Abstract
To evaluate oxidative stress and the plant antioxidant system of Alternanthera philoxeroides [Mart.] Griseb and Oryza sativa L. in the response to drought, root and leaf tissues of drought-treated A. philoxeroides and O. sativa were collected and relative water content, stomatal conductance, the concentrations of malondialdehyde, proline and the activities of superoxide dismutase, peroxidases, catalase and total antioxidative activity investigated. The results showed that drought treatment had almost no effect on relative water content in A. philoxeroides but reduced relative water content in O. sativa. A. philoxeroides maintained a greater stomatal conductance than O. sativa under drought stress. In A. philoxeroides levels of lipid peroxidation were lower than in O. sativa and did not change during the experiment. After exposure to drought, concentrations of proline and activities of superoxide dismutase, peroxidases and catalase in A. philoxeroides were between 10% and 30% higher than in O. sativa, whereas total antioxidative activity in A. philoxeroides was several-fold higher than in O. sativa.
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Abbreviations
- MDA:
-
Malondialdehyde
- SOD:
-
Superoxide dismutase
- POD:
-
Peroxidases
- CAT:
-
Catalase
- T-AOC:
-
Total antioxidative activity
- RWC:
-
Relative water content
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Acknowledgements
This study was supported by the National Natural Science Foundation of China (No. 30370807 and No. 30640043). The authors appreciate Prof. John Cram, and Prof. Guangxiao Yang for helpful discussions and manuscript revision.
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Gao, J., Xiao, Q., Ding, L. et al. Differential responses of lipid peroxidation and antioxidants in Alternanthera philoxeroides and Oryza sativa subjected to drought stress. Plant Growth Regul 56, 89–95 (2008). https://doi.org/10.1007/s10725-008-9291-6
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DOI: https://doi.org/10.1007/s10725-008-9291-6