五类转基因农产品中抗营养素的初步检测

Determination of anti-nutrients in genetically modified crops

目的 对部分转基因作物和其亲本中的抗营养素含量进行了测定 ,初步探讨基因修饰对转基因农作物食用安全性的影响。方法 选取了国内和国外公司的部分转基因农产品包括大米、玉米、大豆、棉籽、油菜籽等样品 ,根据植物中常见的天然存在的抗营养素为基础 ,分别对其植酸、胰蛋白酶抑制剂、棉酚、硫代葡萄糖苷、芥酸等含量进行了测定 ,同时测定亲本样品中相应抗营养素的含量进行比较 ,以转基因农产品中抗营养素与亲本相差在 2 0 %为可接受范围 ,可视为“等同”。结果 一种转基因玉米、三种转基因油菜籽和两种转基因棉籽中的抗营养素含量未达到本实验规定的“等同”的要求 ,其余转基因产品的含量则基本在可接受的差异范围之内。结论 尚需多样本、多批次、大量的实验室数据来进行证实。

Objective In order to assess the safety of genetically modified crops,the anti-nutrients were determined in these novel crops and compared with their parental lines.Methods five kinds of crops (rice,maize,soybea n,cottonseed and rapeseed) from domestic and foreign companies were collected and the contents of anti-nutrients for each kind were analyzed.These anti-nutrients include phytate and protease-inhibitors (in rice,maize and soybean),gossypol (in cottonseed),glycosinolates and erucic acids (in rapeseed).Results and conclusi on The contents of anti-nutrients in one type of maize, three types of rapeseeds and two types of cottonseeds didn't meet the requirement of “equivalence” in this study,but the finally conclusion should be made after many experimental data in the future.