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Pathogenicity analysis and seed transmission of watermelon virus A in bottle gourd

文献类型： 外文期刊

作者： Su, Qi 1 ; Tang, Yafei 1 ; Lan, Guobing 1 ; Yu, Lin 1 ; Ding, Shanwen 1 ; He, Zifu 1 ; She, Xiaoman 1 ; Li, Zhenggang 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Plant Protect Res Inst, Guangdong Prov Key Lab High Technol Plant Protect, Guangzhou 510640, Peoples R China

关键词： Watermelon virus A; Pathogenicity; Seed transmission; Cucumber green mottle mosaic virus; Bottle gourd

期刊名称：VIROLOGY （ 影响因子：2.8； 五年影响因子：2.7 ）

ISSN： 0042-6822

年卷期： 2024 年 596 卷

页码：

收录情况： SCI

摘要： Seed transmission is among the primary strategies utilized by plant viruses for long-distance dissemination, leading to the widespread occurrence of viral diseases globally. Watermelon virus A (WVA) is a novel wamavirus first found in watermelon. However, the pathogenicity and transmission mode of WVA are still unclear. Our previous work found that the incidence of WVA in bottle gourd is very high. Based on that, the pathogenicity and seed transmission mode of WVA in bottle gourd were studied. Compared with healthy plant, bottle gourd infected by WVA showed no visible disease symptom. Moreover, in the seeds of 20 bottle gourd cultivars, the occurrence of WVA varies from 0 to 90%, and one cultivar even reaches 100%. We also found that the transmission rate from seeds to the resulting seedlings was 100%. Furthermore, WVA was present in both the seed coat and embryo, and seed disinfection cannot eliminate WVA. Besides the seed and leaf, WVA can also be detected in stem, flower, and fruit, but not in the root. To our surprise, the level of transmission from WVAinfected plants to seeds was more than 85%. In addition, the viral accumulations of both WVA and CGMMV were increased in plants with co-infection of WVA and CGMMV. Taken together, these findings reveal that WVA is a seed-transmitted virus which causes no disease symptom in bottle gourd, and there may be synergism between WVA and CGMMV.

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