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Exposure to moderate concentrations of tropospheric ozone impairs tree stomatal response to carbon dioxide

Onandia, G.; Olsson, A. K.; Barth, Sabine; King, J. S. and Uddling, Johan (2011) In Environmental Pollution 159(10). p.2350-2354
Abstract
With rising concentrations of both atmospheric carbon dioxide (CO2) and tropospheric ozone (O-3), it is important to better understand the interacting effects of these two trace gases on plant physiology affecting land-atmosphere gas exchange. We investigated the effect of growth under elevated CO2 and O-3, singly and in combination, on the primary short-term stomatal response to CO2 concentration in paper birch at the Aspen FACE experiment. Leaves from trees grown in elevated CO2 and/or O-3 exhibited weaker short-term responses of stomatal conductance to both an increase and a decrease in CO2 concentration from current ambient level. The impairement of the stomatal CO2 response by O-3 most likely developed progressively over the growing... (More)
With rising concentrations of both atmospheric carbon dioxide (CO2) and tropospheric ozone (O-3), it is important to better understand the interacting effects of these two trace gases on plant physiology affecting land-atmosphere gas exchange. We investigated the effect of growth under elevated CO2 and O-3, singly and in combination, on the primary short-term stomatal response to CO2 concentration in paper birch at the Aspen FACE experiment. Leaves from trees grown in elevated CO2 and/or O-3 exhibited weaker short-term responses of stomatal conductance to both an increase and a decrease in CO2 concentration from current ambient level. The impairement of the stomatal CO2 response by O-3 most likely developed progressively over the growing season as assessed by sap flux measurements. Our results suggest that expectations of plant water-savings and reduced stomatal air pollution uptake under rising atmospheric CO2 may not hold for northern hardwood forests. under concurrently rising tropospheric O-3. (C) 2011 Elsevier Ltd. All rights reserved. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Betula papyrifera, Carbon dioxide, Ozone, Sap flow, Stomata, Stomatal conductance
in
Environmental Pollution
volume
159
issue
10
pages
2350 - 2354
publisher
Elsevier
external identifiers
  • scopus:80052337001
ISSN
0269-7491
DOI
10.1016/j.envpol.2011.06.001
project
MERGE
language
English
LU publication?
no
id
1b8afa73-cd0e-4e90-9a74-33428807e080 (old id 4448538)
date added to LUP
2013-11-15 14:37:30
date last changed
2017-05-14 04:02:04
@article{1b8afa73-cd0e-4e90-9a74-33428807e080,
  abstract     = {With rising concentrations of both atmospheric carbon dioxide (CO2) and tropospheric ozone (O-3), it is important to better understand the interacting effects of these two trace gases on plant physiology affecting land-atmosphere gas exchange. We investigated the effect of growth under elevated CO2 and O-3, singly and in combination, on the primary short-term stomatal response to CO2 concentration in paper birch at the Aspen FACE experiment. Leaves from trees grown in elevated CO2 and/or O-3 exhibited weaker short-term responses of stomatal conductance to both an increase and a decrease in CO2 concentration from current ambient level. The impairement of the stomatal CO2 response by O-3 most likely developed progressively over the growing season as assessed by sap flux measurements. Our results suggest that expectations of plant water-savings and reduced stomatal air pollution uptake under rising atmospheric CO2 may not hold for northern hardwood forests. under concurrently rising tropospheric O-3. (C) 2011 Elsevier Ltd. All rights reserved.},
  author       = {Onandia, G. and Olsson, A. K. and Barth, Sabine and King, J. S. and Uddling, Johan},
  issn         = {0269-7491},
  keyword      = {Betula papyrifera,Carbon dioxide,Ozone,Sap flow,Stomata,Stomatal conductance},
  language     = {eng},
  number       = {10},
  pages        = {2350--2354},
  publisher    = {Elsevier},
  series       = {Environmental Pollution},
  title        = {Exposure to moderate concentrations of tropospheric ozone impairs tree stomatal response to carbon dioxide},
  url          = {http://dx.doi.org/10.1016/j.envpol.2011.06.001},
  volume       = {159},
  year         = {2011},
}