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Issue 9, 2011
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Acute O3 damage on first year coppice sprouts of aspen and maple sprouts in an open-air experiment

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Abstract

We studied the effect of high ozone (O3) concentration (110–490 nmol mol−1) on regenerating aspen (Populus tremuloides) and maple (Acer saccharum) trees at an open-air O3 pollution experiment near Rhinelander WI USA. This study is the first of its kind to examine the effects of acute O3 exposure on aspen and maple sprouts after the parent trees, which were grown under elevated O3 and/or CO2 for 12 years, were harvested. Acute O3 damage was not uniform within the crowns of aspen suckers; it was most severe in the mature, fully expanded photosynthesizing leaves. Young expanding leaves showed no visible signs of acute O3 damage contrary to expectations. Stomatal conductance played a primary role in the severity of acute O3 damage as it directly controlled O3 uptake. Maple sprouts, which had lower stomatal conductance, smaller stomatal aperture, higher stomatal density and larger leaf surface area, were tolerant of acute O3 exposure. Moreover, elevated CO2 did not ameliorate the adverse effects of acute O3 dose on aspen and maple sprouts, in contrast to its ability to counteract the effects of long-term chronic exposure to lower O3 levels.

Graphical abstract: Acute O3 damage on first year coppice sprouts of aspen and maple sprouts in an open-air experiment

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Publication details

The article was received on 28 Mar 2011, accepted on 22 Jun 2011 and first published on 13 Jul 2011


Article type: Paper
DOI: 10.1039/C1EM10269A
Citation: J. Environ. Monit., 2011,13, 2436-2442
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    Acute O3 damage on first year coppice sprouts of aspen and maple sprouts in an open-air experiment

    J. N. T. Darbah, W. S. Jones, A. J. Burton, J. Nagy and M. E. Kubiske, J. Environ. Monit., 2011, 13, 2436
    DOI: 10.1039/C1EM10269A

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