【摘要】 研究构建了植物表达载体p1301-atzA,使来源于节杆菌(Arthrobacter sp.)AD1菌株的阿特拉津氯水解酶基因atzA受控于CaMV35s启动子下表达。用农杆菌介导法将植物表达载体p1301-atzA导入粳型保持系津稻107中,经潮霉素抗性筛选,得到可育的再生植株。转基因植株总DNA经PCR和Southern检测表明atzA基因已整合到水稻的基因组中。对转基因植株进行除草剂阿特拉津抗性检测,在喷施浓度为0.133％的阿特拉津溶液后,对照植株和敏感植株死亡,而转基因植株表现出对阿特拉津的抗性,保持正常生长,但不同转化株系的抗性表达水平不同。对转基因植株T,代进行的遗传分析表明,外源基因atzA能稳定遗传给后代,且大多数株系的分离比符合3:1。更多还原

【Abstract】 Atrazine chlorohydrolase gene (atzA) was cloned from Arthrobacter sp. AD1. A plant expression plasmid was constructed under the control of CaMV35s promoter and was used in rice transformation. The target gene was successfully introduced into mature embryos of a Japonica rice cultivar Jindaol07 by Agrobacterium- mediated transformation and hundreds of transgenic plants were obtained. The exogenous atzA gene in the transgenic plants that expressed atrazine resistance was confirmed with PCR and Southern blot analysis. The resistance experiments by spraying transgenic rice plants with 0.133% atrazine shown that most of the transgenic rice plants exhibited the resistance to herbicide atrazine. The segregation of exogenous atzA gene in T progeny corresponded to the Mendelian ratio.更多还原