Audet Patrick, Charest Christiane
Ottawa-Carleton Institute of Biology, Department of Biology, University of Ottawa, 30 Marie-Curie St., Ottawa, Ont. K1N 6N5, Canada.
Environ Pollut. 2007 May;147(1):231-7. doi: 10.1016/j.envpol.2006.08.011. Epub 2006 Oct 11.
We conducted a literature survey and correlated heavy metal (HM) uptake and plant growth factors from published data to estimate the effectiveness of phytoextraction. The indicators of the actual plant HM uptake showed positive correlations with soil-HM concentrations, while the relative plant HM uptake showed negative correlations. Plant growth was negatively correlated with both the plant and soil-HM concentrations. These significant relationships were found for the majority of HM tested (e.g. Zn, Cd, Pb, Cu, Cr, and Fe) with a few exceptions (e.g. Ni, Co, and Mn). After fitting the correlation coefficients, the highest proportion of variance among the studies was mainly due to the experimental parameters or the plant species. When the metabolic costs of HM uptake are taken into account, the phytoextraction appears to be less effective beyond critical HM concentrations. Despite these constraints, it is emphasized that HM phytoextraction can play an important role in bioremediation.
我们进行了一项文献调查，并根据已发表数据将重金属（HM）吸收与植物生长因子相关联，以评估植物提取的有效性。实际植物HM吸收指标与土壤HM浓度呈正相关，而植物相对HM吸收呈负相关。植物生长与植物和土壤HM浓度均呈负相关。在大多数测试的重金属（例如锌、镉、铅、铜、铬和铁）中发现了这些显著关系，但有少数例外（例如镍、钴和锰）。拟合相关系数后，研究中最高比例的方差主要归因于实验参数或植物物种。当考虑到HM吸收的代谢成本时，超过临界HM浓度后植物提取似乎效果较差。尽管存在这些限制，但需要强调的是，HM植物提取在生物修复中可以发挥重要作用。
