Kreuzwieser Jürgen, Cojocariu Cristian, Jüssen Vera, Rennenberg Heinz
Institute for Forest Botany and Tree Physiology; Albert-Ludwigs-Universität Freiburg, Georges-Köhler-Allee Geb. 053/054, D-79110 Freiburg i. Br, Germany.
New Phytol. 2002 May;154(2):327-333. doi: 10.1046/j.1469-8137.2002.00394.x.
• The effect of elevated atmospheric CO 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 in the autumn (from 14-40 nmol m min and from 2-8 nmol m min , respectively), but not in the summer. No significant effects were found for leaves of Q. pubescens. The effects of CO on Q. ilex were mainly a result of decreased emissions by control trees under ambient CO concentrations in the autumn; emissions from trees exposed to elevated CO remained at a high level. • Elevated atmospheric CO 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.
• 在田间条件下分析了大气中二氧化碳浓度升高对两种地中海栎树（冬青栎和柔毛栎）叶片羰基排放的影响。
• 生理和气象参数的测定与羰基排放的测量同时进行。使用动态气室结合红外气体分析仪对气体交换进行定量分析。
• 秋季，二氧化碳浓度升高使冬青栎叶片的乙醛和丙酮排放量增加（分别从14 - 40纳摩尔·米²·分钟和2 - 8纳摩尔·米²·分钟增加），但夏季未出现这种情况。柔毛栎叶片未发现显著影响。二氧化碳对冬青栎的影响主要是由于秋季环境二氧化碳浓度下对照树的排放量减少；暴露于高浓度二氧化碳的树木排放量保持在较高水平。
• 大气中二氧化碳浓度升高导致冬青栎叶片羰基排放在秋季发生变化。这些影响表明乙醛和丙酮的产生取决于发育因素。目前尚不清楚羰基排放的改变是否是冬青栎独有的特征。
