TY - JOUR
T1 - Leaf age affects the responses of foliar injury and gas exchange to tropospheric ozone in Prunus serotina seedlings
AU - Zhang, Jianwei
AU - Schaub, Marcus
AU - Ferdinand, Jonathan A.
AU - Skelly, John M.
AU - Steiner, Kim C.
AU - Savage, James E.
N1 - Funding Information:
This project was partially supported by a grant from the U.S. EPA Science to Achieve Results (STAR) program. ID No. 825244-01-00 , National Center for Environmental Research and Quality Assurance , Washington, DC. We also thank the Pennsylvania Department of Conservation and Natural Resources, Bureau of Forestry, Penn Nursery for their site and logistical support. This paper has not been subjected to review from any government agencies and therefore it does not necessarily reflect the views of these agencies. The comments provided by two anonymous reviewers on the earlier version were greatly appreciated.
Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2010/8
Y1 - 2010/8
N2 - We investigated the effect of leaf age on the response of net photosynthesis (A), stomatal conductance (gwv), foliar injury, and leaf nitrogen concentration (NL) to tropospheric ozone (O 3) on Prunus serotina seedlings grown in open-plots (AA) and open-top chambers, supplied with either carbon-filtered or non-filtered air. We found significant variation in A, gwv, foliar injury, and NL (P < 0.05) among O3 treatments. Seedlings in AA showed the highest A and gwv due to relatively low vapor pressure deficit (VPD). Older leaves showed significantly lower A, gwv, NL, and higher foliar injury (P < 0.001) than younger leaves. Leaf age affected the response of A, gwv, and foliar injury to O3. Both VPD and N L had a strong influence on leaf gas exchange. Foliar O 3-induced injury appeared when cumulative O3 uptake reached 8-12 mmol m-2, depending on soil water availability. The mechanistic assessment of O3-induced injury is a valuable approach for a biologically relevant O3 risk assessment for forest trees.
AB - We investigated the effect of leaf age on the response of net photosynthesis (A), stomatal conductance (gwv), foliar injury, and leaf nitrogen concentration (NL) to tropospheric ozone (O 3) on Prunus serotina seedlings grown in open-plots (AA) and open-top chambers, supplied with either carbon-filtered or non-filtered air. We found significant variation in A, gwv, foliar injury, and NL (P < 0.05) among O3 treatments. Seedlings in AA showed the highest A and gwv due to relatively low vapor pressure deficit (VPD). Older leaves showed significantly lower A, gwv, NL, and higher foliar injury (P < 0.001) than younger leaves. Leaf age affected the response of A, gwv, and foliar injury to O3. Both VPD and N L had a strong influence on leaf gas exchange. Foliar O 3-induced injury appeared when cumulative O3 uptake reached 8-12 mmol m-2, depending on soil water availability. The mechanistic assessment of O3-induced injury is a valuable approach for a biologically relevant O3 risk assessment for forest trees.
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U2 - 10.1016/j.envpol.2010.05.003
DO - 10.1016/j.envpol.2010.05.003
M3 - Article
C2 - 20537450
AN - SCOPUS:77958191597
SN - 0269-7491
VL - 158
SP - 2627
EP - 2634
JO - Environmental Pollution
JF - Environmental Pollution
IS - 8
ER -