English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Eucalypts are important forest resources in southwestern China, and may be tolerant to elevated ground-level ozone (O 3 ) concentrations that can negatively affect plant growth. High CO 2 may offset O 3 -induced effects by providing excess carbon to produce secondary metabolites or by inducing stomatal closure. Here, the effects of elevated CO 2 and O 3 on leaf secondary metabolites and other defense chemicals were studied by exposing seedlings of Eucalyptus globulus, E. grandis, and E. camaldulensis  ×  E. deglupta to a factorial combination of two levels of O 3 (< 10 nmol mol −1 and 60 nmol mol −1 ) and CO 2 (ambient: 370 μmol mol −1 and 600 μmol mol −1 ) in open-top field chambers. GC-profiles of leaf extracts illustrated the effect of elevated O 3 and the countering effect of high CO 2 on compounds in leaf epicuticular wax and essential oils, i.e., n -icosane, geranyl acetate and elixene, compounds known as a first-line defense against insect herbivores. n -Icosane may be involved in tolerance mechanisms of E. grandis and the hybrid, while geranyl acetate and elixene in the tolerance of E. globulus . Elevated O 3 and CO 2 , singly or in combination, affected only leaf physiology but not biomass of various organs. Elevated CO 2 impacted several leaf traits, including stomatal conductance, leaf mass per area, carbon, lignin, n -icosane, geranyl acetate and elixene. Limited effects of elevated O 3 on leaf physiology (nitrogen, n -icosane, geranyl acetate, elixene) were commonly offset by elevated CO 2 . We conclude that E. globulus , E. grandis and the hybrid were tolerant to these O 3 and CO 2 treatments, and n -icosane, geranyl acetate and elixene may be major players in tolerance mechanisms of the tested species.

journal of forestry research/journal of forestry research

Elevated CO2 offsets the alteration of foliar chemicals (n-icosane, geranyl acetate, and elixene) induced by elevated O3 in three taxa of O3-tolerant eucalypts