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

第一作者： Wang, Jun

作者： Wang, Jun;Zhang, Jia-Xin;Dai, Xiao-Feng;Chen, Jie-Yin;Zhang, Dan-Dan;Zhang, Jia-Xin;Guo, Qi-Tang;Chen, Jie-Yin;Li, Ying;Zhang, Dan-Dan;Li, Ying

作者机构：

关键词： CAP protein; Rhizoctonia solani; salicylic acid; jasmonic acid; tobacco resistance

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

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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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