DISSERTATION RESEARCH: Transport, sorption, and degradation of Cry1Ab toxin derived from genetically engineered corn crop byproducts in agricultural streams

论文研究：源自农业溪流中转基因玉米作物副产品的 Cry1Ab 毒素的运输、吸附和降解

基本信息

批准号：
0808480
负责人：
Jennifer Tank
金额：
$ 1.15万
依托单位：
University of Notre Dame
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2008
资助国家：
美国
起止时间：
2008-07-15 至 2010-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0808480&HistoricalAwards=false
关键词：
DISSERTATION RESEARCH Transport sorption degradation

项目摘要

Streams within agricultural landscapes receive genetically engineered corn leaves containing distinct and traceable compounds (hereafter 'Cry1Ab') through wind and surface runoff. Once in streams, Cry1Ab leaches from corn leaves; yet the dispersal of this leached material and its influences on stream ecosystems have not been determined. In terrestrial ecosystems, the fates of leached Cry1Ab have been studied in detail and include sorption to soil particles and degradation by soil microbes. Cry1Ab may behave similarly in streams; however, effects may be more widespread because stream flow may transport the material downstream. In this study, water samples collected along streams will be analyzed for Cry1Ab to determine its spatial distribution in the environment. In the laboratory, mesocosm experiments will determine the sorption capacity and degradation of the Cry1Ab in aquatic environments. Genetically engineered crops are being introduced at a rate that outpaces our scientific understanding of the potential effects that this new technology may have on stream organisms and habitats. Compared to terrestrial systems, we have a limited knowledge of how genetically engineered corn affects aquatic ecosystems. Cry1Ab does enter streams and may be transported downstream with unknown ecosystem consequences. It is essential to consider the effects of such materials in aquatic ecosystems, in order to fully understand the impacts that widespread planting of genetically engineered crops will have on our surface waters and the organisms they contain.

农业景观中的溪流通过风和地表径流接收含有独特且可追踪化合物（以下简称“Cry1Ab”）的基因工程玉米叶。一旦进入溪流，Cry1Ab 就会从玉米叶中滤出；然而，这种沥滤物的扩散及其对河流生态系统的影响尚未确定。在陆地生态系统中，已详细研究了浸出的 Cry1Ab 的命运，包括土壤颗粒的吸附和土壤微生物的降解。 Cry1Ab 在流中可能表现类似；然而，影响可能更广泛，因为水流可能会将物质输送到下游。在本研究中，将对沿溪流采集的水样进行 Cry1Ab 分析，以确定其在环境中的空间分布。在实验室中，介观实验将确定 Cry1Ab 在水生环境中的吸附能力和降解。转基因作物的引入速度超出了我们对这项新技术可能对河流生物和栖息地产生的潜在影响的科学认识。与陆地系统相比，我们对转基因玉米如何影响水生生态系统的了解有限。 Cry1Ab 确实会进入河流，并可能被输送到下游，造成未知的生态系统后果。为了充分了解基因工程作物的广泛种植将对我们的地表水及其所含生物体产生的影响，必须考虑此类材料对水生生态系统的影响。