Exogenous Application of Salicylic Acid and Proline Increase Antioxidant Enzyme Activities at Low Temperature in Cucumber (Cucumis sativus L.)

By : Harpreet Kaur, Namarta Gupta

Page No: 217-223

Abstract
Seeds of cucumber were treated with salicylic acid (50 ppm and 100 ppm) and proline (5 mM and 10 mM) for 6 and 12 hr at two different temperatures 25°C and 20°C. In general, at 20°C seeds of cucumber recorded less germination percentage and activity of antioxidant enzymes (catalase, peroxidase and superoxide dismutase) as compared to at 25°C. When the seeds were treated with different concentrations of proline and salicylic acid increase in germination percentage and the enzymes activities was recorded as compared to control at both the temperatures. Among the treatments proline 10 mM recorded more germination percentage as compared to proline 5 mM over control and salicylic acid 100 ppm was more affective than salicylic acid 50 ppm.

Authors :
Harpreet Kaur and Namarta Gupta : Department of Botany, Punjab Agricultural University, Ludhiana -141004, India