空心菜对Cd的耐性及食用安全性研究
Research on the Tolerance and edible safety of ipomoea aquatica to Cadmium Stress
本文采用了溶液培养法，研究了Cｄ胁迫下空心菜的根长、含水率以及体内重金属Cd含量的变化。结果表明，高浓度Cd 处理抑制了空心菜根系的伸长，低浓度的Cd处理促进了根长的伸长，其根系能够大量富集Cd，溶液中Cd离子浓度为70umol•L-1时，空心菜根系对Cd的富集能力的均值达到1967.52 496.75mg Kg-1。但是，在低浓度Cd1 umol•L-1时，其可食用部分的镉富集量为20.22 7.56 mg Kg-1超过了镉在食品中的国家标准值为0.05mg Kg-1（GB 15201-94），可见空心菜为食用不安全蔬菜。
hydroponic experiment was conducted to study the root length, water containing quantity and the change of cadmium content .It shows that the root system of ipomoea aquatica could accumulate a large amount of cadmium. When the cadmium concentration in the solution was 70umol•L-1 , its accumulation amounts could reach 1967.52 496.75mg Kg-1. Thus，ipomoea aquatica is an hyperaccumulator. The cadmium content of edible part in ipomoea aquatica exceeded the GB15201-94,so it is not a edible safe vegetable in area which has the threaten of heavy metal pollution .
张慧、薛艳、陈春梅
环境污染、环境污染防治环境生物学植物学
溶液培养，Cd，空心菜，重金属富集，可食用安全
Hydroponic Experiment Cd Ipomoea Aquatica Heavy Metal Accumulation Edible Safety
张慧,薛艳,陈春梅.空心菜对Cd的耐性及食用安全性研究[EB/OL].(2007-06-28)[2025-08-11].http://www.paper.edu.cn/releasepaper/content/200706-577.点此复制
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