Abstract
The effects of NaCl and polyethylene glycol (PEG) on superoxide dismutase (SOD) and peroxidase (P) activities, lipid peroxidation (LP) and proline content in seeds and leaves of drought tolerant (FC-506 and MS-100) and drought sensitive (MS-612 and MS-13) sugar beet cultivars were examined. After PEG and NaCl treatment in tolerant cultivars both in seeds and leaves SOD activity mainly increased, though P activity increased only in leaves of tolerant cultivars. In drought sensitive cultivars the decrease of SOD and P activity was mostly observed. LP increased in seeds and leaves of all examined cultivars. The proline content increased in the leaves of examined cultivars and was significantly higher in drought tolerant plants. On the other hand, in the seeds only slight increase in proline content was found. The results obtained indicated that drought tolerance could be correlated with high proline content and enzymatic defense against lipid peroxidation.
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Abbreviations
- LP:
-
lipid peroxidation
- MDA:
-
malonyldialdehyde
- P:
-
peroxidase
- PEG:
-
polyethylene glycol
- SOD:
-
superoxide dismutase
- TBA:
-
thiobarbituric acid
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Štajner, D., Mimica-Dukić, N. & Gasić, O. Adaptability to drought in sugar beet cultivars. Biol Plant 37, 107–112 (1995). https://doi.org/10.1007/BF02913005
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DOI: https://doi.org/10.1007/BF02913005