibility to M. incognita infection. Collectively, our results show that MiISE23 stabilises JAZ proteins and interferes with JA signalling, revealing a novel mechanism utilised by root-knot nematodes to hijack phytohormone signalling and promote parasitism.
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