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生态学杂志 ›› 2009, Vol. 28 ›› Issue (11): 2208-2212.

• 研究报告 • 上一篇    下一篇

镍对高冰草幼苗生长及活性氧代谢的影响

鲁艳**;何明珠;赵昕;刘玉冰;谭会娟;李新荣   

  1. 中国科学院寒区旱区环境与工程研究所沙坡头沙漠研究试验站,兰州 730000
  • 出版日期:2009-11-10 发布日期:2009-11-10

Effects of Ni stress on Agropyron elongatum seedlings growth and reactive oxygen species metabolism.

LU Yan;HE Ming-zhu;ZHAO Xin;LIU Yu-bing;TAN Hui-juan;LI Xin-rong   

  1. Shapotou Desert Research and Experiment Station, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Online:2009-11-10 Published:2009-11-10

摘要: 本文对镍处理下高冰草幼苗生长,茎部和根部丙二醛(MDA)含量,可溶性蛋白含量,超氧化物岐化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性及叶片光合色素含量的变化进行了研究。结果表明,低浓度镍(10 μmol·L-1)对高冰草幼苗生长无显著抑制效应,但随镍浓度增加各项生长指标显著减少,且镍对高冰草幼苗根部损伤更为显著。光合色素含量随镍浓度升高呈减少趋势。高冰草茎部和根部MDA含量与镍浓度呈显著正相关关系。根部可溶性蛋白含量随镍浓度升高呈增加趋势。低浓度镍处理(10 μmol·L-1)下,SOD、POD和CAT活性均有所提高,保护酶系统处于正常状态,但随镍浓度升高,3种保护酶活性受到不同程度抑制,保护酶系统平衡被破坏。

Abstract: Agropyron elongatum seedlings were exposed to different concentration Ni to study their growth and the changes in MDA and soluble protein contents and  SOD, POD and CAT activities in their shoots and roots, and the photosynthetic pigment content in their leaves. Low concentration (10 μmol·L-1) Ni had no significant inhibitory effects on the seedlings growth, but the growth indices decreased significantly with increasing Ni concentration, being more markedly for roots than for shoots. The leaf photosynthetic pigment content had a decreasing trend with increasing Ni concentration, while the MDA content in shoots and roots had significant positive correlation with Ni concentration. The soluble protein content in roots increased with increasing Ni concentration. Under low concentration (10 μmol·L-1) Ni, the SOD, POD and CAT activities all increased, and the protective enzyme system was well balanced. When the Ni concentration was increasing, the three enzyme activities were inhibited to different extents, and the balance of protective enzyme system was broken.

Key words: Photosynthesis of crop community, CO2 flux density, Water use efficiency, Winter wheat