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Lookup NU author(s): Professor Howard Neufeld, Emeritus Professor Alan Davison
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The goals of this study were to document the development of ozone-induced foliar injury, on a leaf-by-leaf basis, and to develop ozone exposure relationships for leaf cohorts and individual tall milkweeds (Asclepias exaltata L.) in Great Smoky Mountains National Park. Plants were classified as either ozone-sensitive or insensitive based on the amount of foliar injury. Sensitive plants developed injury earlier in the season and to a greater extent than insensitive plants. Older leaf cohorts were more likely to belong to high injury classes by the end of each of the two growing seasons. In addition, leaf loss was more likely for older cohorts (2000) and lower leaf positions (2001) than younger cohorts and upper leaves, respectively. Most leaves abscised without prior ozone-like stippling or chlorosis. Failure to take this into account can result in underestimation of the effects of ozone on these plants. © 2005 Elsevier Ltd. All rights reserved.
Author(s): Souza L, Neufeld HS, Chappelka AH, Burkey KO, Davison AW
Publication type: Article
Publication status: Published
Journal: Environmental Pollution
Year: 2006
Volume: 141
Issue: 1
Pages: 175-183
ISSN (print): 0269-7491
ISSN (electronic): 1873-6424
Publisher: Pergamon
URL: http://dx.doi.org/10.1016/j.envpol.2005.07.022
DOI: 10.1016/j.envpol.2005.07.022
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