STUDY ON WATER STRESS AND MELATONIN IN TOMATO (Solanum lycopersicum L.) AT SEEDLING STAGE
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Date
2020
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DEPARTMENT OF BIOCHEMISTRY B. A. COLLEGE OF AGRICULTURE ANAND AGRICULTURAL UNIVERSITY ANAND
Abstract
Tomato (Solanum Lycopersicum L., 2n=2x=24) belongs to the genus Solanum under the Solanaceae family. Its center of origin was Peruvian and Mexican region. It is one of the most popular vegetables widely grown in the world. It’s known as protective food, because of its special nutritive value and also its widespread production. Water deficit or drought stress is the most common environmental stress factor which limits plant productivity. Under drought stress, net photosynthesis is reduced caused by the regulatory mechanisms. Melatonin is a new plant growth regulator and it has been reported to alleviate the oxidative damages caused by water deficit stress. The presence of melatonin in plants is universal.
The present experiment was carried out to study the effect of water stress and melatonin in tomato (Solanum lycopersicum L.) at seedling stage in laboratory condition on various biochemical, photosynthetic pigment, osmolytes, enzymatic antioxidants, non-enzymatic antioxidants and molecular parameters in leaf of three tomato cultivars (1) ATL 11-05 (2) GAT 5 (3) AT 3 and five treatments i.e. (1) T1 = Control (Absolute control) (2) T2 = Hydropriming (Control) (3) T3 = Seed priming treatment of Melatonin (0.1mM) (4) T4 = Water stress ( At seedling stage ) and (5) T5 = T3 + T4.