Response of a phytoseiid predator to herbivore-Induced plant volatiles: Selection on attraction and effect on prey exploitation
Response of a phytoseiid predator to herbivore-Induced plant volatiles: Selection on attraction and effect on prey exploitation
复制标题
植物性捕食者对草食动物诱导的植物挥发物的反应：对吸引力的选择和对猎物利用的影响
作者：
D. Margolies;M. Sabelis;J. Boyer
被草食性叶螨侵染的豆类植物会释放出对植物有吸引力的挥发性化学物质。 persimilis，红蜘蛛的捕食者。在 Y 管嗅觉计测试中，我们评估了捕食者对食草动物诱导的植物挥发物的反应中遗传成分的参与情况。重复的双向选择导致在一代选择后吸引力显着增加，但即使在三代选择后也没有减少，表明捕食者对草食动物诱导的植物挥发物的感知或反应存在显着但不平衡的附加遗传变异。选定的品系对食物匮乏的反应与未选定的群体不同，这表明它们的内部状态和对植物挥发物的反应之间存在相互作用。选定的品系在与当地猎物利用相关的行为方面也与未选择的品系不同，例如停留时间、猎物消耗和繁殖。在较低的猎物密度下，P.与未选择的群体相比，来自两个“+”系的 persimilis 使叶螨感染的叶子更快，并且消耗的猎物卵更少。定义捕食者搜索行为的嗅觉成分是理解植物挥发物对捕食者觅食效率影响的一步。通过选择对草食动物诱导的植物挥发物的吸引力不同的品系，我们可以通过实验研究这种行为、捕食者觅食效率以及当地和区域捕食者-猎物种群动态之间的联系。捕食者对植物挥发物的反应中显着的加性遗传变异对三营养环境中进化的影响也仍有待揭示。
Bean plants infested with herbivorous spider mites emit volatile chemicals that are attractive toP. persimilis, a predator of spider mites. In Y-tube olfactometer tests we evaluated involvement of a genetic component in predator response to herbivore-induced plant volatiles. Replicated bidirectional selection resulted in a significant increase in attraction after one generation of selection, but no decrease even after three generations of selection, indicating significant, but unbalanced, additive genetic variation in predator perception of, or response to, herbivore-induced plant volatiles. Selected lines responded differently than an unselected population to food deprivation, pointing to an interaction between their internal state and response to plant volatiles. Selected lines also differed from unselected ones in behaviors associated with local prey exploitation, such as residence time, prey consumption, and reproduction. At lower prey densities,P. persimilis from both “+” lines left spider mite-infested leaves more rapidly and consumed fewer prey eggs than an unselected population. Defining olfactory components of predator search behavior is one step in understanding the effect of plant volatiles on predator foraging efficiency. By selecting lines differing in their attraction to herbivore-induced plant volatiles we may experimentally investigate the link between this behavior, predator foraging efficiency, and local and regional predator-prey population dynamics. The impact of significant additive genetic variation in predator response to plant volatiles on evolution in a tritrophic context also remains to be uncovered.
果蝇嗅觉行为的遗传分析：新筛选产生 ota 突变体。
影响因子：
3.3
作者：
Woodard,C;Huang,T;Sun,H;Helfand,SL;Carlson,J
通讯作者：
Carlson,J