| 要旨トップ | 本企画の概要 | 日本生態学会第65回全国大会 (2018年3月、札幌) 講演要旨
ESJ65 Abstract


シンポジウム S14-7  (Presentation in Symposium)

BVOC emissions of Japanese white birch under high ozone concentration

*Noboru MASUI(北海道大学農学院), Tomoki Mochizuki(静岡県大食品栄養科学), Akira Tani(静岡県大食品栄養科学), Takayoshi Koike(北海道大学農学研究院)

The recent increase of ground-level ozone (O3) may affect the quality of leaves and consequently affect the degree of grazing by insects. Using a free-air O3 enrichment system, we found lower grazing damages on leaves of Japanese white birch by alder leaf beetle under elevated O3. Contrary to the result found in the field, choice and non-choice style of feeding experiments showed that leaves exposed to elevated O3 were preferred by the leaf beetles due to lower defensive chemical production. To clarify this contradictory phenomenon, we pointed out the possibility of BVOC (Biogenic Volatile Organic Compounds) working as signal chemicals for insects to locate their host plants. In this research, two groups of BVOC, monoterpene (MT, C10H16) and sesquiterpene (SQT, C15H24) were of interest. Although many compounds were emitted from leaves of the birch, both MT and SQT had no significant difference in the basal emission rate regardless of O3 exposure. Therefore, BVOC emission in itself does not work as a factor that changes grazing activity of the leaf beetles, however, the blend ratio of BVOC should be considered. Under elevated O3, BVOC dynamics should be studied considering the reaction with O3 after emitted into the atmosphere.


日本生態学会