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• W3199371373 abstract "Termites are eusocial insects that host a range of prokaryotic and eukaryotic gut symbionts and can differentiate into a range of caste phenotypes. Soldier caste differentiation from termite workers follows two successive molts (worker-presoldier-soldier) that are driven at the endocrine level by juvenile hormone (JH). Although physiological and eusocial mechanisms tied to JH signaling have been studied, the role of gut symbionts in the caste differentiation process is poorly understood. Here, we used the JH analog methoprene in combination with the antibiotic kanamycin to manipulate caste differentiation and gut bacterial loads in Reticulitermes flavipes termites via four bioassay treatments: kanamycin, methoprene, kanamycin+methoprene, and an untreated (negative) control. Bioassay results demonstrated a significantly higher number of presoldiers in the methoprene treatment, highest mortality in kanamycin+methoprene treatment, and significantly reduced protist numbers in all treatments except the untreated control. Bacterial 16S rRNA gene sequencing provided alpha and beta diversity results that mirrored bioassay findings. From ANCOM analysis, we found that several bacterial genera were differentially abundant among treatments. Finally, follow-up experiments showed that if methoprene and kanamycin or untreated termites are placed together, zero or rescued presoldier initiation, respectively, occurs. These findings reveal that endogenous JH selects for symbiont compositions required to successfully complete presoldier differentiation. However, if the gut is voided before the influx of JH, it cannot select for the necessary symbionts that are crucial for molting. Based on these results, we are able to provide a novel example of linkages between gut microbial communities and host phenotypic plasticity." @default.
• W3199371373 created "2021-09-27" @default.
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• W3199371373 date "2021-10-01" @default.
• W3199371373 modified "2023-09-27" @default.
• W3199371373 title "Regulation of host phenotypic plasticity by gut symbiont communities in the Eastern Subterranean termite (Reticulitermes flavipes Kollar)" @default.
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• W3199371373 doi "https://doi.org/10.1242/jeb.242553" @default.
• W3199371373 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34515310" @default.
• W3199371373 hasPublicationYear "2021" @default.
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