Boquel S, Delayen C, Couty A, Giordanengo P, Ameline A
Université de Picardie Jules Verne, Laboratoire de Biologie des Entomophages, 80039 Amiens Cedex, France, and GIE, Station de Recherche et de Création Variétale du Comité Nord, 76110 Bretteville-du-Grand-Caux, France.
Université de Picardie Jules Verne, Laboratoire de Biologie des Entomophages, 80039 Amiens Cedex, France.
Plant Dis. 2012 Jan;96(1):82-86. doi: 10.1094/PDIS-06-11-0499.
The effects of the infection of potato (Solanum tuberosum) plants by the nonpersistent Potato virus Y (PVY) were studied on the host plant colonization behavior of different colonizing (Myzus persicae) and noncolonizing (Aphis fabae, Brevicoryne brassicae, and Sitobion avenae) aphid species. The underlying questions of this study were to know how aphids respond when faced with PVY-infected plants and whether plant infection can modify the aphid behavior involved in PVY spread. Short-range orientation behavior was observed using a dual-choice set-up and aphid feeding behavior was monitored using the electrical penetration graph technique. None of the aphid species discriminated between healthy and PVY-infected plants. Nevertheless, most individuals of M. persicae landed on and probed only in one plant whereas noncolonizing aphid species exhibited interplant movements. Study of the aphid feeding behavior showed that PVY infection essentially modified phloem and xylem ingestion. M. persicae and S. avenae exhibited an increased duration of phloem phases on PVY-infected plants whereas A. fabae showed a decreased duration of phloem phases that benefited from an increased duration of xylem ingestion phases. None of these parameters were changed in B. brassicae. These data present evidence that aphids can respond to plants infected by nonpersistent viruses. Such behavioral modifications are discussed within the context of PVY spread in potato crops.
研究了非持久性马铃薯Y病毒（PVY）感染马铃薯（Solanum tuberosum）植株对不同定殖型（桃蚜）和非定殖型（豆蚜、甘蓝蚜和麦长管蚜）蚜虫物种在寄主植物上定殖行为的影响。本研究的基本问题是了解蚜虫面对感染PVY的植株时如何做出反应，以及植株感染是否会改变参与PVY传播的蚜虫行为。使用双选装置观察近距离定向行为，并使用电穿透图技术监测蚜虫取食行为。没有一种蚜虫能够区分健康植株和感染PVY的植株。然而，大多数桃蚜个体只落在一株植物上并仅在该株植物上进行刺探，而非定殖型蚜虫物种则表现出在不同植株间移动。对蚜虫取食行为的研究表明，PVY感染主要改变了韧皮部和木质部的取食情况。桃蚜和麦长管蚜在感染PVY的植株上韧皮部取食阶段的持续时间增加，而豆蚜韧皮部取食阶段的持续时间减少，其木质部取食阶段的持续时间增加。甘蓝蚜的这些参数均未发生变化。这些数据表明蚜虫能够对感染非持久性病毒的植株做出反应。在PVY在马铃薯作物中的传播背景下讨论了这种行为改变。
