Escarré J, Lefèbvre C, Gruber W, Leblanc M, Lepart J, Rivière Y, Delay B
1 Centre d'Ecologie Fonctionnelle et Evolutive (CNRS), 1919 Route de Mende, F-34293 Montpellier Cedex 05, France.
New Phytol. 2000 Mar;145(3):429-437. doi: 10.1046/j.1469-8137.2000.00599.x.
Growth, tolerance and zinc and cadmium hyperaccumulation of Thlaspi caerulescens populations from three metal contaminated soils and three normal soils were compared under controlled conditions. Individuals of six populations were cultivated on five soils with increasing concentrations of zinc (50-25000 μg g ) and cadmium (1-170 μg g ). There was no mortality of normal soil populations in the four metal-contaminated soils, but plant growth was reduced to half that of populations from metal-contaminated soils. However, in noncontaminated soil, the growth of individuals from normal soils was greater than that of individuals from metal-contaminated soils. Individuals from normal soils concentrated three times more zinc in the aboveground biomass than those from metal-contaminated soils, but the latter accumulated twice as much cadmium. We conclude that populations of T. caerulescens from both normal and metal-contaminated soils are interesting material for phytoextraction of zinc and cadmium, but to optimize the process of phytoextraction it is necessary to combine the extraction potentials of both type of populations.
在可控条件下，比较了三种金属污染土壤和三种正常土壤中菥蓂种群的生长、耐受性以及锌和镉的超积累情况。六个种群的个体在五种锌（50 - 25000 μg/g）和镉（1 - 170 μg/g）浓度递增的土壤上进行培养。在四种金属污染土壤中，正常土壤种群没有死亡情况，但植物生长量减少到来自金属污染土壤种群的一半。然而，在未受污染土壤中，正常土壤个体的生长量大于来自金属污染土壤的个体。正常土壤个体地上生物量中锌的富集量是金属污染土壤个体的三倍，但后者镉的积累量是前者的两倍。我们得出结论，来自正常土壤和金属污染土壤的菥蓂种群都是用于锌和镉植物提取的有趣材料，但为了优化植物提取过程，有必要结合这两种种群的提取潜力。
