ダニ防御システムが植物を守る(Mighty Mite Defense Systems: More Mites, More Protection for Plants)

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2025-05-22 ミシガン大学

ミシガン大学の研究で、葉裏の「ドマティア」という小部屋に住むダニが植物を病原菌や小型害虫から守ることが判明した。ドマティアを持つ植物にはより多くのダニが生息し、葉を清潔に保ち、防御力が高まる。研究は16種の木本植物を対象に行われ、80%がドマティアを持つことが確認され、これは過去最高の割合である。ミシガンの森林はこうしたダニとの共生関係が特に盛んな地域であり、楓や樫などの主要樹種でも確認された。

<関連情報>

ミシガン州の北米東部落葉樹林におけるダニDomatiaと関連ダニ密度 Mite Domatia and Associated Mite Density in a North American Eastern Deciduous Forest in Michigan

Carolyn D. K. Graham, Lillian R. Bailey, Ashley E. Cole, Anna M. Cress, Emma Dawson-Glass, Bailee D. Duke, Liam J. Estill, Lauren D. Jones, Gabrielle R. Leon, Samantha Molino …
Ecology and Evolution  Published: 23 April 2025
DOI:https://doi.org/10.1002/ece3.71379

ダニ防御システムが植物を守る(Mighty Mite Defense Systems: More Mites, More Protection for Plants)

ABSTRACT

Mite–plant defense mutualisms are among the most common defense mutualisms in the world—yet studies providing basic information on their prevalence in plant communities remain rare. Here, we systematically surveyed common woody plants in a North American deciduous forest for the presence of plant–mite mutualistic interactions. We scored 16 common woody species in a wooded natural area for the presence and number of mite domatia—small structures on the underside of plant leaves that are known to house mutualistic mites. We found that 80% of common woody species in the forest had mite domatia, the highest reported percentage of mite domatia in any survey conducted thus far. We paired our survey with a quantification of the number of mites found on each leaf and investigated the relationship between mite domatia and mite abundance within and across species. We found that plants with mite domatia had significantly more mites on their leaves than species that lacked mite domatia, and that plants with more domatia had more mites. Together, our study provides much needed systematic survey data on plant–mite mutualism prevalence in an important plant community and points to northern temperate forests as a promising system to study plant–mite mutualisms in high densities in the future.

生物工学一般
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