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Black Soldier Fly Larvae Adapt to Different Food Substrates through Morphological and Functional Responses of the Midgut

文献类型： 外文期刊

作者： Bonelli, Marco 1 ; Bruno, Daniele 2 ; Brilli, Matteo 1 ; Gianfranceschi, Novella 1 ; Tian, Ling 4 ; Tettamanti, Gia 1 ;

作者机构： 1.Univ Milan, Dept Biosci, I-20133 Milan, Italy

2.Univ Insubria, Dept Biotechnol & Life Sci, I-21100 Varese, Italy

3.Univ Milan, Pediat Clin Res Ctr Romeo & Enr Invernizzi, I-20133 Milan, Italy

4.South China Agr Univ, Coll Anim Sci, Guangdong Prov Key Lab Agroanim Genom & Mol Breed, Guangdong Prov Sericulture & Mulberry Engn Res Ct, Guangzhou 510642, Peoples R China

5.Univ Napoli Federico II, BAT Ctr Interuniv Ctr Studies Bioinspired Agroenv, I-80138 Naples, Italy

6.Univ Napoli Federico II, Dept Agr Sci, I-80055 Portici, NA, Italy

关键词： Hermetia illucens; insect midgut; post-ingestion regulation; diet composition; midgut transcriptome; waste management

期刊名称：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES （ 影响因子：5.923； 五年影响因子：6.132 ）

ISSN：

年卷期： 2020 年 21 卷 14 期

页码：

收录情况： SCI

摘要： Modulation of nutrient digestion and absorption is one of the post-ingestion mechanisms that guarantees the best exploitation of food resources, even when they are nutritionally poor or unbalanced, and plays a pivotal role in generalist feeders, which experience an extreme variability in diet composition. Among insects, the larvae of black soldier fly (BSF),Hermetia illucens, can grow on a wide range of feeding substrates with different nutrient content, suggesting that they can set in motion post-ingestion processes to match their nutritional requirements. In the present study we address this issue by investigating how the BSF larval midgut adapts to diets with different nutrient content. Two rearing substrates were compared: a nutritionally balanced diet for dipteran larvae and a nutritionally poor diet that mimics fruit and vegetable waste. Our data show that larval growth performance is only moderately affected by the nutritionally poor diet, while differences in the activity of digestive enzymes, midgut cell morphology, and accumulation of long-term storage molecules can be observed, indicating that diet-dependent adaptation processes in the midgut ensure the exploitation of poor substrates. Midgut transcriptome analysis of larvae reared on the two substrates showed that genes with important functions in digestion and absorption are differentially expressed, confirming the adaptability of this organ.

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