Dominance of Zygosaccharomyces and shifts in bacterial pathways: Effects of antimicrobials on composition and diversity of the Ceratitis capitata bacterial and fungal microbiome

作者：María Cecilia Rasuk, Alfonsina Palladini, Andrea Moyano, Viviana Díaz, Antonella Giudice, Gisela Castillo, Solana Abraham, Juan Rull, Anja Poehlein, Rolf Daniel, Julián Rafael Dib · 发表于：PLoS ONE · 年份：2025 · DOI：10.1371/journal.pone.0335811 · 被引用次数：1 · 研究领域：Insect behavior and control techniques、Insect symbiosis and bacterial influences、Insect Utilization and Effects

The Mediterranean fruit fly (Ceratitis capitata Wied.) is an agricultural pest of significant economic importance. This species has been globally managed using the Sterile Insect Technique (SIT). Insects, including tephritid flies, harbor a diverse gut microbiota that plays critical roles in their physiology, behavior, and overall fitness, suggesting that microbial communities may profoundly influence the biology of this pest. The aim of this study was to characterize the fungal and bacterial gut microbial communities of C. capitata from Tucumán, Argentina, and to assess their response to antimicrobial treatment using amplicon-based 16S rRNA gene and ITS region sequencing. Both control and treated flies were dominated by Proteobacteria (bacteria) and Zygosaccharomyces (fungi). Antimicrobial treatment induced significant shifts in bacterial and fungal composition, reducing diversity and altering gut community structure. Untreated flies exhibited a diverse and structured bacterial gut community dominated by the family Enterobacteriaceae, while antibiotic-treated communities were dominated by Rhizobiaceae. Despite these shifts, fungal communities in both treated and untreated groups were consistently dominated by the genus Zygosaccharomyces. Functional predictions revealed notable changes in metabolic pathways following antibiotic treatment, including increased gene abundance for ABC transporters and the phosphotransferase system, and decreased representation of genes involved i...