阿特拉津是一种均三氮苯类除草剂,其作用机理是取代质体醌与叶绿体类囊体膜上的32kDa蛋白的结合,从而阻断光系统Ⅱ的电子传递而使光合作用受阻。32kDa蛋白由叶绿体psbA基因编码,psbA基因的突变使32kDa蛋白的第264位丝氨酸变为苷氨酸或丙氨酸,从而丧失与阿特拉津结合的能力,导致对阿特拉津除草剂的抗性。由于阿特拉津除草剂在大豆产区的广泛使用,选择和培育阿特拉津抗性 Atrazine is a triazine-based herbicide whose mechanism of action is to replace the combination of the plastoquinone with the 32 kDa protein in the chloroplast thylakoid membrane, thereby blocking the electron transfer of photosystem II and blocking photosynthesis . The 32 kDa protein is encoded by the psbA gene of chloroplast and the mutation of the psbA gene changes the serine at position 264 of the 32 kDa protein to either a glycine or an alanine thereby losing the ability to bind to atrazine, Resistant. Due to the widespread use of atrazine herbicides in soybean producing areas, atrazine resistance is selected and cultivated