多效唑提高小麦幼苗抗低温能力的机理初探  

Study on the Mechanism of Improvement Coolproof of Wheat Seedings Treated with PP_(333)

作　　者：徐秋曼[1] 陈宏[1] 

机构地区：[1]天津师范大学化学与生命科学学院,天津300074

出　　处：《天津师范大学学报（自然科学版）》2006年第1期25-27,共3页Journal of Tianjin Normal University：Natural Science Edition

基　　金：天津师范大学博士基金资助项目(52LX06)

摘　　要：通过电导率测定、保护性酶活性及MDA含量的检测研究植物生长延缓剂(PP333)提高小麦幼苗抗低温能力的机理.结果表明,用PP333浸种后培养8 d的幼苗,经(3±0.5)℃低温胁迫后,能有效地降低相对电导率,维持较高的SOD活性,提高POD,CAT活性,减缓MDA的积累.同时,PP333处理可延缓幼苗生长,使幼苗生长健壮.The effect of PP333 on the resistance of wheat seedlings to chilling injury was investigated. It was found that wheat seedlings soaking with PP333 caused remarkable of electrolyte leakage during chilling （ 3 ± 0. 5 ） ℃ treatment. In the mean time, the increase of the activity of superoxide dismutase was faster and the content of malondialdehyde was lower in treated seedlings than the control, and the activities of peroxidase and catalase activity was also increased, PP333 can make wheat seedlings grow lowly and strongly.

关 键 词：小麦 多效唑 抗低温能力 

分 类 号：Q945[生物学—植物学]