J Šantrůček, J Kubásek, J Janová, H ŠantrůčKOvá, J Altman, J Tumajer, M Hrádková, E Cienciala
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引用次数: 0
Abstract
The strategies of Norway spruce [Picea abies (L.) Karst.] to increasing atmospheric CO2 concentration (Ca) are not entirely clear. Here, we reconstructed centennial trajectories of leaf internal CO2 concentration (Ci) and intrinsic water-use efficiency (WUEi) from the amount of 13C in tree-ring cellulose. We collected 57 cores across elevations, soil, and atmospheric conditions in central Europe. Generally, WUEi and Ci increased over the last 100 years and the Ci/Ca ratio remained almost constant. However, two groups were distinguished. The first group showed a quasi-linear response to Ca and the sensitivity of Ci to Ca (s = dCi/dCa) ranged from 0 to 1. Trees in the second group showed nonmonotonic responses with extremes during the peak of industrial air pollution in the 1980s and s increase from -1 to +1.6. Our study shows a marked attenuation of the rise in WUEi during the 20th century leading to invariant WUEi in recent decades.
期刊介绍:
Photosynthetica publishes original scientific papers and brief communications, reviews on specialized topics, book reviews and announcements and reports covering wide range of photosynthesis research or research including photosynthetic parameters of both experimental and theoretical nature and dealing with physiology, biophysics, biochemistry, molecular biology on one side and leaf optics, stress physiology and ecology of photosynthesis on the other side.
The language of journal is English (British or American). Papers should not be published or under consideration for publication elsewhere.