Laboratory of Environmental Toxicology, School of Biological Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, People's Republic of China.
Ecotoxicol Environ Saf. 2008 Nov;71(3):609-15. doi: 10.1016/j.ecoenv.2008.05.007. Epub 2008 Jul 9.
Uptake, assimilation, and toxicity of exogenous iron cyanide complexes in plants were investigated. Pre-rooted young weeping willows (Salix babylonica L.) were exposed to hydroponic solutions spiked with potassium ferrocyanide at 24.0 ± 1°C for 192 h. Transpiration rates, chlorophyll contents, soluble protein, and activities of superoxide dismutases (SOD), catalase (CAT), and peroxidase (POD) of the plants were monitored to determine toxicity to the cuttings. Of all selected parameters, POD activity in leaves was the most sensitive bioindicator to the increase of ferrocyanide concentrations. Between 11% and 19% of applied ferrocyanide in the solutions was removed by willows at the end of the incubation period. Only small amounts of ferrocyanide were recovered in different parts of the plant materials. Mass balance analysis showed that more than 90% of the ferrocyanide taken up from the hydroponic solutions was assimilated by plants. The assimilation of ferrocyanide by plants showed a dose-dependent manner. These findings suggest that phytoremediation of ferrocyanide-contaminating wastewater and soils can be possible for the environmental cleaning up.
研究了外源铁氰化物配合物在植物中的吸收、同化和毒性。将预先生根的年轻垂柳（Salix babylonica L.）暴露于添加了亚铁氰化钾的水培溶液中，在 24.0±1°C 下培养 192 小时。监测植物的蒸腾速率、叶绿素含量、可溶性蛋白质以及超氧化物歧化酶（SOD）、过氧化氢酶（CAT）和过氧化物酶（POD）的活性，以确定对插条的毒性。在所选择的所有参数中，叶片中的 POD 活性是对亚铁氰化物浓度增加最敏感的生物指示剂。在孵育期结束时，柳树去除了溶液中 11%至 19%的应用亚铁氰化物。在植物材料的不同部位仅回收了少量的亚铁氰化物。质量平衡分析表明，植物从水培溶液中吸收的亚铁氰化物超过 90%被同化。植物对亚铁氰化物的同化表现出剂量依赖性。这些发现表明，对于环境清理，可以通过植物修复受亚铁氰化物污染的废水和土壤。
