Antioxidative Response of Various Cultivars of Sorghum (Sorghum bicolor L.) to Drought Stress
2013
Singh Gurpreet | Sharma Nidhi
The present study was conducted with the aim to identify the response of antioxidant enzyme activities in seedlings of different sorghum cultivars under mannitol stress. Seven-day old seedlings were subjected to 100-500 mM mannitol stress which resulted in the decreases in shoot/root length and relative water content thus indicating the primary response to these tissues at phenotypic level. The level of lipid peroxidation as well as the specific activity of antioxidant enzymes such as peroxidase, catalase and superoxide dismutase increased at higher conc. except at 200 mM conditions. The level of catalase and peroxidase decreased at 500 mM conc. In the two different cultivars whereas the activity of superoxide dismutase consistently increased in response to the mannitol stress. Our data demonstrate that drought responsiveness tolerance in sorghum cultivars during germination is associated with enhanced activity of antioxidant enzymes.
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