Title: Effects of Drought Stress on Lipid Peroxidation,Antioxidant Enzyme Activities and Osmolyte Content in Leaves of Coffea canephora Seedlings
Abstract:Coffea canephora seedlings were used for the experiment at the age of about 8 months. Three levels of drought stress were applied in the present experiment, and the physiological indices of coffee lea...Coffea canephora seedlings were used for the experiment at the age of about 8 months. Three levels of drought stress were applied in the present experiment, and the physiological indices of coffee leaves were measured to understand the physiological responses to drought stress. Experimental results showed that when coffee seedlings were exposed to mild drought stress(relative soil water content of 55% to 60%), compared with the control group, soluble protein, soluble sugar and proline contents, SOD, POD and CAT activities increased significantly, while MDA contents and relative electrical conductivity had no significant change. But under moderate or severe drought stress(relative soil water content of 40% to 45% or 25% to 30%), soluble protein content, SOD, POD and CAT activities reduced significantly, while soluble sugar and proline accumulated relatively slowly, and MDA content, relative electrical conductivity increase rapidly. These results show that Coffea canephora seedlings have improved drought tolerance by increasing antioxidant enzyme activities and osmoregulation ability under suitable drought stress conditions.Read More
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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Cited By Count: 1
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