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<p>The pepper weevil (<i>Anthonomus eugenii</i> Cano, Coleoptera: Curculionidae) is a highly destructive pest of pepper crops and can cause complete yield loss. Insect-associated microbiota supports host digestion, optimizes nutrition, and enhances tolerances to external stressors; however, the microbiome of the pepper weevil remains poorly characterized. We used 16&#xa0;s rRNA gene amplicon sequencing to profile microbial diversity across developmental stages of <i>A. eugenii</i> and to infer the metabolic potential of its microbiota. Third-instar larvae and pupae harbored greater diversity than other stages. <i>Enterobacteriaceae</i> and <i>Yersiniaceae</i> were the most common prevalent families. At the genus level, <i>Enterobacter</i> and <i>Klebsiella</i> dominated larval and adult stages, whereas <i>Serratia</i> was associated with pupae. Predicted functional profiles indicated that, despite compositional shifts during development, metabolic capacities were largely conserved, consistent with functional redundancy, metabolic capacities were largely conserved, consistent with functional redundancy. Inferred pathways were mainly related to the biosynthesis and metabolism of carbohydrates and amino acids. To our knowledge, this is the first stage-resolved characterization of the <i>A. eugenii</i> microbiota and provides a foundation for leveraging gut-microbiota modulation in pepper weevil management.</p>

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Microbiota dynamics across different developmental stages of the pepper weevil (Anthonomus eugenii Cano)

  • 期刊论文

  • 发表日期：

    2025年10月22日

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  • Carmen Y. Pelayo-Ayón,
  • Jean P. González-Gómez,
  • Roberto Gastelum-Luque,
  • Nohelia Castro-del Campo,
  • Juan D. Lira-Morales,
  • Cristobal Chaidez

摘要

The pepper weevil (Anthonomus eugenii Cano, Coleoptera: Curculionidae) is a highly destructive pest of pepper crops and can cause complete yield loss. Insect-associated microbiota supports host digestion, optimizes nutrition, and enhances tolerances to external stressors; however, the microbiome of the pepper weevil remains poorly characterized. We used 16 s rRNA gene amplicon sequencing to profile microbial diversity across developmental stages of A. eugenii and to infer the metabolic potential of its microbiota. Third-instar larvae and pupae harbored greater diversity than other stages. Enterobacteriaceae and Yersiniaceae were the most common prevalent families. At the genus level, Enterobacter and Klebsiella dominated larval and adult stages, whereas Serratia was associated with pupae. Predicted functional profiles indicated that, despite compositional shifts during development, metabolic capacities were largely conserved, consistent with functional redundancy, metabolic capacities were largely conserved, consistent with functional redundancy. Inferred pathways were mainly related to the biosynthesis and metabolism of carbohydrates and amino acids. To our knowledge, this is the first stage-resolved characterization of the A. eugenii microbiota and provides a foundation for leveraging gut-microbiota modulation in pepper weevil management.