Húdoková H, Fleischer P, Ježík M, Marešová J, Pšidová E, Mukarram M, Ditmarová Ľ, Sliacka-KonôPková A, Jamnická G
Institute of Forest Ecology, Slovak Academy of Sciences, Ľ. Štúra 2, 96001 Zvolen, Slovakia.
Technical University in Zvolen, Faculty of Ecology and Environmental Sciences, T.G. Masaryka 24, 96001 Zvolen, Slovakia.
Photosynthetica. 2023 Jul 11;61(3):328-341. doi: 10.32615/ps.2023.026. eCollection 2023.
A manipulative experiment with two different water regimes was established to identify the variability of physiological responses to environmental changes in 5-year-old Norway spruce provenances in the Western Carpathians. While variations in the growth responses were detected only between treatments, photosynthetic and biochemical parameters were also differently influenced among provenances. Following drought treatment, an obvious shrinkage of tree stems was observed. In most provenances, drought had a negative effect on leaf gas-exchange parameters and kinetics of chlorophyll fluorescence. Secondary metabolism was not affected so much with notable differences in concentration of sabinene, o-cimene, and (-)-alpha-terpineol monoterpenes. The most suitable indicators of drought stress were abscisic acid and fluorescence parameters. Seedlings from the highest altitude (1,500 m a.s.l.) responded better to stress conditions than the other populations. Such provenance trials may be a valuable tool in assessing the adaptive potential of spruce populations under changing climate.
开展了一项控制性实验，设置了两种不同的水分条件，以确定西喀尔巴阡山脉5年生挪威云杉种源对环境变化的生理反应变异性。虽然仅在处理之间检测到生长反应的差异，但光合和生化参数在种源间也受到不同影响。干旱处理后，观察到树干明显收缩。在大多数种源中，干旱对叶片气体交换参数和叶绿素荧光动力学有负面影响。次生代谢受影响较小，桧烯、邻伞花烃和(-)-α-松油醇等单萜类化合物的浓度存在显著差异。脱落酸和荧光参数是干旱胁迫最合适的指标。来自最高海拔（海拔1500米）的幼苗比其他种群对胁迫条件的反应更好。此类种源试验可能是评估气候变化下云杉种群适应潜力的宝贵工具。
