2023 Fiscal Year Final Research Report
For control of nematodes with nematodes: development of a new pine wilt control technology using predatory nematodes
| Project/Area Number |
19K06145
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 40010:Forest science-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
神崎 菜摘 国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 等 (70435585)
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| Project Period (FY) |
2019-04-01 – 2024-03-31
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| Keywords | マツ材線虫病 / マツノザイセンチュウ / 捕食性線虫 / 生物的防除 |
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| Outline of Final Research Achievements |
Seinura caverna, a species closely related to the pine wood nematode, the causative agent of pine wilt disease, is a hermaphroditic species with a high ability to prey on nematodes. As a result of comparing and observing the ultrastructure of several closely related Aphelenchoididae species with diverse life histories, we found that S. caverna and its related predatory nematode share a highly elastic cuticle structure. It is speculated that this functions as a physical signal that distinguishes preys from others when ejecting the stylet for predation. In addition, S. caverna significantly suppressed the population of the pine wood nematodes in vitro, suggesting its potential as a biological control material.
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| Free Research Field |
Nematology
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| Academic Significance and Societal Importance of the Research Achievements |
捕食性線虫でありながら培養が容易であり単一個体から増殖できるというS. cavernaがもつ実験材料としてのアドバンテージを生かし、同種を線虫における捕食行動研究モデルとするための基礎的知見を集積し、研究基盤を整えた。また対峙培養によりマツノザイセンチュウに対する個体数抑制効果を確認し、生物防除資材としての利用可能性を示した。
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