转Bt 基因水稻中融合 Cry1Ab/1Ac 蛋白在土壤和水中的命运。
The fate of fusion Cry1Ab/1Ac proteins from Bt-transgenic rice in soil and water.
机构信息
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
出版信息
Ecotoxicol Environ Saf. 2016 Feb;124:455-459. doi: 10.1016/j.ecoenv.2015.11.025. Epub 2015 Nov 28.
Toxin proteins form transgenic crops entering into the environment are likely affect non-target organisms. To investigate the entry route and fate of fusion Cry1Ab/1Ac proteins from transgenic rice expressing insecticide toxins from Bacillus thuringiensis (Bt) in soil and water, we conducted greenhouse and field experiments in 2013 and 2014. Cry1Ab/1Ac proteins from Bt-transgenic rice in soil was found within a horizontal range of 25cm, where most of plant roots distributed. Concentration of Cry1Ab/1Ac proteins was lower in water than in soil in the greenhouse experiment, and no Cry1Ab/1Ac protein was detected in field water. Cry1Ab/1Ac concentration from rice straws was higher in ditch water than in distilled water due to the existence of aquatic organisms in ditch water. Bt proteins from transgenic crops enter into soil ecosystems mainly through root exudates and into aquatic ecosystems through plant residues, which determines Bt fate in the environment.
毒素蛋白形成的转基因作物进入环境后，可能会影响非目标生物。为了研究表达苏云金芽孢杆菌（Bt）杀虫毒素的转基因水稻中融合 Cry1Ab/1Ac 蛋白进入土壤和水中的途径和命运，我们于 2013 年和 2014 年在温室和田间进行了实验。在温室实验中，我们发现Bt 转基因水稻中的 Cry1Ab/1Ac 蛋白在水平范围内的 25cm 内，大部分植物根系都分布于此。Cry1Ab/1Ac 蛋白在土壤中的浓度比在水中低，而在田间水中未检测到 Cry1Ab/1Ac 蛋白。由于沟渠水中存在水生生物，稻草中的 Cry1Ab/1Ac 浓度在沟渠水中高于在蒸馏水中。来自转基因作物的 Bt 蛋白主要通过根系分泌物进入土壤生态系统，通过植物残体进入水生生态系统，这决定了 Bt 在环境中的命运。
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