Diet and Host Genetics Drive the Bacterial and Fungal Intestinal Metatranscriptome of Gilthead Sea Bream

The gut microbiota is now recognised as a key target for improving aquaculture profit and sustainability, but we still lack insights into the activity of microbes in fish mucosal surfaces. In the present study, a metatranscriptomic approach was used to reveal the expression of gut microbial genes in...

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Published inFrontiers in microbiology Vol. 13; p. 883738
Main Authors Naya-Català, Fernando, Piazzon, M Carla, Calduch-Giner, Josep A, Sitjà-Bobadilla, Ariadna, Pérez-Sánchez, Jaume
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Media S.A 06.05.2022
Subjects
archaea
bacteria
fungi
metatranscriptome
Microbiology
teleost fish
virus
metatranscriptome
nutrition
bacteria
fungi
selective breeding
teleost fish
virus
archaea
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Summary:The gut microbiota is now recognised as a key target for improving aquaculture profit and sustainability, but we still lack insights into the activity of microbes in fish mucosal surfaces. In the present study, a metatranscriptomic approach was used to reveal the expression of gut microbial genes in the farmed gilthead sea bream. Archaeal and viral transcripts were a minority but, interestingly and contrary to rRNA amplicon-based studies, fungal transcripts were as abundant as bacterial ones, and increased in fish fed a plant-enriched diet. This dietary intervention also drove a differential metatranscriptome in fish selected for fast and slow growth. Such differential response reinforced the results of previously inferred metabolic pathways, enlarging, at the same time, the catalogue of microbial functions in the intestine. Accordingly, vitamin and amino acid metabolism, and rhythmic and symbiotic processes were mostly shaped by bacteria, whereas fungi were more specifically configuring the host immune, digestive, or endocrine processes.
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Reviewed by: Allen Richard Place, University of Maryland Center for Environmental Science (UMCES), United States; Raul Enrique Valle-Gough, Autonomous University of Baja California, Mexico
This article was submitted to Microorganisms in Vertebrate Digestive Systems, a section of the journal Frontiers in Microbiology
Edited by: Harold J. Schreier, University of Maryland, Baltimore, United States
ISSN:1664-302X
1664-302X
DOI:10.3389/fmicb.2022.883738