Chloroplast clustering around the nucleus induced by OMP24 overexpression unexpectedly promoted PSTVd infection in Nicotiana benthamiana

文献类型： 外文期刊

第一作者： Han, Kelei

作者： Han, Kelei;Jia, Zhaoxing;Zhang, Yuhong;Zhou, Huijie;Bu, Shan;Chen, Jianping;Yan, Fei;Wu, Jian;Han, Kelei;Jia, Zhaoxing;Zhang, Yuhong;Zhou, Huijie;Bu, Shan;Chen, Jianping;Wu, Jian;Yan, Dankan;Qi, Rende;Yan, Fei;Wu, Jian

作者机构：

关键词： chloroplast outer membrane protein 24; H2O2; perinuclear chloroplast clustering; potato spindle tuber viroid

期刊名称：MOLECULAR PLANT PATHOLOGY （ 影响因子：4.9； 五年影响因子：5.9 ）

ISSN： 1464-6722

年卷期： 2023 年 24 卷 12 期

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收录情况： SCI

摘要： Chloroplast clustering around the nucleus is a well-known mechanism that occurs in response to various biotic and abiotic stresses and is believed to be a mechanism of defence against pathogens in plants. This phenomenon is accompanied by increased production of reactive oxygen species (ROS), which can help to destroy invading pathogens. However, the function of chloroplast clustering during viroid infection is unclear. Here, we report that, although the infection by potato spindle tuber viroid (PSTVd) failed to induce chloroplast clustering, chloroplast clustering caused by the overexpression of the Nicotiana benthamiana chloroplast outer membrane protein 24 (NbOMP24) promoted the infection by PSTVd, a viroid pathogen, in N. benthamiana. Interestingly, H2O2 treatment, which caused increased ROS accumulation, showed no significant effects on PSTVd infection. Moreover, NbOMP24 protein showed no direct interaction with PSTVd. We propose that perinuclear chloroplast clustering induced by NbOMP24 provides a favourable environment for PSTVd infection. These findings highlight the complexity of chloroplast clustering-mediated plant-pathogen interactions and the need for further research to fully understand these mechanisms.

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