Herbivore Defence Compounds Occur in Pollen and Reduce Bumblebee Colony Fitness
Herbivore Defence Compounds Occur in Pollen and Reduce Bumblebee Colony Fitness
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DOI：
10.1007/s10886-014-0467-4
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发表时间：
2014-08-01
影响因子：
2.3
通讯作者：
Stevenson, Philip C.
中科院分区：
文献类型：
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作者：
Arnold, Sarah E. J.;Peralta Idrovo, M. Eduardo;Stevenson, Philip C.
植物中的植食性防御化学物质可以影响更高的营养级，如捕食者和寄生虫，但对传粉者的影响一直被忽视。我们表明，防御性植物化学物质可以损害传粉者的健身时，在花粉中表达。作物羽扇豆（来自欧洲和南美洲的羽扇豆属物种）在营养组织中积累有毒的喹诺里西啶生物碱，赋予对植食性害虫如蚜虫的抗性。我们确定了羽扇豆花粉中的生物碱羽扇豆碱及其衍生物，然后将这种化合物以生态相关浓度提供给熊蜂（熊蜂）花粉中的无蜂王小菌落，以确定在这些作物上觅食如何影响蜂群健康和健身。更少的男性所产生的小菌落提供羽扇豆碱处理的花粉，他们显着小于对照组。这种对男性的影响是没有联系的偏好，工人愿意喂养羽扇豆碱处理的花粉幼虫，即使它是有害的殖民地健康。农业系统包括大型单一栽培的作物培育的草食动物的阻力，可以暴露通才传粉有害水平的植物化合物，因此，必须考虑更广泛的环境影响的作物抗性。
Herbivory defence chemicals in plants can affect higher trophic levels such as predators and parasitoids, but the impact on pollinators has been overlooked. We show that defensive plant chemicals can damage pollinator fitness when expressed in pollen. Crop lupins (Lupinus species from Europe and South America) accumulate toxic quinolizidine alkaloids in vegetative tissues, conferring resistance to herbivorous pests such as aphids. We identified the alkaloid lupanine and its derivatives in lupin pollen, and then provided this compound at ecologically-relevant concentrations to queenless microcolonies of bumblebees (Bombus terrestris) in their pollen to determine how foraging on these crops may impact bee colony health and fitness. Fewer males were produced by microcolonies provided with lupanine-treated pollen and they were significantly smaller than controls. This impact on males was not linked to preference as workers willingly fed lupanine-treated pollen to larvae, even though it was deleterious to colony health. Agricultural systems comprising large monocultures of crops bred for herbivore resistance can expose generalist pollinators to deleterious levels of plant compounds, and the broader environmental impacts of crop resistance must thus be considered.