Abstract
The effects of NaCl on the H2O2 content and the activities of catalase (CAT) and superoxide dismutase (SOD) were studied in diverse group of plants, such as a unicellular alga, Chlorella sp., an aquatic macrophyte, Najas graminea, and a mangrove plant, Suaeda maritima, all showing high tolerance to NaCl. Significant accumulation of H2O2 was observed in all the tested plants upon their exposure to 255 mM NaCl. The activity of both CAT and SOD increased significantly in response to the NaCl treatment. Growing the plants in presence of 255 mM NaCl also resulted in the synthesis of new isoforms of both CAT and SOD.
Abbreviations
- APX:
-
ascorbate peroxidase
- CAT:
-
catalase
- H2O2 :
-
hydrogen peroxide
- KCN:
-
potassium ferricyanide
- NBT:
-
nitroblue tetrazolium
- O2 •- :
-
superoxide
- •OH:
-
hydroxyl radical
- PAGE:
-
polyacrylamide gel electrophoresis
- ROS:
-
reactive oxygen species
- SOD:
-
superoxide dismutase
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Acknowledgements
The authors are thankful to Dr. B. Ravindran, the director of the Institute of Life Sciences, for providing the laboratory facilities for the work, and to DBT, New Delhi for financial support as extra-mural grant.
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Mallik, S., Nayak, M., Sahu, B.B. et al. Response of antioxidant enzymes to high NaCl concentration in different salt-tolerant plants. Biol Plant 55, 191–195 (2011). https://doi.org/10.1007/s10535-011-0029-3
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DOI: https://doi.org/10.1007/s10535-011-0029-3