Palmroth S, Berninger F, Nikinmaa E, Lloyd J, Pulkkinen P, Hari P
Department of Forest Ecology, P.O. Box 24, FIN-00014 University of Helsinki, Finland e-mail:
Max Planck Institut für Biogeochemie, Postfach 10 01 64, D-07701 Jena, Germany, , , , , , DE.
Oecologia. 1999 Nov;121(3):302-309. doi: 10.1007/s004420050932.
We investigated the functional and structural responses of Scots pine to climate and estimated the importance of the genotype on the traits studied. We analysed C isotope discrimination (ΔC) of various provenances in a common garden experiment and gas exchange characteristics for provenances growing in their natural environment. No clear climatic trend was found in the foliar ΔC values of common garden trees. Similar results were obtained from estimation of λ (a largely VPD, temperature and light independent measure of intrinsic water use efficiency) from the gas exchange data. The ratio of needle mass to unit stem area and branch area to stem area increased towards south in both experiments and hence, seemed to be genetic. Trees from drier and warmer conditions seemed not to have either lower needle mass or higher intrinsic water use efficiency compared to northern latitudes.
我们研究了欧洲赤松对气候的功能和结构响应，并估计了基因型对所研究性状的重要性。我们在一个共同园试验中分析了不同种源的碳同位素判别率（ΔC），并对生长在其自然环境中的种源的气体交换特征进行了分析。在共同园树木的叶片ΔC值中未发现明显的气候趋势。从气体交换数据估算λ（一种很大程度上与水汽压亏缺、温度和光照无关的内在水分利用效率指标）也得到了类似结果。在两个试验中，针叶质量与单位茎面积的比值以及枝面积与茎面积的比值均向南增加，因此似乎是由遗传决定的。与高纬度地区相比，来自更干燥、更温暖环境的树木似乎既没有更低的针叶质量，也没有更高的内在水分利用效率。
