麦蚜循回传毒过程的超微结构研究  

Ultrastructure of Circulative BYDV Transmission by Wheat Aphids

作　　者：吴云锋[1] 

机构地区：[1]西北农业大学植保系,杨陵712100

出　　处：《西北农业学报》1999年第3期25-28,共4页Acta Agriculturae Boreali-occidentalis Sinica

基　　金：国家863 青年基金;国家攀登计划;植物病虫害生物学国家重点实验室基金

摘　　要：对禾谷缢管蚜和麦长管蚜传播小麦黄矮病毒ＧＰＶ 株系的超微结构观察发现：禾谷缢管蚜取食８ｈ 时，病毒进入蚜虫后肠肠腔中，１２ ～２４ ｈ 后进入后肠细胞质，ＧＰＶ 与肠内壁顶端细胞膜接触，接触部位细胞膜逐渐下陷，形成小穴，向内凹陷发育为管状泡囊，而后进入血淋巴液，当病毒被附唾液腺吸收后蚜虫将病毒排吐进入唾液管中。当蚜虫在健株上取食时回吐唾液，将病毒传给植物，完成传毒过程。ＧＰＶ在介体禾谷缢管蚜体内的循回期约为１２ ｈ。麦长管蚜取食４８ ｈ 后，才在后肠肠腔和后肠细胞质中观察到病毒粒子。Ultrastructural studies have shown the circulative routes of GPV in aphids.When Rhopalosiphum padi and Sitobion avenae feed on GPV infected oats, GPV virions from plant sap move into hindgut lumen for 8 h, then into cytoplasm for 6 h, and which must first contact the gut cell membrane to initiate virus absorption by cellular endocytosis, attachment induce membrane invagination around the virions forming coat pits. Coated pits continue to invaginate evently pinching off to form coated vesicles which transport the virion to hemocoel. and ASG of vector R.padi. The virions are then free to move with salivary secretions into the salivary duct and out of the aphid stylet during feeding. S.avenae acqusiton GPV for 48 h, GPV virons present in hindgut.

关 键 词：麦蚜 禾谷缢管蚜 GPV 循回传播 超微结构 

分 类 号：S435.122.2[农业科学—农业昆虫与害虫防治]