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De Novo Transcription Responses Describe Host-Related Differentiation of Paracoccus marginatus (Hemiptera:

Lizhen Zheng1, Jianyu Li1, Mengzhu Shi2

  • 1Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China.

Insects
|September 22, 2022
PubMed

Insights

Paracoccus marginatus, an invasive pest, thrives better on papaya than potato. Gene expression analysis reveals downregulated digestive and reproductive genes when feeding on potato, suggesting adaptation mechanisms.

Area of Science:

  • Entomology
  • Molecular Biology
  • Plant-Insect Interactions

Background:

  • Paracoccus marginatus is an invasive pest with high fecundity and a broad host range.
  • This pest exhibits differential survival and reproduction rates across various host plants, notably performing better on Carica papaya than Solanum tuberosum.
  • The molecular mechanisms driving P. marginatus adaptation to different hosts remain largely unexplored.

Purpose of the Study:

  • To investigate the transcriptional differences in Paracoccus marginatus feeding on Carica papaya versus Solanum tuberosum.
  • To identify key genes and pathways involved in host plant adaptation in P. marginatus.

Main Methods:

  • RNA sequencing (RNA-seq) was employed to analyze gene expression profiles of P. marginatus from both host plants.
  • Differential gene expression analysis was conducted to identify significant transcriptional changes.
  • Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis was performed.

Main Results:

  • A total of 408 differentially expressed genes were identified between the two host plant treatments.
  • The majority of these genes were downregulated in P. marginatus feeding on S. tuberosum, including genes related to digestion, detoxification, ribosomes, and reproduction.
  • KEGG analysis revealed enrichment in lysosome and longevity regulating pathways, associated with digestion, detoxification, and longevity.

Conclusions:

  • Carica papaya appears to be a more suitable host for P. marginatus compared to Solanum tuberosum.
  • Downregulation of specific genes involved in digestion, detoxification, and reproduction may play a crucial role in P. marginatus adaptation to host plant shifts.
Keywords:
host-related differentiationinvasive peststranscription

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