College of Water Conservancy and Ecological Engineering, Nanchang Institute of Technology, Nanchang, 330099, China.
Office of Poyang Lake Water Control Project Construction of Jiangxi Province, Nanchang, 330046, China.
Chemosphere. 2018 May;199:361-371. doi: 10.1016/j.chemosphere.2018.02.045. Epub 2018 Feb 8.
In this research, Ganzhou Chinese Cabbage (Brassica rapa pekinensis), Native Purple Garlic (Allium sativum L) and Leping Radish (Raphanus sativus L) widely planted and distributed along the Le'an River were chosen in the present study. Soil physical-chemical properties, nutrients contents as well as heavy metals elements accumulated in both soils and vegetables collected from 24 sites were analyzed by lab analysis combined with statistical method which was also used for calculation of contamination factor, pollution indexes and hazardous index. Heavy metals accumulation in soils were revealed with higher level, and copper and cadmium exceeded the background values by 8.82 and 16.73 times on average, which were also significantly related with the distribution of nonferrous metal processing enterprises. Heavy metal elements accumulated in vegetables were fully consistent with the finding of pollution characteristics in soils. Peroxidase biomarkers in vegetables, including superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), reduced glutathione (GSH) and lipoperoxidation (as TBARS), as well as integrated biomarker responses (IBR) were determined to give a reliable response after exposing of contaminants. Heavy metals accumulation ability and biomarker responses for three vegetables were usually determined in the following decrease trend: Ganzhou Chinese Cabbage > Native Purple Garlic > Leping Radish. Compared with peroxidase biomarkers activities or contents of control site, all the measured biomarkers in polluted sites showed significantly responses, indicating potential relationship between pollutants stresses and biomarker responses. This study also revealed that the IBR values were coordinated well with the pollutants concentrations.
本研究选择沿乐安河流域广泛种植和分布的赣州白菜（ Brassica rapa pekinensis ）、本土紫皮大蒜（ Allium sativum L ）和乐平萝卜（ Raphanus sativus L ）。通过实验室分析结合统计方法，对 24 个采样点的土壤理化性质、养分含量以及土壤和蔬菜中重金属元素的积累情况进行了分析。结果表明，土壤中重金属的积累水平较高，铜和镉的平均含量分别比背景值高出 8.82 倍和 16.73 倍，这与有色金属加工企业的分布也有显著关系。蔬菜中重金属元素的积累与土壤污染特征的发现完全一致。暴露于污染物后，蔬菜中的过氧化物酶生物标志物，包括超氧化物歧化酶（SOD）、过氧化氢酶（CAT）、过氧化物酶（POD）、还原型谷胱甘肽（GSH）和脂质过氧化（TBARS）以及综合生物标志物响应（IBR），都表现出了可靠的响应。三种蔬菜的重金属积累能力和生物标志物响应通常呈以下递减趋势：赣州白菜＞本土紫皮大蒜＞乐平萝卜。与对照点的过氧化物酶生物标志物活性或含量相比，污染点所有测量的生物标志物均表现出显著响应，表明污染物胁迫与生物标志物响应之间存在潜在关系。本研究还表明，IBR 值与污染物浓度协调良好。
