Pteris vittata coupled with phosphate rock effectively reduced As and Cd uptake by water spinach from contaminated soil
Pteris vittata coupled with phosphate rock effectively reduced As and Cd uptake by water spinach from contaminated soil
复制标题
凤尾蕨与磷矿结合有效减少了空心菜对受污染土壤中砷和镉的吸收
DOI：
10.1016/j.chemosphere.2020.125916
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发表时间：
2020
期刊：
影响因子：
8.8
通讯作者：
Ma Lena Q.
中科院分区：
文献类型：
--
作者：
Hua Chen-Yu;Chen Jun-Xiu;Cao Yue;Li Hong-Bo;Chen Yanshan;Ma Lena Q.
砷（As）和镉（Cd）在环境中普遍存在，它们对人类都有毒性。当存在于土壤中时，它们可以进入食物链，从而威胁人类健康。空心菜（Ipomoeaaquatica）是一种重要的叶菜类蔬菜，在亚洲各国广泛食用。但它能有效地吸收土壤中的As和Cd，并将其积累在可食部分中。因此，降低土壤中As、Cd的含量，特别是污染土壤中As、Cd的含量具有重要意义。采用盆栽试验研究了砷超积累植物蕨菜（Pteris vittata）对不同磷处理下空心菜吸收砷和镉的影响，在污染土壤中分别添加磷肥（+P）和磷矿粉（+PR），培养60 d后，再培养30 d。分析了植物生物量、植物和土壤中As和Cd含量以及土壤pH值。我们发现，与PR偶联的沙菜使空心菜地上部的砷浓度降低了42%，这可能是沙菜吸收砷的结果。此外，菠菜对Cd的吸收量降低了24 - 44%，这可能是由于菠菜培养后pH值升高了0.47 - 0.61。综上所述，白屈菜与PR联用降低了空心菜中As和Cd的含量，对提高食品安全性和保护人体健康具有重要意义。
Arsenic (As) and cadmium (Cd) are ubiquitous in the environment and they are both toxic to humans. When present in soils, they can enter food chain, thereby threatening human health. Water spinach (Ipomoea aquatica) is an important leafy vegetable, which is widely consumed in Asian countries. However, it is efficient in taking up As and Cd from soils and accumulating them in the edible parts. Therefore, it is of significance to reduce its As and Cd content, especially in contaminated soil. In this study, pot experiments were conducted to investigate the ability of As-hyperaccumulatorPteris vittatain reducing As and Cd uptake by water spinach under different phosphorus treatments.P. vittatawas grown for 60 d in a contaminated-soil amended with P fertilizer (+P) or phosphate rock (+PR), followed by water spinach cultivation for another 30 d. Plant biomass, As and Cd contents in plants and soils, and soil pH were analyzed. We found that,P. vittatacoupled with PR decreased the As concentration in water spinach shoots by 42%, probably due to As uptake byP. vittata. Moreover,P. vittatadecreased the Cd accumulation in water spinach by 24–44%, probably due to pH increase of 0.47–0.61 afterP. vittatacultivation. Taking together, the results showed thatP. vittatacoupled with PR decreased the As and Cd content in water spinach, which is of significance for improving food safety and protecting human health.