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Severity and Frequency of SO2-Induced Leaf Necrosis on Seedlings of 57 Tree Species

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Container-grown seedlings or rooted cuttings of 57 tree species common in the northeastern United States were tested during 1977-80 to establish the severity and frequency of SO2-induced leaf necrosis for each species. Plants were exposed to 0.9 ppm SO2 (2,400 g m-3) for 2 or 4 hr in controlled-environment chambers. Species were grouped into four sensitivity classes. For seven species considered highly sensitive, more than 40 percent of the individuals exhibited symptoms, and more than 4 percent of the leaf surface on a typical individual was necrotic on average. At the other extreme, eight species did not develop symptoms. The results are consistent with a direct relationship between a species's tolerance to SO2 and its shade tolerance. Forest Sci. 30:587-596.
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Document Type: Journal Article

Affiliations: Professor, Program in Ecology, Department of Plant Pathology, and Center for Air Environment Studies, The Pennsylvania State University, University Park, PA 16802

Publication date: 1984-09-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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