Virulence effectors encoded in the rice yellow dwarf phytoplasma genome participate in pathogenesis

文献类型： 外文期刊

第一作者： Zhang, Shuai

作者： Zhang, Shuai;Gan, Peng;Xie, Huiting;Li, Chuan;Tang, Tianxin;Hu, Qiong;Zhu, Zhihong;Hu, Qun;Hu, Jie;Zhao, Shanshan;Wu, Jianguo;Xie, Huiting;Zhang, Zhongkai;Zhang, Jisen;Zhu, Yongsheng;Guan, Hongxin

作者机构：

期刊名称：PLANT PHYSIOLOGY （ 影响因子：6.9； 五年影响因子：7.7 ）

ISSN： 0032-0889

年卷期： 2024 年 197 卷 1 期

页码：

收录情况： SCI

摘要： Bacteria-like phytoplasmas alternate between plant and insect hosts, secreting proteins that disrupt host development. In this study, we sequenced the complete genome of "Candidatus Phytoplasma oryzae" strain HN2022, associated with rice yellow dwarf (RYD) disease, using PacBio HiFi technology. The strain was classified within the 16Sr XI-B subgroup. Through SignalP v5.0 for prediction and subsequent expression analysis of secreted proteins in Nicotiana benthamiana and rice (Oryza sativa L.), we identified the key virulence effector proteins RY348 and RY378. RY348, a homolog of Secreted Aster Yellows Phytoplasma Effector 54 (SAP54), targets and degrades the MADS-box transcription factors MADS1 and MADS15, causing pollen sterility. Meanwhile, RY378 impacts the strigolactone and auxin signaling pathways, substantially increasing tillering. These findings offer insights into the interactions between plants and phytoplasmas. The RYD phytoplasma genome encodes virulence effectors that cause pollen sterility by disrupting transcription factor genes and enhance tillering by modifying phytohormone pathways.

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