The Adaptive Evolution in the Fall Armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae) Revealed by the Diversity of Larval Gut Bacteria

Insect gut microbes have important roles in host feeding, digestion, immunity, development, and coevolution with pests. The fall armyworm, (Smith, 1797), is a major migratory agricultural pest worldwide. The effects of host plant on the pest's gut bacteria remain to be investigated to better un...

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Published in:Genes 2023-01, Vol.14 (2), p.321
Main Authors: Wang, Yan-Ping, Liu, Xu, Yi, Chun-Yan, Chen, Xing-Yu, Liu, Chang-Hua, Zhang, Cui-Cui, Chen, Qing-Dong, Chen, Song, Liu, Hong-Ling, Pu, De-Qiang
Format: Article
Language:English
Subjects:
Adaptation
Animals
Bacteria
Barley
Cluster analysis
Coevolution
Diet
Digestive system
Drug resistance
Evolution & development
Gastrointestinal tract
Host plants
Insects
Laboratories
Larva
Larvae
Moths
Pest control
Pests
rRNA 16S
Sorghum
Spodoptera - microbiology
Spodoptera frugiperda
Taxonomy
Zea mays - genetics
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Summary:Insect gut microbes have important roles in host feeding, digestion, immunity, development, and coevolution with pests. The fall armyworm, (Smith, 1797), is a major migratory agricultural pest worldwide. The effects of host plant on the pest's gut bacteria remain to be investigated to better understand their coevolution. In this study, differences in the gut bacterial communities were examined for the fifth and sixth instar larvae of fed on leaves of different host plants (corn, sorghum, highland barley, and citrus). The 16S rDNA full-length amplification and sequencing method was used to determine the abundance and diversity of gut bacteria in larval intestines. The highest richness and diversity of gut bacteria were in corn-fed fifth instar larvae, whereas in sixth instar larvae, the richness and diversity were higher when larvae were fed by other crops. Firmicutes and Proteobacteria were dominant phyla in gut bacterial communities of fifth and sixth instar larvae. According to the LDA Effect Size (LEfSe) analysis, the host plants had important effects on the structure of gut bacterial communities in . In the PICRUSt2 analysis, most predicted functional categories were associated with metabolism. Thus, the host plant species attacked by larvae can affect their gut bacterial communities, and such changes are likely important in the adaptive evolution of to host plants.
ISSN:2073-4425
2073-4425
DOI:10.3390/genes14020321