Changes in life history traits and transcriptional regulation of Coccinellini ladybirds in using alternative prey
Changes in life history traits and transcriptional regulation of Coccinellini ladybirds in using alternative prey
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Coccinellini瓢虫使用替代猎物时生活史特征的变化和转录调控
DOI：
10.1186/s12864-020-6452-0
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发表时间：
2020-01-14
期刊：
影响因子：
4.4
通讯作者：
Pang, Hong
中科院分区：
文献类型：
--
作者：
Chen, Mei-Lan;Huang, Yu-Hao;Pang, Hong
研究背景瓢虫属鞘翅目瓢虫科瓢虫属瓢虫属瓢虫科瓢虫属瓢虫属瓢虫它们中的大多数是专门的捕食者，而有些则可以捕食各种各样的猎物。作为通才的代表性群体，瓢虫族包括许多食蚜物种，但该族的成员也以其他半翅目昆虫为食，包括瓢虫，木虱和粉虱。因此，有几个物种是有效的生物防治剂或具有严重非靶效应的入侵物种。尽管他们的经济重要性，相对较少的是知道他们如何适应新的prey.ResultsIn这项研究中，比较的生活史特征和转录组的瓢虫喂初始（蚜虫）和替代猎物（粉蚧）进行了三个瓢虫种。替代猎物的使用大大降低了性能，这意味着显着延长的发展时间，降低存活率和成年体重。猎物的变化导致一组差异表达的基因编码chemosensory蛋白和消化和解毒enzymes.ConclusionsOur结果表明，这些通才不执行良好，当他们使用替代猎物作为唯一的营养来源。虽然它们的捕食能力可能创造了利用各种猎物的机会，但它们必须适应生理障碍，包括对猎物转移的化学感应、消化和解毒。这些发现挑战了瓢虫捕食者对非蚜虫害虫生物防治的影响，并提出了所谓专家非目标攻击的可能性。
BackgroundLadybird beetles (Coleoptera, Coccinellidae) are highly diverse in their feeding habits. Most of them are specialist feeders, while some can have a broad spectrum of prey. As a representative group of generalists, the tribe Coccinellini includes many aphidophagous species, but members of this tribe also feed on other hemipterous insects including coccids, psyllids and whiteflies. As a result, several species are effective biological control agents or invasive species with serious non-target effects. Despite their economic importance, relatively little is known about how they adapt to new prey.ResultsIn this study, comparisons of the life history traits and transcriptomes of ladybirds fed initial (aphids) and alternative prey (mealybugs) were performed in three Coccinellini species. The use of alternative prey greatly decreased performance, implied by the significantly prolonged development time and decreased survival rate and adult weight. Prey shifts resulted in a set of differentially expressed genes encoding chemosensory proteins and digestive and detoxifying enzymes.ConclusionsOur results suggest that these generalists do not perform well when they use alternative prey as the sole nutrition source. Although their capacity for predation might have created an opportunity to use varied prey, they must adapt to physiological obstacles including chemosensing, digestion and detoxification in response to a prey shift. These findings challenge the effect of Coccinellini predators on the biological control of non-aphid pests and suggest the possibility of non-target attacks by so-called specialists.