The cultivation modes and morphological and physiological characters were compared between Ws and the mutant PLDα1 of Arahidopsits thaliana,and the differences of the activities of anti-oxidant enzymes and the content of MDA between them dealed by ABA were also studied.The results showed that the mutant had obviously morphological difference with Ws and decreased sensitivity to ABA.After 24 hours dealed by ABA,the activities of SOD and POD of Ws changed rapidly and its content of MDA increased quickly,but t...