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/

Zendy Plus

Presents the zaia usage as premium feature

ZAIA

Presents the pdf analysis as premium feature

PDF Analysis

Insights

Presents the summarisation as premium feature

Summarisation

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the access of premium content as premium feature

Premium Content

Zendy Tools

Zendy Open

Saplings of six Finnish hybrid aspen ( Populus tremuloides  Michx. ×  P. tremula  L.) clones were exposed to 0, 50, 100 and 150 ppb ozone (O 3 ) for 32 days in a chamber experiment to determine differences in O 3  sensitivity among genotypes. Based on the chamber experiment, three clones with intermediate sensitivity to O 3  were selected for a free-air O 3  enrichment experiment in which plants were exposed for 2 months to either ambient air (control) or air containing 1.3 × the ambient O 3  concentration. We measured stem height and radial growth, number of leaves, dry mass and relative growth rate of leaves, stem and roots, visible leaf injuries, net photosynthesis and stomatal conductance of the clones. There was high clonal variation in susceptibility to O 3  in the chamber experiment, indicated by foliar injuries and differential reductions in growth and net photosynthesis. In the free-air O 3  enrichment experiment, ozone caused a shift in resource allocation toward stem height growth, thereby altering the shoot to root balance. In both experiments, low O 3  concentrations tended to stimulate growth of most clones, whereas 100 and 150 ppb O 3  in the chamber experiment impaired growth of most clones. However, growth of the most O 3 -tolerant clone was not significantly affected by any O 3  treatment.

tree physiology

Genotypic variation in growth and physiological responses of Finnish hybrid aspen ( Populus tremuloides  ×  P. tremula ) to elevated tropospheric ozone concentration