Acta Physiologiae Plantarum

, Volume 22, Issue 4, pp 429–432 | Cite as

Metabolic responses of Lemna minor to lead ions II. Induction of antioxidant enzymes in roots

  • Małgorzata Garnczarska
  • Lech Ratajczak


Duckweed Lemna minor L. was grown on Wang culture medium supplemented with lead ions for 24 hours. Metal was tested at 1.5, 3 and 6 mg·dm−3 concentrations. The response of antioxidant enzymes, such as superoxide dismutase, catalase and peroxidase in lead-treated roots of duckweed was investigated. Lead ions had no effect on the spectrum of catalase and peroxidase isoenzymes while a new isoform of superoxide dismutase appeared on the Pb treated roots. A lead-depended increase in activities of superoxide dismutase and peroxidase was observed, whereas catalase activity was maintained at relatively constant values at lower lead concentrations and then decreased markedly below control level.

Key words

catalase peroxidase superoxide dismutase lead Lemna minor 

List of abbreviations






superoxide dismutase


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Copyright information

© Department of Plant Physiology 2000

Authors and Affiliations

  • Małgorzata Garnczarska
    • 1
  • Lech Ratajczak
    • 1
  1. 1.Department of Plant PhysiologyA. Mickiewicz UniversityPoznańPoland

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