Rhizoctonia solani Secretes RsCAP3 to Target Nb14-3-3b, Interfering with Hormone-Mediated Resistance in Nicotiana benthamiana
文献类型： 外文期刊
作者： Wang, Jun 1 ; Zhang, Jia-Xin 1 ; Dai, Xiao-Feng 1 ; Guo, Qi-Tang 3 ; Chen, Jie-Yin 1 ; Li, Ying 4 ; Zhang, Dan-Dan 1 ;
作者机构： 1.Chinese Acad Agr Sci, State Key Lab Biol Plant Dis & Insect Pests, Inst Plant Protect, Beijing 100193, Peoples R China
2.Fujian Agr & Forestry Univ, Fuzhou 350002, Peoples R China
3.Sanming Tobacco Co, Datian Branch, Sanming 365000, Peoples R China
4.Chinese Acad Agr Sci, Western Agr Res Ctr, Changji 831100, Peoples R China
5.Chinese Acad Agr Sci, Tobacco Res Inst, Qingdao 266101, Peoples R China
关键词：
CAP protein;
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.2； 五年影响因子：6.4 ）
ISSN： 0021-8561
年卷期： 2025 年 73 卷 26 期
页码：
收录情况： SCI
摘要： The necrotrophic phytopathogen Rhizoctonia solani causes leaf spot and root rot in tobacco, which significantly reduce the yield and quality of the crop. Recently, much attention has been paid to R. solani effectors, but only a few of them have been characterized. Here, we identified a CAP domain-containing protein, RsCAP3, with a functional signal peptide, which triggers slight cell death on tobacco leaves. Meanwhile, RsCAP3 dramatically induces salicylic acid (SA) signaling but inhibits jasmonic acid (JA) signaling, increasing the plant's susceptibility to R. solani. Moreover, we demonstrated that RsCAP3 interacts with Nb14-3-3b, a negative regulator of tobacco resistance to R. solani. Correspondingly, we also found that transient expression of Nb14-3-3b activates SA signaling while suppressing JA signaling. Based on these results, we propose that RsCAP3 hijacks Nb14-3-3b to disrupt JA and SA pathways, thereby facilitating the infection of R. solani. Our findings highlight a novel virulence strategy in which R. solani interferes with the JA-/SA-mediated defense response.
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