铈减轻铅对水稻幼苗毒害的机理初探  

Mechanism Study on Improvement of Ce against Pb Stress of the Rice Seedlings

作　　者：徐秋曼[1] 陈宏[1,2] 程景胜[2] 

机构地区：[1]天津师范大学化学与生命科学学院细胞遗传与分子调控天津市重点实验室,天津300387 [2]天津大学化工学院,天津300072

出　　处：《稀土》2009年第1期26-30,共5页Chinese Rare Earths

基　　金：天津师大博士基金资助项目(52LX06)

摘　　要：通过保护性酶活性及叶绿素、MDA含量的检测,根系活力及电导率测定研究铈减轻水稻幼苗抗重金属铅毒害能力的机理。结果表明,用适宜浓度Ce(NH4)2(NO3)6浸种后培养的幼苗,经重金属铅胁迫后,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,能促进水稻幼苗叶绿素含量及根系活力的提高。Effect of Ce（NH4）2（NO3）6 on the resistance of rice seedlings to Pb stress was investigated. It was found that soaking with Ce（NH4）2（NO3）6 caused remarkable decrease of electrolyte leakage from rice seedlings daring Pb stress treatment. In the meantime, the increase of the activity of superoxide dismutase was faster and the content of malondialdehyde was lower in Ce（NH4）2 （NO3）6 - treated seedlings than the control. Peroxidase, catalase activity was increased. And Ce（NH4）2（NO3）6 can enhance chlorophyU content and the activity of root of rice seedlings.

关 键 词：水稻 Ce(NH4)2(NO3)6 抗铅胁迫能力 

分 类 号：Q945[生物学—植物学] O614.33[理学—无机化学]