Variation in functional leaf traits among beech provenances during a Spanish summer reflects the differences in their origin

被引:0
作者
T. Matthew Robson
David Sánchez-Gómez
F. Javier Cano
Ismael Aranda
机构
[1] University of Helsinki,Plant Biology Division, Department of Biosciences
[2] Centro de Investigación Forestal,Instituto Nacional de Investigaciones Agrarias y Tecnologías Agroalimentarias
[3] Universidad Politécnica de Madrid,Unidad de Anatomía, Fisiología y Genética Forestal, Escuela Técnica Superior de Ingenieros de Montes
来源
Tree Genetics & Genomes | 2012年 / 8卷
关键词
Common-garden trial; Water-use efficiency; Carbon isotopic composition; Intraspecific variation; Plasticity; Adaptation to climate change;
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摘要
We assessed the response of 11-year-old saplings from six beech provenances growing in a common-garden trial at the southwestern range limit. Provenances from distinct climatic regions across the European beech distribution were selected. The local Spanish provenance appeared well suited to the site conditions, maintaining high rates of assimilation even in midsummer, but so did the provenance of southern continental origin, from Gotze-Delchev, Bulgaria. Those provenances from cooler sites in central Europe, a continental mountain climate in the Czech Republic and a continental range-edge site in eastern Poland, along with a German provenance of mild maritime origin, had good physiological functionality in early summer but reduced carbon assimilation (Aarea) and apparent soil–leaf hydraulic conductivity (KL) in midsummer. The northern maritime provenance from Sweden demonstrated severely-reduced photosynthetic capacity. These groupings of provenances according to their photosynthetic performance, stable carbon isotope composition (δ13C; a proxy for water-use efficiency) and leaf water potential under marginal conditions, during late summer in the trial, suggest that they have divergent strategies for water use. The research highlights large intraspecific differences among beech provenances of distinct origin and strategies which are expected to modify their response to drought, requiring future genetic studies to explicitly determine the basis of this ecophysiological differentiation.
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页码:1111 / 1121
页数:10
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