Department of Biological Geological and Environmental Sciences, University of Bologna, Via Irnerio 42, 40126 Bologna, Italy.
Department of Chemistry "G. Ciamician", University of Bologna, Via Selmi 2, 40126 Bologna, Italy.
Molecules. 2019 Aug 1;24(15):2813. doi: 10.3390/molecules24152813.
In recent years, heavy metals (HMs) levels in soil and vegetation have increased considerably due to traffic pollution. These pollutants can be taken up from the soil through the root system. The ability of plants to accumulate HMs into their tissues can therefore be used to monitor soil pollution. The aim of this study was to test the ruderal species L., L., and L., as possible candidates for biomonitoring Cu, Zn, Cd, Cr, Ni and Pb in multiple environments. The soils analyzed in this work came from three different environments (urban, woodland, and ultramafic), and therefore deeply differed for their metal content, texture, pH, and organic matter (OM) content. All urban soils were characterized by high OM content and presence of anthropogenic metals like Pb, Zn, Cd, and Cu. Woodland soils were sandy and characterized by low metal content and low OM content, and ultramafic soils had high Ni and Cr content. This soil variability affected the bioindication properties of the three studied species, leading to the exclusion of most metals (Zn, Cu, Cr, Cd, and Pb) and one species () due to the lack of linear relations between metal in soil and metal in plants. and , conversely, appeared to be good indicators of Ni in all the soils tested. A high linear correlation between total Ni in soil and Ni concentration in shoots ( = 0.78) was found and similar results were achieved for ( = 0.88)
近年来，由于交通污染，土壤和植被中的重金属（HMs）水平显著增加。这些污染物可以通过根系从土壤中吸收。因此，植物积累重金属到其组织中的能力可用于监测土壤污染。本研究的目的是测试藜科的三种藜属植物，即，作为在多种环境中监测 Cu、Zn、Cd、Cr、Ni 和 Pb 的可能生物标志物。本研究分析的土壤来自三个不同的环境（城市、林地和超镁铁质岩），因此其金属含量、质地、pH 值和有机质（OM）含量差异很大。所有城市土壤的特点是 OM 含量高，存在人为金属如 Pb、Zn、Cd 和 Cu。林地土壤呈沙质，金属含量低，OM 含量低，超镁铁质土壤 Ni 和 Cr 含量高。这种土壤变异性影响了三种研究物种的生物指示特性，导致大多数金属（Zn、Cu、Cr、Cd 和 Pb）和一个物种（）被排除在外，因为土壤中的金属和植物中的金属之间缺乏线性关系。和，相反，在所有测试的土壤中似乎都是 Ni 的良好指标。在土壤总 Ni 和 地上部 Ni 浓度之间发现了高度线性相关（= 0.78），对于 （= 0.88）也取得了类似的结果。
