Effects of saline water on antioxidant enzymes and yield of two cultivars of millet (Panicum miliaceum L.).

摘要

Millet (Panicum miliaceum L.) is an important crop for dry regions in Iran. This study was conducted to determine the differences of yield and antioxidant enzymes such as superoxide dismutase (SOD) and glutathione peroxidase (GPX) affected by saline water in two millet cultivars in 2011. In this work, the activity of SOD and GPX in millet cultivars (IE 750 and PR 268) was investigated in response to soluble sodium percentage (SSP) of irrigated water. The ranges of SSP varied from 20 to 60%. The results showed that PR 268 was more sensitive than IE 750 in response to sodium. About 20% more content of SOD and GPX was found in IE 750 than PR 268, and this was the main reason for increase about 14.6% of average final yield in this cultivar when SSP was 60%. We concluded that the rate of SOD and GPX was the major factor for decreasing the effects of sodium in millet.