| Effects of water stress on activities of protective enzyme and physiological characteristics in seedlings of two varieties of sweet sorghum |
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| DOI：10.7606/j.issn.1000-7601.2010.04.17 |
| Key Words: sweet sorghum PEG stress physiological characteristic protective enzyme |
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| Abstract: |
| This study was to investigate the effects of different concentrations of PEG(10% and 20%) on activities of protective enzymes and other physiological characteristics in the seedlings of two varieties of sweet sorghum and to iden-tify the difference of their drought resistance. The results showed that the relative water content decreased under the PEG stress treatment, while the relative permneabilty of the plasma membrane, the content of malondialdehyde(MDA) and pra-line (Pro) increased, and the native species have larger change ranges. With the increasing of concentrations of PEC, the content of glutathione(GSH) in two species decreased. While the content of GSH in Xingaoliang 2 was higher than the native species under the concentration of 20 % PEG treatment. The activity of the antioxidant enzyme( APX, POD, SOD and CAT) in Xingaoliang 2 was higher than in the native species . The results indicated that Xingaoliang 2 have stronger drought resistant adaptability than the native species. |
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