A Delayed-Effect Of Ozone Fumigation On Photosynthesis Of Norway Spruce

Editions Scientifiques Elsevier
Publication Type:
Journal Article
Annales Des Sciences Forestieres, 1989, 46 pp. 568 - 572
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Much of the research investigating the effects of gaseous pollutants upon plants has been concerned with dose-response relationships, particularly during the period of fumigation or in between the periods of fumigation, in the summer. However, there is increasing evidence that these pollutants increase plant susceptibility to winter injury (Barnes and Davison, 1988; Brown ef al., 1987). This is especially problematic for conifers, since they maintain needles and some metabolic activity throughout the winter. Indeed, there is increasing evidence that the forest decline documented for northeastern U.S.A. and Europe results from the interaction of various abiotic and biotic factors including air pollutants, frost and winter dessication (Brown et aL, 1987; Barnes and Davison, 1988).
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