Kesić Lazar, Kovačević Branislav, Milović Marina, Stanković Dragica, Ilić Marko, Poljaković-Pajnik Leopold, Pekeč Saša, Orlović Saša
Institute of Lowland Forestry and Environment, University of Novi Sad, Antona Cehova 13d, 21102 Novi Sad, Serbia.
Institute for Multidisciplinary Research, University of Belgrade, Kneza Višeslava 1, 11030 Belgrade, Serbia.
Plants (Basel). 2025 Jun 3;14(11):1705. doi: 10.3390/plants14111705.
This study evaluated the physiological responses and biomass production of selected poplar and willow clones cultivated in form of phytoremediation buffer plantations on landfills in Vinča (near Belgrade) and Novi Sad, Serbia. Key parameters assessed included net photosynthesis (A), transpiration (E), stomatal conductance (g), and water use efficiency (WUE). Results indicated a significant Clone × Site interaction for net photosynthesis, suggesting environmental-specific clone responses. Transpiration and stomatal conductance exhibited site-stable expression between sites, implying conservative traits or similar hydrological conditions during measurements. Particularly, total site values for physiological parameters were higher at the Novi Sad site, likely due to continuous access of plants to groundwater. The weak correlation between WUE and biomass production suggests that favorable water conditions at both sites diminished the importance of water use efficiency for biomass accumulation. Poplar clone S1-8 exhibited the highest biomass production and leaf-level gas exchange traits (A, E, g, WUE), reflecting a fast-growth strategy through increased gas exchange. This clone's consistent productivity across sites classifies it as a generalist, while willow clone 378 and poplar clone 135/81, with significantly higher biomasses at the Novi Sad site than at the Vinča site, can be considered as specialists. Use of both generalist and specialist clones in multiclonal plantations may enhance phytoremediation and biomass production stability across variable sites. These findings underscore the importance of selecting appropriate clones for phytoremediation on landfills and on contaminated lands in general.
本研究评估了在塞尔维亚贝尔格莱德附近的温恰和诺维萨德的垃圾填埋场以植物修复缓冲种植园形式种植的选定杨树和柳树无性系的生理反应和生物量生产。评估的关键参数包括净光合作用（A）、蒸腾作用（E）、气孔导度（g）和水分利用效率（WUE）。结果表明，净光合作用存在显著的无性系×地点交互作用，表明无性系对环境有特定反应。蒸腾作用和气孔导度在不同地点之间表现出地点稳定的表达，这意味着在测量期间具有保守性状或相似的水文条件。特别是，诺维萨德地点的生理参数总地点值较高，这可能是由于植物能够持续获取地下水。水分利用效率与生物量生产之间的弱相关性表明，两个地点有利的水分条件降低了水分利用效率对生物量积累的重要性。杨树无性系S1 - 8表现出最高的生物量生产和叶片水平的气体交换特征（A、E、g、WUE），反映了通过增加气体交换实现的快速生长策略。该无性系在不同地点的一致生产力使其被归类为通才，而柳树无性系378和杨树无性系135/81在诺维萨德地点的生物量明显高于温恰地点，可被视为专才。在多无性系种植园中使用通才和专才无性系可能会提高植物修复和不同地点生物量生产的稳定性。这些发现强调了在垃圾填埋场和一般污染土地上选择合适的无性系进行植物修复的重要性。
