Metatranscriptomic analysis of the gut microbiome of black soldier fly larvae reared on lignocellulose-rich fiber diets unveils key lignocellulolytic enzymes

Frontiers in Microbiology

Microbiology

Timothy D. H. Bugg¹  Gerald Mboowa²  Juan C. Paredes²  Caleb Kibet³  John Njogu³  Chrysantus M. Tanga³  Oscar Mwaura³  Daniel Masiga³  Eric G. Kariuki⁴ 

[1] Department of Chemistry, School of Life Sciences, University of Warwick, Coventry, United Kingdom;Department of Immunology and Molecular Biology, Makerere University, Kampala, Uganda;International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya;International Centre of Insect Physiology and Ecology (icipe), Nairobi, Kenya;Department of Immunology and Molecular Biology, Makerere University, Kampala, Uganda;

关键词: Hermetia illucens;    RNA-Sequencing;    substrate specificity;    bioprospecting;    bacterial metabolism;   

DOI  :  10.3389/fmicb.2023.1120224

 received in 2022-12-09, accepted in 2023-04-03,  发布年份 2023

来源: Frontiers

【 摘 要 】

Recently, interest in the black soldier fly larvae (BSFL) gut microbiome has received increased attention primarily due to their role in waste bioconversion. However, there is a lack of information on the positive effect on the activities of the gut microbiomes and enzymes (CAZyme families) acting on lignocellulose. In this study, BSFL were subjected to lignocellulose-rich diets: chicken feed (CF), chicken manure (CM), brewers’ spent grain (BSG), and water hyacinth (WH). The mRNA libraries were prepared, and RNA-Sequencing was conducted using the PCR-cDNA approach through the MinION sequencing platform. Our results demonstrated that BSFL reared on BSG and WH had the highest abundance of Bacteroides and Dysgonomonas. The presence of GH51 and GH43_16 enzyme families in the gut of BSFL with both α-L-arabinofuranosidases and exo-alpha-L-arabinofuranosidase 2 were common in the BSFL reared on the highly lignocellulosic WH and BSG diets. Gene clusters that encode hemicellulolytic arabinofuranosidases in the CAZy family GH51 were also identified. These findings provide novel insight into the shift of gut microbiomes and the potential role of BSFL in the bioconversion of various highly lignocellulosic diets to fermentable sugars for subsequent value-added products (bioethanol). Further research on the role of these enzymes to improve existing technologies and their biotechnological applications is crucial.

【 授权许可】

Unknown   
Copyright © 2023 Kariuki, Kibet, Paredes, Mboowa, Mwaura, Njogu, Masiga, Bugg and Tanga.

【 图 表 】

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