茶叶多糖及其铈配合物对质粒DNA及有机磷农药的降解作用  

Effect of Complex Coordinating Tea Polysaccharide with Cerium on Degradation of Plasmid DNA and Organophosphorous Pesticides

作　　者：杜德红[1] 汪东风[1] 孙继鹏[1] 周裔彬[2] 孙丽平[1] 于丽娜[1] 

机构地区：[1]中国海洋大学食品科学与工程系,山东青岛266003 [2]农业部茶叶生物化学及生物技术重点开发实验室,安徽合肥230036

出　　处：《中国稀土学报》2005年第1期118-121,共4页Journal of the Chinese Society of Rare Earths

基　　金：青岛市科技计划项目(03 2 HH 3);山东省自然科学基金重点项目(2004ZRB01001);国家"863"项目(2001AA620503)资助

摘　　要：以茶叶多糖(TPS)为配体与四价的铈(Ce4+)结合,形成了水溶性的茶叶多糖铈配合物(Ce TPS)。在中性条件下,TPS及Ce TPS对质粒DNA(PlasmidDNA)有一定的裂解作用,对有机磷农药毒死蜱有很强的降解作用。将TPS及Ce TPS应用于大田,可有效降低菠菜中毒死蜱及乐果残留量,比对照低5倍以上,其中Ce TPS处理8d后毒死蜱及乐果残留量均低于国家标准(≤1.0mg·kg-1)。The results from our previous works proved that complexes coordinating alginic polysaccharides with cerium have remarkable degradation effect for plasmid DNA and the tea polysaccharide (TPS). The recent works show that both TPS and its coordinating cerium (Ce-TPS) can crack plasmid DNA and degrade chlorpyrifos at pH 7.0 and 37 ℃. The results from field experiment show that applying TPS and Ce-TPS on spinach can effectively reduce residual contents of chlorpyrifos and dimethoate in spinach. The residual contents of the chlorpyrifos and dimethoate in spinach applied Ce-TPS are lower than national standard (1.0 mg·kg^(-1)) after 8 d.

关 键 词：茶叶多糖 有机磷农药 降解作用 稀土 

分 类 号：O614.33[理学—无机化学]