Synthesis and Characterization of a Full-Length Infectious cDNA Clone of Tomato Mottle Mosaic Virus
文献类型： 外文期刊
作者： Tu, Liqin 1 ; Wu, Shuhua 2 ; Gao, Danna 1 ; Liu, Yong 3 ; Zhu, Yuelin 1 ; Ji, Yinghua 2 ;
作者机构： 1.Nanjing Agr Univ, Coll Hort, Nanjing 210095, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Plant Protect, Key Lab Food Qual & Safety Jiangsu Prov, State Key Lab Breeding Base, Nanjing 210014, Peoples R China
3.Hunan Acad Agr Sci, Inst Plant Protect, Changsha 410125, Peoples R China
关键词： tomato mottle mosaic virus; full-length genome sequence; infectious cDNA clone; Agrobacterium-mediated inoculation; infectivity
期刊名称：VIRUSES-BASEL （ 影响因子：5.048； 五年影响因子：5.127 ）
ISSN：
年卷期： 2021 年 13 卷 6 期
页码：
收录情况： SCI
摘要： Tomato mottle mosaic virus (ToMMV) is a noteworthy virus which belongs to the Virgaviridae family and causes serious economic losses in tomato. Here, we isolated and cloned the full-length genome of a ToMMV Chinese isolate (ToMMV-LN) from a naturally infected tomato (Solanum lycopersicum L.). Sequence analysis showed that ToMMV-LN contains 6399 nucleotides (nts) and is most closely related to a ToMMV Mexican isolate with a sequence identity of 99.48%. Next, an infectious cDNA clone of ToMMV was constructed by a homologous recombination approach. Both the model host N. benthamiana and the natural hosts tomato and pepper developed severe symptoms upon agroinfiltration with pToMMV, which had a strong infectivity. Electron micrographs indicated that a large number of rigid rod-shaped ToMMV virions were observed from the agroinfiltrated N. benthamiana leaves. Finally, our results also confirmed that tomato plants inoculated with pToMMV led to a high infection rate of 100% in 4-5 weeks post-infiltration (wpi), while pepper plants inoculated with pToMMV led to an infection rate of 40-47% in 4-5 wpi. This is the first report of the development of a full-length infectious cDNA clone of ToMMV. We believe that this infectious clone will enable further studies of ToMMV genes function, pathogenicity and virus-host interaction.
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