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Xylocopa caerulea and Xylocopa auripennis harbor a homologous gut microbiome related to that of eusocial bees

文献类型： 外文期刊

作者： Gu, Yifan 1 ; Han, Wensu 1 ; Wang, Yuquan 5 ; Liang, Danlei 3 ; Gao, Jinglin 1 ; Zhong, Yihai 1 ; Zhao, Shan 1 ; Wang, Shijie 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Environm & Plant Protect Inst, Haikou, Peoples R China

2.China Agr Univ, Sanya Inst, Sanya, Peoples R China

3.China Agr Univ, Coll Plant Protect, Dept Entomol, Beijing, Peoples R China

4.Chinese Acad Trop Agr Sci, Bee Ind Technol Res Ctr, Haikou, Peoples R China

5.Hainan Univ, Coll Plant Protect, Haikou, Peoples R China

关键词： carpenter bees; gut microbiota; bacteria symbiosis; Candidatus Schmidhempelia; Bombiscardovia; eusocial bees; Bombilactobacillus

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：5.2； 五年影响因子：6.2 ）

ISSN：

年卷期： 2023 年 14 卷

页码：

收录情况： SCI

摘要： BackgroundEusocial bees, such as bumblebees and honey bees, harbor host-specific gut microbiota through their social behaviors. Conversely, the gut microbiota of solitary bees is erratic owing to their lack of eusocial activities. Carpenter bees (genus Xylocopa) are long-lived bees that do not exhibit advanced eusociality like honey bees. However, they often compete for nests to reproduce. Xylocopa caerulea and Xylocopa auripennis are important pollinators of wild plants on Hainan Island. Whether they have host-specific bacteria in their guts similar to eusocial bees remains unknown. MethodsWe targeted the bacterial 16S rRNA V3-V4 region to investigate the diversity of bacterial symbionts in the fore-midgut and hindgut of two carpenter bees, X. caerulea and X. auripennis. ResultsA maximum of 4,429 unique amplicon sequence variants (ASVs) were detected from all samples, belonging to 10 different phyla. X. caerulea and X. auripennis shared similar bacterial community profiles, with Lactobacillaceae, Bifidobacteriaceae, and Orbaceae being dominant in their entire guts. X. caerulea and X. auripennis harbor a highly conserved core set of bacteria, including the genera Candidatus Schmidhempelia and Bombiscardovia. These two bacterial taxa from carpenter bees are closely related to those isolated from bumblebees. The LEfSe analysis showed that Lactobacillaceae, Bifidobacteriaceae, and the genus Bombilactobacillus were significantly enriched in the hindguts of both carpenter bees. Functional prediction suggested that the most enriched pathways were involved in carbohydrate and lipid metabolism. ConclusionsOur results revealed the structure of the gut microbiota in two carpenter bees and confirmed the presence of some core bacterial taxa that were previously only found in the guts of social bees.

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