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- W2767991844 abstract "Understanding the interaction between host plant chemistry, the immune response, and insect pathogens can shed light on host plant use by insect herbivores. In this study, we focused on how interactions between the insect immune response and plant secondary metabolites affect the response to a viral pathogen. Based upon prior research, we asked whether the buckeye caterpillar, Junonia coenia (Nymphalidae), which specializes on plants containing iridoid glycosides (IGs), is less able to resist the pathogenic effects of a densovirus infection when feeding on plants with high concentrations of IGs. In a fully factorial design, individuals were randomly assigned to three treatments, each of which had two levels: (1) exposed to the densovirus versus control, (2) placed on a plant species with high concentrations of IGs (Plantago lanceolata, Plantaginaceae) versus low concentrations of IGs (P. major), and (3) control versus surface sterilized to exclude surface microbes that may contribute to viral resistance. We measured phenoloxidase (PO) activity, hemocyte counts, and gut bacterial diversity (16S ribosomal RNA) during the fourth larval instar, as well as development time, pupal weight, and survival to adult. Individuals infected with the virus were immune-suppressed (as measured by PO response and hemocyte count) and developed significantly faster than virus-free individuals. Contrary to our predictions, mortality was significantly less for virus challenged individuals reared on the high IG plant compared to the low IG plant. This suggests that plant secondary metabolites can influence survival from viral infection and may be associated with activation of PO. Removing egg microbes did not affect the immune response or survival of the larvae. In summary, these results suggest that plant secondary metabolites are important for survival against a viral pathogen. Even though the PO response was better on the high IG plant, the extent to which this result contributes to survival against the virus needs further investigation." @default.
- W2767991844 created "2017-11-17" @default.
- W2767991844 creator A5010136826 @default.
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- W2767991844 date "2018-01-01" @default.
- W2767991844 modified "2023-10-18" @default.
- W2767991844 title "Host plant associated enhancement of immunity and survival in virus infected caterpillars" @default.
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- W2767991844 doi "https://doi.org/10.1016/j.jip.2017.11.006" @default.
- W2767991844 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29126966" @default.
- W2767991844 hasPublicationYear "2018" @default.
- W2767991844 type Work @default.