Contact: Barbara Wankerl
Technische Universitaet Muenchen
Caption: For their experiments, TUM researchers used twigs around 30 centimeters long from 36 different trees and shrubs, which they exposed to different temperature and light conditions in climate chambers. Each climate chamber experiment lasted six weeks. The twigs came from the "Weltwald" or "World Forest" near Freising, Germany, in which Bavarian state foresters have planted stands of trees from different climate regions.
Credit: Photo by Julia Laube Copyright TU Muenchen
Usage Restrictions: This photo may be freely used, with copyright noted, in news coverage of the TU Muenchen.
Related news release: Warm winters let trees sleep longer