当前位置: 首页 > 文章 > 精胺对荇菜抗氧化酶系汞毒害的缓解作用 生态学杂志 2008,27 (10) 1744-1748
Position: Home > Articles > Mitigation effects of spermine on Hg injury of Nymphoides peltatum’s antioxidant enzyme system Chinese Journal of Ecology 2008,27 (10) 1744-1748

精胺对荇菜抗氧化酶系汞毒害的缓解作用

作  者:
王学;徐恒戬
单  位:
山东理工大学生命科学学院
关键词:
荇菜;汞胁迫;精胺;抗氧化酶
摘  要:
研究了外施不同浓度的精胺(Spm)对15μmol·L-1汞胁迫下,荇菜(Nymphoides peltatum)叶中SOD、CAT、APX、POD保护酶的活性、O2·-产生速率、MDA、叶绿素、可溶性蛋白、游离态多胺含量的影响。结果表明:外施0.05~~0.5mmol·L-1的Spm显著提高了汞胁迫下荇菜叶内的亚精胺、精胺水平以及叶绿素和可溶性蛋白的含量;并能提高SOD、CAT和APX的活性,降低O·2-的产生速率,减缓MDA的积累;0.05~0.5mmol·L-1的外源Spm可增强植物抗氧化胁迫的能力,缓解汞对荇菜的毒害作用,其中0.05~0.1mmol·L-1的外源Spm效果最佳,但当Spm浓度达到5mmol·L-1时,却加剧了汞的毒害作用。
译  名:
Mitigation effects of spermine on Hg injury of Nymphoides peltatum’s antioxidant enzyme system
作  者:
WANG Xue, XU Heng-jian (College of Life Science, Shandong University of Technology, Zibo 255049, Shandong, China)
关键词:
Nymphoides peltatum; Hg stress; spermine; antioxidant enzyme
摘  要:
This paper studied the effects of different concentration exogenous spermine (Spm) on the activities of antioxidant enzymes (SOD, CAT, POD, APX), generation rate of O-·2, and contents of MDA, free polyamines (PAs), chlorophyll and soluble protein in Nymphoides peltatum leaves under 15 μmol·L-1 Hg stress. The results showed that under the Hg stress, 0.05-0.5 mmol·L-1 of exogenous Spm could significantly increase the contents of leaf spermidine (Spd), Spm, chlorophyll, and soluble protein, promote the activities of SOD, CAT, and APX, and decrease the generation rate of O-·2 and the accumulation of MDA. It was suggested that 0.05-0.5 mmol·L-1 of exogenous Spm could enhance the resistance of N. peltatum to oxidant stress, and mitigate the toxic effects of Hg. The optimum dose of exogenous Spm was 0.05-0.1 mmol·L-1, while 5 mmol·L-1 of Spm could aggravate the toxic effects of Hg.

相似文章

计量
文章访问数: 10
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊