【摘要】 通过保护性酶活性及脯氨酸、MDA含量的检测,电导率测定研究稀土元素铈减轻玉米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,能促进玉米幼苗脯氨酸累积.更多还原

【Abstract】 The effect of Ce(NH4)2(NO3)6 on the resistance of maize seedlings to Pb stress was investigated.It was found that seed soaking with Ce(NH4)2(NO3)6 caused remarkable decrease in electrolyte leakage from maize seedlings in Pb stress treatment.In the mean time,the increase in the activity of superoxide dismutase was faster and the content of malondialdehyde was lower in Ce(NH4)2(NO3)6-treated seedlings than in the control. Peroxidase and catalase activity was increased.Ce(NH4)2(NO3)6 enhanced proline content of maize seedlings.更多还原