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Position: Home > Articles > Effect of La on Membrane Lipid Peroxidation of Maize Seedling Under Cd Stress Journal of Maize Sciences 2006,14 (4) 90-92+96

La对镉胁迫下玉米幼苗膜脂过氧化作用的影响

作  者:
王瑞妍;刘冰;周青;杨丽
单  位:
江南大学生物工程学院;江南大学工业生物技术教育部重点实验室
关键词:
玉米幼苗;La;Cd伤害;缓解效应;膜质过氧化
摘  要:
以水培法研究La对Cd胁迫下玉米幼苗膜脂过氧化的影响。实验结果表明,50~100 mg/LCd使玉米幼苗叶绿素含量下降9.5%~24.9%,丙二醛、超氧阴离子含量及质膜透性及CAT活性增加20.5%~37.2%、16.9%~53.8%、18.9%~35.3%和28.6%~67.1%。适量的La预处理使叶绿素含量下降1.1%~15.5%,使MAD、超氧阴离子、细胞质膜透性及CAT活性上升2.5%~22.8%、4.9%~20.9%、1.7%~24.6%和11.3%~36.0%,变化小于Cd组。表明适量的La能缓解Cd对玉米幼苗膜脂过氧化的影响,且对浓度为50 mg/L的Cd胁迫的缓解效果优于浓度为100 mg/L的Cd胁迫。玉米幼苗对低剂量的Cd胁迫伤害有自修复能力,适宜浓度的La可使玉米幼苗修复低剂量的Cd胁迫伤害的程度提高,进程加快。
译  名:
Effect of La on Membrane Lipid Peroxidation of Maize Seedling Under Cd Stress
作  者:
WANG Rui-yan1,LIU Bing1,ZHOU Qing2,YANG Li1(1.College of Biotechnology,Southern Yangtze University,Wuxi 214036,China;2.The Key Laboratory of Industrial Biotechnology,Ministry of Education,Southern Yangtze University,Wuxi 214036,China)
关键词:
Maize seedling;Lanthanum;Cd stress;Mediation domino offect;Membrane lipid peroxidation
摘  要:
Effects of lanthanum(La3+) on membrane lipid peroxidation of maize seedlings under Cd stress were investigated with hydroponics in laboratory conditions.The results indicated that the Chl under Cd1(50-100 mg/L) stress declined 9.5%-24.9%,and the MDA content,O2-· content,membrane permeability,CAT under Cd1 increased 20.5%-37.2%,16.9%-53.8%,18.9%-35.3%,28.6%-67.1% respectively.With the mediation of La,the declined level of Chl content fell from 1.1% to 15.5% and the increasing level of the MDA content,O2-· content,membrane permeability,the activity of CAT increased 2.5%-22.8%,4.9%-20.9%,1.7%-24.6%和11.3%-36.0%.La is more effective against 50 mg/L Cd treatment than that of 100 mg/L one.

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