Leaf phenology and insect grazing of Japanese white birch saplings grown under free-air ozone exposure

DOI Web Site Web Site 被引用文献3件 参考文献20件

この論文をさがす

抄録

Ground-level ozone (O3) increases yearly and negatively affects the growth of birches via leaf dynamics. Leaf area is directly related to plant production and is usually reduced by elevated O3 (eO3) and insect herbivores. The objective of this study was to explore factors affecting change in leaf number of white birch saplings and insects grazing under eO3. In order to accomplish this objective, we observed seasonal changes in leaf phenology and determined foliar defense chemicals in saplings grown under ambient air and free-air O3 enrichment (60 nmol mol-1 for daytime). The leaf phenology showed the total number of emerged leaves was about 10 per shoot in the control and eO3 plots. However, the number of attached leaves per shoot at ambient air decreased after mid-July, probably due to grazing by larvae of the leaf beetle. In addition, the concentration of condensed tannin in early leaves was higher in the eO3 plot than that in the control plot. Such leaves with decreased nutritional value under eO3 may prevent feeding of leaf beetles. These findings lead to the plausible understanding of an indirect effect of eO3 on leaf phenology via foliar defense of white birch against insect herbivores.

収録刊行物

  • 農業気象

    農業気象 72 (2), 80-84, 2016

    日本農業気象学会

被引用文献 (3)*注記

もっと見る

参考文献 (20)*注記

もっと見る

関連プロジェクト

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ