Translator Disclaimer
1 December 2009 Near-ambient Ozone Concentrations Reduce the Vigor of Betula and Populus Species in Finland
Author Affiliations +
Abstract

In this review the main growth responses of Finnish birch (Betula pendula, B. pubescens) and aspen species (Populus tremula and P. tremuloides × P. tremula) are correlated with ozone exposure, indicated as the AOT40 value. Data are derived from 23 different laboratory, open-top chamber, and free-air fumigation experiments. Our results indicate that these tree species are sensitive to increasing ozone concentrations, though high intraspecific variation exists. The roots are the most vulnerable targets in both genera. These growth reductions, determined from trees grown under optimal nutrient and water supply, were generally accompanied by increased visible foliar injuries, carbon allocation toward defensive compounds, reduced carbohydrate contents of leaves, impaired photosynthesis processes, disturbances in stomatal function, and earlier autumn senescence. Because both genera have shown complex ozone defense and response mechanisms, which are modified by variable environmental conditions, a mechanistically based approach is necessary for accurate ozone risk assessment.

Elina Oksanen, Sirkku Manninen, Elina Vapaavuori, and Toini Holopainen "Near-ambient Ozone Concentrations Reduce the Vigor of Betula and Populus Species in Finland," AMBIO: A Journal of the Human Environment 38(8), 413-417, (1 December 2009). https://doi.org/10.1579/0044-7447-38.8.413
Published: 1 December 2009
JOURNAL ARTICLE
5 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top