4.7 Article

Host-plant induced changes in microbial community structure and midgut gene expression in an invasive polyphage (Anoplophora glabripennis)

Journal

SCIENTIFIC REPORTS
Volume 8, Issue -, Pages -

Publisher

NATURE PORTFOLIO
DOI: 10.1038/s41598-018-27476-0

Keywords

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Funding

  1. USDA NIFA [2015-67013-23287]
  2. USDA NIFA Hatch Project [PEN04576]
  3. Alphawood Foundation
  4. USDA-AFRI Microbial Functional Genomics Training grant [2010-65110-20488]
  5. World Class University Project grant from the Ministry of Education, Science and Technology of South Korea [R31-2009-000-20025-0]
  6. NIFA [2010-65110-20488, 581129] Funding Source: Federal RePORTER

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Polyphagous insect herbivores possess diverse mechanisms to overcome challenges of feeding in multiple plant species including, but not limited to, transcriptional plasticity and associations with obligate or facultative symbionts. The Asian long horned beetle (Anoplophora glabripennis) is a polyphagous wood-feeder capable of developing on over 100 tree species and, like other polyphages, its genome contains amplifications of digestive and detoxification genes. This insect also possesses a diverse gut microbial community, which has the metabolic potential to augment digestive physiology. While the genomic repertoires of A. glabripennis and its microbial community have been studied previously, comparatively less is known about how the gut transcriptome and community change in response to feeding in different hosts. In this study, we show that feeding in two suitable hosts (Acer spp. and Populus nigra) altered the expression levels of multicopy genes linked to digestion and detoxification. However, feeding in a host with documented resistance (Populus tomentosa) induced changes in the transcriptome and community beyond what was observed in insects reared in P. nigra, including the downregulation of numerous beta-glucosidases, odorant binding proteins, and juvenile hormone binding proteins, the upregulation of several cuticular genes, and the loss of one major bacterial family from the gut community.

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