Document Type : Research Paper

Authors

1 Professors in the Department of Agronomy, Islamic Azad University, Varamin, Iran.

2 1Ph.D. Student in the Department of Agronomy, Islamic Azad University, Varamin, Iran.

3 Assistant Professor, Department of Agronomy, Islamic Azad University, Varamin-Pishva.

Abstract

To investigate the effect of different levels of foliar applications salicylic acid and jasmonic acid on biochemical characteristics and yield of Thymus Vulgaris under drought stress conditions, a split factorial experiment based on randomized complete design with three replications was done during cropping seasons of 2019-2020 in Varamin region. The main factor were irrigation levels (60 (normal) and 110 mm of evaporation from the evaporation pan (drought stress)) and the sub factors were different levels of foliar application of salicylic acid (three level: control (zero), 25 and 50 mg l-1) and jasmonic acid (three level: control (zero), one and two mg l-1). The results showed that the higest plant height (38.2 cm), wet and dry weights (7112.3 and 1778.7 kg h-1), percentage of secondary metabolites (essential oil 0.28 and thymol 60.9%) and concentrations of salicylic and jasmonic acid of leaves and the lowest activity of antioxidant enzymes (SOD, CAT and GPX) of thyme was observed in normal irrigation with 50 and 2 mg -1 salicylic and jasmonic acid treatment. So external use of salicylic and jasmonic acid in drought stress conditions, can be considered to increasing the production of thyme.

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