Plant Physiology Laboratory, Dept. of Botany, Udai Pratap Autonomous College, Varanasi-221002, India.
Salicylic acid is a natural endogenous signal molecule involved to develop tolerance in plants against various biotic and abiotic stresses. The present study was conducted to determine the role of salicylic acid on growth and enzyme activities in cucumber cotyledons in absence and presence of nitrate nutrition. Salicylic acid (SA) treatments at lower concentrations (50 μM) showed significant increase in chlorophyll content and total non-structural carbohydrate (TNC). However, higher concentrations have inhibitory effects. Further, salicylic acid increases nitrate assimilation through the induction of nitrate reductase activity and accumulation of total nitrogen in isolated cucumber cotyledons. Present observations significantly show the role of salicylic acid in regulation of nitrogen nutrition in isolated cucumber cotyledons.
Cucumis sativus L., salicylic acid, nitrate nutrition, nitrate reductase activity, nitrate assimilation, cucumber cotyledons
