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Biologia Plantarum

, Volume 56, Issue 1, pp 149–152 | Cite as

Comparison of antioxidant responses to cadmium and lead in Bruguiera gymnorrhiza seedlings

  • Y. M. Tao
  • Y. Z. Chen
  • T. Tan
  • X. C. Liu
  • D. L. Yang
  • S. C. Liang
Brief Communication

Abstract

Seedlings of mangrove plant Bruguiera gymnorrhiza cultured in sand with Hoagland’s nutrient solution were treated with 1 to 30 mM Cd(NO3)2 or Pb(NO3)2 for 2 months. In all Cd/Pb treatments, the malondialdehyde content increased while the chlorophyll content declined. Peroxidase (POD) and superoxide dismutase (SOD) activities in roots increased at moderate Cd/Pb concentrations (1–10 mM), whereas decreased at higher concentrations (20–30 mM). Catalase (CAT) activity in roots was inhibited by 1–10 mM Cd but enhanced by 1–10 mM Pb. The activities of POD, SOD and CAT in leaves were less affected by Cd and Pb than in roots. A new SOD and three CAT isoenzymes were induced by Pb. In contrast, no additional SOD and CAT isoenzymes were induced by Cd.

Additional key words

antioxidant enzymes catalase mangrove peroxidase superoxide dismutase 

Abbreviations

CAT

catalase

MDA

malondialdehyde

PAGE

polyacrylamide gel electrophoresis

POD

peroxidase

ROS

reactive oxygen species

SOD

superoxide dismutase

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Notes

Acknowledgements

This work was carried out with financial support from the Natural Science Foundation of Guangxi Province (GuiKeZi No. 0991022Z).

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Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Y. M. Tao
    • 1
  • Y. Z. Chen
    • 1
    • 2
  • T. Tan
    • 1
    • 2
  • X. C. Liu
    • 1
    • 2
  • D. L. Yang
    • 1
    • 2
  • S. C. Liang
    • 1
    • 2
  1. 1.College of Life ScienceGuangxi Normal UniversityGuilinP.R. China
  2. 2.Key Laboratory of Ecology of Rare and Endangered Species and Environmental ProtectionGuangxi Normal University, Ministry of EducationGuilinP.R. China

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