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Plant-Mediated Horizontal Transmission of Hamiltonella defensa in the Wheat Aphid Sitobion miscanthi
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2018-12-05 00:00:00 , DOI: 10.1021/acs.jafc.8b04828 Qian Li 1, 2 , Jia Fan 1 , Jingxuan Sun 1 , Man-Qun Wang 2 , Julian Chen 1
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2018-12-05 00:00:00 , DOI: 10.1021/acs.jafc.8b04828 Qian Li 1, 2 , Jia Fan 1 , Jingxuan Sun 1 , Man-Qun Wang 2 , Julian Chen 1
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Hamiltonella defensa is mainly vertically transmitted, but evidence suggests that horizontal transmission may occur. Here, the first case of plant-mediated horizontal transmission of H. defensa between wheat aphids, Sitobion miscanthi, was reported. H. defensa was harbored in sheath cells, secondary bacteriocytes, and hemolymph. After Hamiltonella-infected aphids fed on wheat leaves, H. defensa was observed in aphid stylets and plant phloem. H. defensa persisted in wheat leaves for at least 10 days. Most Hamiltonella-uninfected aphids became infected with H. defensa after sustained feeding on infected plant leaves and showed almost 100% stable vertical transmission over the next five generations. These horizontal transmission experiments were replicated using two other plants, rice and corn, and two different wheat aphid species, Rhopalosiphum padi and Schizaphis graminum. Surprisingly, aphid feeding induced plant infection only locally rather than systemically in leaves. Our findings indicate that plants may act as horizontal transmission intermediaries, contributing to the ubiquity of the otherwise maternally inherited H. defensa.
中文翻译：
植物介导的小麦蚜虫Sitobion miscanthi中的Hamiltonella defensa水平传播。
哈密尔顿氏菌主要通过垂直传播，但有证据表明可能发生水平传播。在这里，报道了第一例植物介导的H.defensa水平在小麦蚜虫之间的传播，即Sitobion miscanthi。防御H. defensa藏在鞘细胞，次级细菌细胞和血淋巴中。用小麦叶片感染哈密顿氏菌感染的蚜虫后，在蚜虫的管心和植物韧皮部中观察到了H. defensa。H. defensa在小麦叶片中持续至少10天。大多数未感染汉密尔顿杆菌的蚜虫都感染了H. defensa持续喂食受感染的植物叶片后，在接下来的五代中表现出几乎100％的稳定垂直传播。使用另外两种植物水稻和玉米以及两种不同的小麦蚜虫物种Rhopalosiphum padi和Schizaphis graminum复制了这些水平传播实验。令人惊讶的是，蚜虫进食仅在局部而不是系统地在叶片中引起植物感染。我们的发现表明，植物可能充当水平传播的中介，导致原本由母亲继承的H. defensa普遍存在。
更新日期：2018-12-05
中文翻译：
植物介导的小麦蚜虫Sitobion miscanthi中的Hamiltonella defensa水平传播。
哈密尔顿氏菌主要通过垂直传播，但有证据表明可能发生水平传播。在这里，报道了第一例植物介导的H.defensa水平在小麦蚜虫之间的传播，即Sitobion miscanthi。防御H. defensa藏在鞘细胞，次级细菌细胞和血淋巴中。用小麦叶片感染哈密顿氏菌感染的蚜虫后，在蚜虫的管心和植物韧皮部中观察到了H. defensa。H. defensa在小麦叶片中持续至少10天。大多数未感染汉密尔顿杆菌的蚜虫都感染了H. defensa持续喂食受感染的植物叶片后，在接下来的五代中表现出几乎100％的稳定垂直传播。使用另外两种植物水稻和玉米以及两种不同的小麦蚜虫物种Rhopalosiphum padi和Schizaphis graminum复制了这些水平传播实验。令人惊讶的是，蚜虫进食仅在局部而不是系统地在叶片中引起植物感染。我们的发现表明，植物可能充当水平传播的中介，导致原本由母亲继承的H. defensa普遍存在。
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