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Distinct tomato yellow leaf curl Chuxiong virus isolated from whiteflies and plants in China and its symptom determinant and suppressor of post-transcriptional gene silencing

文献类型：外文期刊

第一作者： Xie, Yan

作者： Xie, Yan;Liu, Xianan;Luo, Chaohu;Hu, Qianqian;Che, Xuan;Zhao, Min;Wu, Liqi;Zhao, Liling;Ding, Ming

作者机构：

关键词： Begomovirus; Tomato yellow leaf curl Chuxiong virus; Whitefly; Molecular identity; Symptom determinant; Post-transcriptional gene silencing

期刊名称：VIROLOGY （影响因子：3.7；五年影响因子：3.2 ）

ISSN： 0042-6822

年卷期： 2024 年 594 卷

页码：

收录情况： SCI

摘要： A begomovirus isolated from whiteflies (Bemisia tabaci) and tomato, sweet potato in China was found to be representative of a distinct begomovirus species, for which the name tomato yellow leaf curl Chuxiong virus (TYLCCxV) is proposed. The results of genomic identification and sequence comparison showed that TYLCCxV shares the highest complete nucleotide sequence identity (88.3%) with croton yellow vein mosaic virus (CroYVMV), and may have originated from the recombination between synedrella leaf curl virus (SyLCV) and squash leaf curl Yunnan virus (SLCuYV). Agrobacterium-mediated inoculation showed that TYLCCxV is highly infectious for a range of plant species, producing upward leaf curling, leaf crumpling, chlorosis, distortion, and stunt symptoms in Solanum lycopersicum plants. The results of Southern blot indicated that TYLCCxV is capable of efficiently replicating two heterologous betasatellites. The inoculation of PVX::C4 on Nicotiana benthamiana induced upward leaf curling and stem elongation symptoms, suggesting that TYLCCxV C4 functions as a symptom determinant. TYLCCxV V2 is an important virulence factor that induces downward leaf curling symptoms, elicits systemic necrosis, and suppresses local and systemic GFP silencing in co-agroinfiltrated N. benthamiana and transgenic 16c plants. Considering the multifunctional virulence proteins V2 and C4, the possibility of TYLCCxV causing devastating epidemics on tomato in China is discussed.

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