Vogel-Mikus Katarina, Drobne Damjana, Regvar Marjana
Department of Biology, Biotechnical Faculty, University of Ljubljana, Vecna pot 111, SI-1000 Ljubljana, Slovenia.
Environ Pollut. 2005 Jan;133(2):233-42. doi: 10.1016/j.envpol.2004.06.021.
Significant hyperaccumulation of Zn, Cd and Pb in field samples of Thlaspi praecox Wulf. collected from a heavy metal polluted area in Slovenia was found, with maximal shoot concentrations of 14,590 mg kg(-1) Zn, 5960 mg kg(-1) Cd and 3500 mg kg(-1) Pb. Shoot/root ratios of 9.6 for Zn and 5.6 for Cd show that the metals were preferentially transported to the shoots. Shoot bioaccumulation factors exceeded total soil Cd levels 75-fold and total soil Zn levels 20-fold, further supporting the hyperaccumulation of Cd and Zn. Eighty percent of Pb was retained in roots, thus indicating exclusion as a tolerance strategy for Pb. Low level colonisation with arbuscular mycorrhizal fungi (AMF) of a Paris type was observed at the polluted site, whereas at the non-polluted site Arum type colonisation was more common. To our knowledge this is the first report of Cd hyperaccumulation and AMF colonisation in metal hyperaccumulating T. praecox.
在从斯洛文尼亚一个重金属污染地区采集的早花遏蓝菜田间样本中，发现锌、镉和铅有显著的超积累现象，地上部分锌的最大浓度为14,590毫克/千克、镉为5960毫克/千克、铅为3500毫克/千克。锌的地上部分/根部比值为9.6，镉为5.6，这表明这些金属优先转运到地上部分。地上部分生物积累系数超过土壤总镉含量75倍、土壤总锌含量20倍，进一步证明了镉和锌的超积累。80%的铅保留在根部，因此表明排斥是对铅的一种耐受策略。在污染场地观察到低水平的巴黎型丛枝菌根真菌（AMF）定殖，而在未污染场地，天南星型定殖更为常见。据我们所知，这是关于金属超积累植物早花遏蓝菜中镉超积累和AMF定殖的首次报道。
