Bacterial Symbiont Mediates Aphid Antiviral Systems to Inhibit the Propagation of a New Pathogenic Densovirus in Chinese Wheat Aphid, Sitobion miscanthi
文献类型： 外文期刊
作者： Li, Tong 1 ; Chen, Jing 2 ; Yang, Gongqiang 1 ; Wu, Yuqing 1 ; Zhou, Juan 3 ; Xu, Pengjun 4 ; Ren, Feirong 5 ; Li, Minghui 1 ; Wu, Xujin 3 ; Qiao, Gexia 2 ;
作者机构： 1.Inst Plant Protect, Henan Acad Agr Sci, Henan Key Lab Crop Pest Control, Key Lab Integrated Pest Management Crops Southern, Zhengzhou 450002, Peoples R China
2.Chinese Acad Sci, Inst Zool, Key Lab Zool Systemat & Evolut, Beijing 100101, Peoples R China
3.Henan Acad Agr Sci, Inst Qual & Safety Agroprod, Henan Key Lab Grain Qual & Safety Testing, Zhengzhou 450002, Peoples R China
4.Chinese Acad Agr Sci, Tobacco Res Inst, Qingdao 266101, Peoples R China
5.Henan Univ, Key Lab Plant Stress Biol, Kaifeng 475004, Peoples R China
关键词： aphid; bacterial symbiont; densovirus; antiviral defense
期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：6.1； 五年影响因子：6.3 ）
ISSN： 0021-8561
年卷期： 2024 年
页码：
收录情况： SCI
摘要： Sitobion miscanthi L-type symbiont (SMLS) is a bacterial symbiont commonly found in the wheat aphid S. miscanthi. A new aphid densovirus, S. miscanthi densovirus (SmDV), was recently identified in S. miscanthi. In this study, the similar cellular tropism of SmDV and SMLS in aphid embryos was uncovered using in situ hybridization. SmDV infection significantly decreased the longevity and number of S. miscanthi offspring. However, the SmDV titers were significantly suppressed after SMLS transmission, thus reducing the negative effects of SmDV infection on S. miscanthi fitness. Moreover, an integrative analysis of RNA-seq datasets showed that SMLS inhibited the expression of genes related to the phosphatidylinositol 3-kinase (Pl3K)/Akt pathways and further induced the expression of antiviral factors associated with the apoptosis and FoxO signaling pathways. These results indicate that SMLS mediates host antiviral defenses to inhibit the propagation of SmDV, which was further verified by an RNA interference assay.
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