The Infection Route of Tomato Zonate Spot Virus in the Digestive System of Its Insect Vector Frankliniella occidentalis
文献类型： 外文期刊
作者： Chen, Yong 1 ; Liu, Yuyan 1 ; Wang, Liang 1 ; Li, Heng 1 ; Linghu, Tingting 1 ; Chen, Yixin 1 ; Tian, Houjun 1 ; Lin, Shuo 1 ; Zheng, Xue 3 ; Wei, Hui 1 ;
作者机构： 1.Fujian Acad Agr Sci, Inst Plant Protect, Fujian Key Lab Monitoring & Integrated Management, Fuzhou Sci Observing and Expt Stn Crop Pests,Minis, Fuzhou, Peoples R China
2.Fujian Agr & Forestry Univ, State Key Lab Ecol Pest Control Fujian & Taiwan Cr, Fuzhou, Peoples R China
3.Yunnan Acad Agr Sci, Inst Biotechnol & Germplasm Resources, Kunming, Peoples R China
关键词： tomato zonate spot virus; thrips; digestive system; transmission mode; immunofluorescence; transmission electron microscopy
期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：6.064； 五年影响因子：6.843 ）
ISSN：
年卷期： 2022 年 13 卷
页码：
收录情况： SCI
摘要： Tomato zonate spot virus (TZSV) is a phytopathogen of the genus Orthotospovirus (Bunyaviridae) that is widespread in many areas of Southwest China. TZSV is mainly transmitted by Frankliniella occidentalis, but its exact infection route remains unclear. To explore this issue, we detected the nucleocapsid protein of TZSV in the digestive systems of first-instar F. occidentalis nymphs fed with TZSV-infected pepper leaves. TZSV infection in the F. occidentalis digestive system begins within 4 h post-first access to diseased plants: The foregut is likely the primary site of infection, and primary salivary glands (PSGs) are the destination. There are three potential routes for TZSV transmission from the alimentary canal to the PSGs: (1) virus dissemination from the midgut to hemocoel followed by movement to the PSGs; (2) accumulation in midgut epithelial cells and arrival at PSGs via tubular salivary glands and efferent ducts; and (3) arrival at epitheliomuscular cells of the forepart of the midgut and movement along the ligament to the PSGs. We tested the transmission efficiency of F. occidentalis in second-instar nymphs and female and male adults. TZSV was transmitted in a persistent-propagative mode by both nymphs and adults, with adults appearing to show slightly higher transmission efficiency than nymphs. We confirmed the presence of all three routes for TZSV transmission in F. occidentalis and determined that like other Orthotospoviruses, TZSV is transmitted in a persistent-propagative manner. These results should facilitate the control of TZSV-related diseases and further our understanding of the transmission biology of Orthotospoviruses in general.
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