Department of Evolutionary Biology, University of Florence, Firenze, Italy.
J Hazard Mater. 2012 Aug 15;227-228:362-9. doi: 10.1016/j.jhazmat.2012.05.075. Epub 2012 May 28.
This work investigates the element distribution in Silene paradoxa growing on the mine dump of Fenice Capanne (Tuscany, Italy). The accumulation of As, Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn in root apoplast and symplast and in shoot was assessed and compared to the levels of the same metals in the respective rizosphere soils, analyzing both the total and the phytoavailable fractions. Levels of As, Cu, Fe, Pb and Zn, were above toxicity thresholds in both soil and shoot samples. Inter- and intra-element correlations were analyzed in plant and soil using different statistical methods. Soil total and phytoavailable metal concentration were shown not to be dominant in determining metal accumulation by the plant, since no significant positive correlation was found between metal concentration in soils and plants. Moreover, results indicated that S. paradoxa was able to cope with the studied multi-metal contaminated soil excluding the elements from its tissues and preferentially accumulating them into the root compartment, thus suggesting this species as possible good candidate for phytostabilization purposes.
这项工作研究了生长在意大利托斯卡纳菲尼克斯卡潘尼（Fenice Capanne）矿渣堆上的矢车菊属植物（Silene paradoxa）中的元素分布情况。评估了根质外体和共质体以及地上部分中 As、Cd、Co、Cr、Cu、Fe、Mn、Ni、Pb 和 Zn 的积累情况，并与相应根际土壤中相同金属的水平进行了比较，同时分析了总量和植物可利用部分。土壤和地上部分样本中的 As、Cu、Fe、Pb 和 Zn 含量均高于毒性阈值。使用不同的统计方法分析了植物和土壤中的元素间和元素内相关性。土壤中总金属和植物可利用金属浓度似乎并没有主导植物对金属的积累，因为没有发现土壤和植物中金属浓度之间存在显著的正相关关系。此外，结果表明，矢车菊属植物能够应对研究中的多金属污染土壤，将元素从其组织中排除并优先将其积累到根部，因此表明该物种可能是植物稳定化的良好候选者。
