Population differences in host plant preference and the importance of yeast and plant substrate to volatile composition.
Population differences in host plant preference and the importance of yeast and plant substrate to volatile composition.
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DOI：
10.1002/ece3.2993
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发表时间：
2017-06
影响因子：
2.6
通讯作者：
Rollmann SM
中科院分区：
文献类型：
--
作者：
Date P;Crowley-Gall A;Diefendorf AF;Rollmann SM
环境之间的不同选择可能会导致生物体行为的变化。在许多昆虫中，挥发性化合物是识别寄主植物的主要手段，植物可用性的变化可能导致寄主偏好的变化。植物基质和微生物都会影响这种行为，宿主植物的选择也会影响生物体的性能。在 Drosophila mojavensis 中，四个地理上隔离的种群各自使用不同的仙人掌作为摄食和产卵基质，并通过散发的挥发性气味剂的成分来识别这些仙人掌。行为测试显示，D. mojavensis 种群对天然寄主植物的偏好程度各不相同。相对于其他仙人掌选择，莫哈韦种群的雌性对寄主植物桶形仙人掌表现出明显的偏好。当果蝇在非寄主植物的仙人掌之间进行选择时，所有种群对桶形仙人掌和风琴管仙人掌的偏好总体低于仙人掌和仙人掌。挥发性顶空成分受仙人掌基质、微生物群落和基质与微生物相互作用的影响。种群之间生存力、发育时间、胸部长度和干体重存在差异，并且取决于仙人掌基质和种群与仙人掌之间的相互作用。然而，没有观察到行为偏好和表现之间存在明显的关联。这项研究强调了昆虫、寄主植物和微生物群落之间复杂的相互作用以及介导昆虫寄主植物偏好行为的因素。
Divergent selection between environments can result in changes to the behavior of an organism. In many insects, volatile compounds are a primary means by which host plants are recognized and shifts in plant availability can result in changes to host preference. Both the plant substrate and microorganisms can influence this behavior, and host plant choice can have an impact on the performance of the organism. In Drosophila mojavensis, four geographically isolated populations each use different cacti as feeding and oviposition substrates and identify those cacti by the composition of the volatile odorants emitted. Behavioral tests revealed D. mojavensis populations vary in their degree of preference for their natural host plant. Females from the Mojave population show a marked preference for their host plant, barrel cactus, relative to other cactus choices. When flies were given a choice between cacti that were not their host plant, the preference for barrel and organ pipe cactus relative to agria and prickly pear cactus was overall lower for all populations. Volatile headspace composition is influenced by the cactus substrate, microbial community, and substrate‐by‐microorganism interactions. Differences in viability, developmental time, thorax length, and dry body weight exist among populations and depend on cactus substrate and population‐by‐cactus interactions. However, no clear association between behavioral preference and performance was observed. This study highlights a complex interplay between the insect, host plant, and microbial community and the factors mediating insect host plant preference behavior.