Poznan University of Life Sciences, Department of Chemistry, Wojska Polskiego 75, 60-625, Poznań, Poland.
Poznan University of Life Sciences, Department of Chemistry, Wojska Polskiego 75, 60-625, Poznań, Poland.
Chemosphere. 2018 Dec;212:67-78. doi: 10.1016/j.chemosphere.2018.08.055. Epub 2018 Aug 15.
The aim of the study was to compare specimens of Salix viminalis L. able to grow in polluted mining sludge (A1) with specimens of the same willow clone growing in two unpolluted areas (A2 and A3). Plants from the polluted area were characterized by the highest accumulation of the majority of elements in their organs with a clear limitation of their uptake to roots and effective translocation to aboveground organs. Willows from the unpolluted areas were characterized by significantly higher biomass than the treated plants, as shown in the content of cellulose/holocellulose. The different chemical characteristics of the substrates influenced tree physiology, including the organic acids and phenolic compounds profile and/or content. The total content of organic acids in lateral roots was higher for S. viminalis L. grown in unpolluted areas, while for leaves the opposite situation was observed. However, their creation was significantly correlated with the content of the majority of elements in the organs of S. viminalis L. Enhanced synthesis of phenolic compounds in roots (besides quercetin) and in leaves (besides myricetin and quercetin) was confirmed in the polluted area, and correlated with metal content in plant organs. Resilient plants characterized not only by their survivability but also by their effective phytoextraction of toxic metals, have great potential for widespread practical application on highly polluted mining sludge and for reducing the associated threat to human health. The obtained results suggest that further investigation of these plants is necessary to determine the mechanism(s) responsible for their high survivability.
本研究的目的是比较能够在污染的采矿污泥中生长的欧洲山杨（A1）与在两个未受污染的地区（A2 和 A3）生长的同一柳树无性系的标本。受污染地区的植物表现出大多数元素在其器官中积累最高的特征，并且对根部的吸收和对地上器官的有效转运受到明显限制。未受污染地区的柳树的生物量明显高于处理植物，如纤维素/全纤维素含量所示。基质的不同化学特性影响树木的生理机能，包括有机酸和酚类化合物的组成和/或含量。在未受污染地区生长的欧洲山杨侧根中的有机酸总含量较高，而叶片则相反。然而，它们的形成与欧洲山杨各器官中大多数元素的含量显著相关。在污染地区，根系（除槲皮素外）和叶片（除杨梅素和槲皮素外）中酚类化合物的合成明显增强，这与植物器官中的金属含量有关。具有较强生存能力和有效提取有毒金属能力的弹性植物具有广泛应用于高度污染的采矿污泥和降低相关健康威胁的巨大潜力。研究结果表明，有必要对这些植物进行进一步研究，以确定其高生存能力的机制。
