铈对酸雨胁迫下水稻幼苗期防护与修复作用

发布时间：2018-03-05 07:04

本文选题：水稻幼苗　切入点：铈　出处：《环境化学》2016年12期 　论文类型：期刊论文

【摘要】：为进一步了解铈(Ce~(3+))对酸雨胁迫下植物的作用,采用溶液培养法探究Ce~(3+)对酸雨胁迫下水稻幼苗(30 d)的抗氧化酶系统(过氧化物酶POD、超氧化物歧化酶SOD)、丙二醛(MDA)、氧自由基产生速率、硝酸还原酶(NR)、质膜透性和叶绿素含量的影响.结果显示,与对照相比,模拟酸雨(pH 3.0)胁迫下,水稻幼苗NR活性和叶绿素含量降低,POD、SOD、MDA、质膜透性和氧自由基产生速率升高;在水稻叶面喷施30 mg·L~(-1)Ce~(3+)后,与酸雨组相比,防护组与修复组NR活性、叶绿素含量提高,POD、SOD、MDA、质膜透性和氧自由基产生速率降低.酸雨影响植物生长代谢,不利于植物健康生长.30 mg·L~(-1)Ce~(3+)对酸雨胁迫下水稻幼苗各生理指标具有改善作用,可以减轻酸雨对植物的危害,而不同指标防护与修复的作用不同.
[Abstract]:In order to further understand the effect of cerium cerifera on plants under acid rain stress, The antioxidant enzyme system (peroxidase POD, superoxide dismutase (SOD), malondialdehyde (malondialdehyde) MDAA) in rice seedlings under acid rain stress for 30 days was investigated by solution culture. The results showed that the NR activity and chlorophyll content of rice seedlings decreased under simulated acid rain (pH 3.0) stress, and the plasma membrane permeability and oxygen free radical production rate increased. Compared with acid rain group, the NR activity, chlorophyll content, plasma membrane permeability and oxygen free radical production rate of the protective group and the repair group were increased, the plasma membrane permeability and oxygen free radical production rate were decreased, and acid rain affected plant growth and metabolism. The physiological indexes of rice seedlings under acid rain stress were improved, and the harm of acid rain to plants was alleviated, but the protective and repair effects of different indexes were different.
【作者单位】：苏州科技大学化生学院;
【基金】：苏州市科技计划项目(SYN201413) 江苏省教育厅“高等学校大学生实践创新训练”(2014058)资助~~
【分类号】：X517;S511

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