Aphid orientation and performance in glasshouses under different UV-A/UV-B radiation regimes
Aphid orientation and performance in glasshouses under different UV-A/UV-B radiation regimes
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DOI：
10.1111/eea.12583
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发表时间：
2017-06-01
影响因子：
1.9
通讯作者：
Fereres, Alberto
中科院分区：
文献类型：
--
作者：
Dader, Beatriz;Moreno, Aranzazu;Fereres, Alberto
导致寄主选择和着陆的视觉线索对蚜虫非常重要，有证据表明，飞行活动非常依赖于环境中的紫外线（UV）-A辐射。同时，对昆虫植物宿主的研究表明，UV-B成分可以通过次级代谢物化学的变化来阻止一些害虫。在这里，我们研究了紫外线（UV-A/UV-B）辐射控制温室环境中害虫的潜力。我们首先研究了人工暴露于UV-B以及引发辣椒（Capsicum annuum L.，茄科）与绿色桃蚜适应性的关系。UV-B引起叶片次生代谢产物和可溶性碳水化合物的积累，并刺激光合色素的合成。然而，UV-B没有影响叶片蛋白质含量和蚜虫的性能不受影响。接下来，我们研究了如何改变UV-A/UV-B的比例环境影响蚜虫的方向和空间分布随着时间的推移，无论是直接或通过暴露植物补充紫外线引入昆虫之前。蚜虫直接定居和分散在他们的寄主辣椒植物更容易在补充UV-A和UV-B的存在。在对照处理与环境温室UV-A和UV-B，昆虫仍然更聚集。此外，昆虫被吸引到辣椒预先暴露于补充UV-A和UV-B辐射。我们的研究结果表明，抑制UV-A和UV-B内的保护环境减少蚜虫的殖民和扩散。此外，适度暴露的辣椒幼苗补充UV-B辐射的应用程序可以帮助保护从植食性昆虫的殖民化。
Visual cues leading to host selection and landing are of major importance for aphids and evidence suggests that flight activity is very dependent on ultraviolet (UV)-A radiation in the environment. At the same time research on insect plant hosts suggest that the UV-B component can deter some pests via changes in secondary metabolite chemistry. Here, we examine the potential of UV (UV-A/UV-B) radiation to control insect pests in the glasshouse environment. We first examined artificial exposure to UV-B and the potential to trigger morphological and biochemical modifications in pepper (Capsicum annuum L., Solanaceae) with implications for the fitness of green peach aphid, Myzus persicae Sulzer (Hemiptera: Aphididae). UV-B caused accumulation of leaf secondary metabolites and soluble carbohydrates, and stimulated photosynthetic pigments. However, UV-B did not impact on foliar protein content and aphid performance was unaffected. Next, we studied how altering the UV-A/UV-B ratio environment affected aphid orientation and spatial distribution over time, either directly or by exposing plants to supplemental UV before insect introduction. Aphids directly settled and dispersed on their host pepper plants more readily in the presence of supplemental UV-A and UV-B. In the control treatment with ambient glasshouse UV-A and UV-B, insects remained more aggregated. Furthermore, insects were less attracted to peppers pre-exposed to supplemental UV-A and UV-B radiation. Our results suggest that suppression of UV-A and UV-B inside the protected environment reduces aphid colonization and dispersal. Furthermore, application of moderate exposure of young pepper plants to supplemental UV-B radiation could aid in protection from the colonization by phytophagous insects.