biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 43:73-78, 2000 | DOI: 10.1023/A:1026555030284

Effect of Calcium and Zinc on the Activity and Thermostability of Superoxide Dismutase

N.T. Bakardjieva1, K.N. Christov1, N.V. Christova1
1 Institute of Plant Physiology, Bulgarian Academy of Sciences, Sofia, Bulgaria

The effect of calcium and zinc ions on superoxide dismutase (SOD) from four plant species (Taxus baccata, Pinus sylvestris, Medicago rigidula, and Zea mays) was followed at three temperatures: optimal (20 °C), increased (50 °C), and high, inhibiting temperature (70 - 80 °C). At 20 and 50 °C in vitro added calcium increases SOD activity, but the degree was different for the plants investigated. The effect of zinc ions at the same temperatures varied in the investigated plants from activation to inhibition. An inhibiting effect of high temperature on SOD activity was diminished in the presence of calcium or zinc ions. It was shown that calcium and zinc ions can increase activity and thermostabilize different SOD isoforms.

Keywords: Medicago rigidula; Pinus sylvestris; SOD activation; Taxus baccata; Zea mays
Subjects: Medicago rigidula; Pinus sylvestris; superoxide dismutase activation, Ca, Zn; Taxus baccata; temperature, superoxide dismutase activation; Zea mays

Published: March 1, 2000  Show citation

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Bakardjieva, N.T., Christov, K.N., & Christova, N.V. (2000). Effect of Calcium and Zinc on the Activity and Thermostability of Superoxide Dismutase. Biologia plantarum, 43(1), 73-78. doi: 10.1023/A:1026555030284
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