| Effects of exogenous silicon on physiological effect of Cabernet Sauvignon seedlings under salt stress |
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| DOI：10.7606/j.issn.1000-7601.2008.05.35 |
| Key Words: silicon Cabernet Sauvignon seedling salt stress reactive oxygen antioxidant enzymes |
| Author Name | Affiliation | | LEI Yujuan | College of Enology, Northwest A ＆ F University, Yangling, Shaanxi 712100, China | | ZHANG Zhenwen | College of Enology, Northwest A ＆ F University, Yangling, Shaanxi 712100, China | | BAI Tuanhui | College of Horticulture, Northwest A ＆ F University, Yangling, Shaanxi 712100, China | | HAN Shanshan | College of Enology, Northwest A ＆ F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| The effects of silicon (Si) on physiological effect of Cabernet Sauvignon seedlings were investigated under salt stress in a nutrient solution culture system. The results showed that the salt stress treatment increased the superoxide radical(O-2) production rate and the content of hydrogen peroxide (H2O2), leading to the accumulation of malonaldehyde(MDA) and the relative permeability of membrane was also higher, while the activities of antioxidant enzymes, including superoxide dismutase(SOD), peroxidase(POD) and catalase(CAT), were promoted in seedlings. Exogenous 2.0 mmol/L Si treatment decreased significantly the content of MDA and O-2; and increased the activities of SOD and POD under salt stress. It indicates that exogenous 2.0 mmol/L Si treatment could alleviate the damage degree of 50 mmol/L NaCl stress through promoting antioxidant enzymes activities and suppressing ROS levels in seedlings under salt stress. |
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