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Elevated atmospheric CO 2 causes seasonal changes in carbonyl emissions from Quercus ilex
Author(s) -
Kreuzwieser Jürgen,
Cojocariu Cristian,
Jüssen Vera,
Rennenberg Heinz
Publication year - 2002
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1046/j.1469-8137.2002.00394.x
Subject(s) - acetaldehyde , chemistry , ozone , acetone , environmental chemistry , atmosphere (unit) , botany , meteorology , biology , organic chemistry , physics , ethanol
Summary• The effect of elevated atmospheric CO 2 on the carbonyl emissions of leaves from two Mediterranean oak species ( Quercus ilex and Q. pubescens ) was analyzed under field conditions.• Physiological and meteorological parameters were determined in parallel with measurements of carbonyl emissions. Gas exchange was quantified in dynamic cuvettes combined with an infrared gas analyzer.• Acetaldehyde and acetone emissions from leaves of Q. ilex were enhanced by elevated CO 2 in the autumn (from 14–40 nmol m −2 min −1 and from 2–8 nmol m −2 min −1 , respectively), but not in the summer. No significant effects were found for leaves of Q. pubescens . The effects of CO 2 on Q. ilex were mainly a result of decreased emissions by control trees under ambient CO 2 concentrations in the autumn; emissions from trees exposed to elevated CO 2 remained at a high level.• Elevated atmospheric CO 2 causes autumnal changes in carbonyl emissions from Quercus ilex. These effects suggest that the production of acetaldehyde and acetone depend on developmental factors. It is not yet clear whether the altered carbonyl emissions are a unique feature of Q. ilex .