Antioxidative enzymes in two in vitro cultured Salicornia species in response to increasing salinity
- 385 Downloads
The effects of salt stress on dry mass, lipid peroxidation, polyphenol and hydrogen peroxide content and activities of antioxidative enzymes were investigated in seedlings of Salicornia persica and S. europaea grown in vitro. Seeds were germinated under a broad range of NaCl concentrations (0, 100, 200, and 300 mM) on Murashige and Skoog medium for 45 d. Dry mass of both species increased at low (100 mM) salinity but decreased at higher NaCl concentrations. Malondialdehyde (MDA) content decreased at low salinity, whereas increased at 200 and 300 mM NaCl. H2O2 content in S. europaea was considerably enhanced by salinity, but it was not significantly affected in S. persica. The salt stress progressively enhanced the polyphenol content in S. persica, whereas in S. europaea, it increased with respect to the control only at higher salinities. In both species, the salinity progressively enhanced the superoxide dismutase (SOD) and peroxidase (POD) activities, whereas the CAT activity was only registered at the low salinity and the APX activity decreaseed in both species. The results indicate that S. persica exhibited a better protection mechanism against oxidative damage and it is more salt-tolerant than S. europaea.
Additional key wordsascorbate peroxidase catalase H2O2 malondialdehyde peroxidase Salicornia europea Salicornia persica superoxide dismutase
Unable to display preview. Download preview PDF.
- Aebi, H.:Catalase in vitro — Methods Enzmol. 105: 121–129, 1974.Google Scholar
- Chen, G.X., Asada, K.: Ascorbate peroxidase in tea leaves: occurrence of two isozymes and the differences in their enzymatic and molecular properties — Plant Cell Physiol. 30: 987–998, 1989.Google Scholar
- Folin, O., Denis, W.: On phosphotungstic-phosphomolybdic compounds as color reagents — J. biol. Chem. 12: 239–243, 1912.Google Scholar
- Sergiev, I., Alexieva, V., Karanov, E.: Effect of spermine, atrazine and combination between them on some endogenous protective systems and stress markers in plants — Compt. rend. Acad. Bulg. Sci. 51: 121–124, 1997.Google Scholar
- Waterman, P.G., Mole, S.: Analysis of Phenolic Plant Metabolites — Blackwell Scientific Publications, Oxford 1994.Google Scholar