Baker A J M, Reeves R D, Hajar A S M
Department of Animal and Plant Sciences, University of Sheffield, PO Box 601, Sheffield, SJO 2UQ, UK.
Department of Chemistry & Biochemistry, Massey University, Palmerston North, New Zealand.
New Phytol. 1994 May;127(1):61-68. doi: 10.1111/j.1469-8137.1994.tb04259.x.
Heavy metai uptake, accumulation and tolerance were investigated in five British populations of the metallophyte Thlaspi caerulescens from metalliferous sites from the north and south Pennines orefields. Analysis of field samples showed mean shoot Zn, Pb and Cd concentrations of up to 21000, 660 and 164/zMug g respectively. A solution culture experiment designed to investigate both tolerance and metal accumulation is reported. Indices of tolerance of five populations to 12 metals (Ag, Al, Cd, Co, Cr, Cu, Fe, Mn, Mo, Ni, Pb, Zn) showed few population differences but unexpectedly high tolerance to metals not present at elevated concentrations in the parent soils. This was paralleled by exceptionally high uptakes of all metals studied. Zn, Cd, Co, Mn and Ni were readily transported to the shoot whereas Al, Cr Cu, Fe and Pb were predominantly immobilized in the roots. The data suggest common mechanisms of absorption and transport of several metals in this species.
对来自奔宁山脉南北矿田含金属地点的5个英国金属植物天蓝遏蓝菜种群的重金属吸收、积累和耐受性进行了研究。对田间样本的分析表明，地上部分锌、铅和镉的平均浓度分别高达21000、660和164μg/g。本文报道了一项旨在研究耐受性和金属积累的溶液培养实验。5个种群对12种金属（银、铝、镉、钴、铬、铜、铁、锰、钼、镍、铅、锌）的耐受性指数显示种群差异不大，但对母土中未以高浓度存在的金属具有出乎意料的高耐受性。这与所研究的所有金属的异常高吸收量相平行。锌、镉、钴、锰和镍很容易转运到地上部分，而铝、铬、铜、铁和铅主要固定在根部。数据表明该物种中几种金属的吸收和运输存在共同机制。
