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Poaceae-specific beta-1,3;1,4-D-glucans link jasmonate signalling to OsLecRK1-mediated defence response during rice-brown planthopper interactions

文献类型： 外文期刊

作者： Dai, Yang-Shuo 1 ; Liu, Di 1 ; Guo, Wuxiu 1 ; Liu, Zhi-Xuan 2 ; Zhang, Xue 1 ; Shi, Li-Li 1 ; Zhou, De-Mian 1 ; Wang, Ling-Na 1 ; Kang, Kui 1 ; Wang, Feng-Zhu 1 ; Zhao, Shan-Shan 1 ; Tan, Yi-Fang 1 ; Hu, Tian 1 ; Chen, Wu 2 ; Li, Peng 2 ; Zhou, Qing-Ming 2 ; Yuan, Long-Yu 3 ; Zhang, Zhenfei 3 ; Chen, Yue-Qin 1 ; Zhang, Wen-Qing 1 ; Li, Juan 2 ; Yu, Lu-Jun 1 ; Xiao, Shi 1 ;

作者机构： 1.Sun Yat Sen Univ, Sch Life Sci, State Key Lab Biocontrol, Guangdong Prov Key Lab Plant Resources, Guangzhou, Peoples R China

2.Hunan Agr Univ, Coll Agron, Changsha, Peoples R China

3.Guangdong Acad Agr Sci, Plant Protect Res Inst, Guangzhou, Peoples R China

关键词： jasmonates; mixed-linkage beta-1,3;1,4-D-glucan; OsLecRK1; OsCslF6; Oryza sativa; plant-pest interaction

期刊名称：PLANT BIOTECHNOLOGY JOURNAL （ 影响因子：13.8； 五年影响因子：13.2 ）

ISSN： 1467-7644

年卷期： 2023 年 21 卷 6 期

页码：

收录情况： SCI

摘要： Brown planthopper (BPH, Nilaparvata lugens), a highly destructive insect pest, poses a serious threat to rice (Oryza sativa) production worldwide. Jasmonates are key phytohormones that regulate plant defences against BPH; however, the molecular link between jasmonates and BPH responses in rice remains largely unknown. Here, we discovered a Poaceae-specific metabolite, mixed-linkage beta-1,3;1,4-D-glucan (MLG), which contributes to jasmonate-mediated BPH resistance. MLG levels in rice significantly increased upon BPH attack. Overexpressing OsCslF6, which encodes a glucan synthase that catalyses MLG biosynthesis, significantly enhanced BPH resistance and cell wall thickness in vascular bundles, whereas knockout of OsCslF6 reduced BPH resistance and vascular wall thickness. OsMYC2, a master transcription factor of jasmonate signalling, directly controlled the upregulation of OsCslF6 in response to BPH feeding. The AT-rich domain of the OsCslF6 promoter varies in rice varieties from different locations and natural variants in this domain were associated with BPH resistance. MLG-derived oligosaccharides bound to the plasma membrane-anchored LECTIN RECEPTOR KINASE1 OsLecRK1 and modulated its activity. Thus, our findings suggest that the OsMYC2-OsCslF6 module regulates pest resistance by modulating MLG production to enhance vascular wall thickness and OsLecRK1-mediated defence signalling during rice-BPH interactions.

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