Abstract

Punicalagin showed significant nematotoxic activity against pine wood nematode (PWN), Bursaphelenchus xylophilus, in the authors’ previous research. The authors performed high-throughput transcriptomic sequencing of punicalagin-treated nematodes to generate clues for its nematotoxic mechanism of action. The authors identified 2,575 differentially expressed genes, 1,428 of which were up-regulated and 1,147 down-regulated. Based on a comprehensive functional in silico analysis, the authors speculate that PWN may respond to the stimulus of punicalagin through phagosome, endocytosis, peroxisome and MAPK signaling pathways. In addition, punicalagin could greatly affect PWN energy metabolism including oxidative phosphorylation. The genes encoding twitchin and a nematode cuticular collagen could be crucial regulation targets of punicalagin, which might contribute to its nematotoxic activity against PWN.

Highlights

  • Pine wood nematode (PWN), Bursaphelenchus xylophilus, is a plant-feeding nematode parasitizing dozens of pine species and is the cause of pine wilt disease

  • We identified gene regulation patterns correlated with a response to the nematoxin punicalagin

  • Other enriched pathways included those of cell stress response, endocytosis, peroxisome and MAPK signaling pathways (Fig. A2), which we hypothesize may likewise contribute to the nematodes’ stress response to punicalagin

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Summary

Introduction

Pine wood nematode (PWN), Bursaphelenchus xylophilus, is a plant-feeding nematode parasitizing dozens of pine species and is the cause of pine wilt disease. Transcriptomic analysis, Punicalagin, Nematotoxic mechanism, Pine wood nematode, Differentially expressed genes. Transcriptome analysis of punicalagin-treated Bursaphelenchus xylophilus: Guo et al.

Results
Conclusion

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