Iranian Journal of Irrigation & Drainage

Iranian Journal of Irrigation & Drainage

The Effect of Salinity Stress on Water Productivity and Some Characteristics of (Dracocephalum moldavica L.) Using Melatonin

Document Type : Original Article

Authors
vahid shamsabadi 1
mohammadnaser modoodi 2
mahdi moradi 2
1 Assistant Professor, Department of Water Sciences and Engineering, University of Torbat-e Jam, Torbat-e Jam, Iran
2 Assistant Professor, Department of Horticulture Science and Engineering, University of Torbat-e Jam, Torbat-e Jam, Iran.
Abstract
The present study was conducted with the aim of investigating the effect of different levels of salinity stress and melatonin foliar application on water productivity and several characteristics of Dracocephalum moldavica L. in the research greenhouse of Torbat Jam Higher Education Complex. The experiment was performed as a completely randomized design with 3 replications and based on pot culture. In this experiment, the treatments included three levels of salinity stress (0-, 50- and 100-mM sodium chloride) and two levels of melatonin foliar application (zero and 100 μM). The results indicated that the application of 50- and 100-mM salinity stress resulted in a decrease of 18.66 and 35.47% relative water content and 22.21 and 30.74% water productivity and an increase 29.41 and 72.05% of leaf water and 32.52 and 64.16% compared to the control treatment. Also, the results showed that the highest percentage of essential oil occurred at 50 mM salinity at 0.562%. Also, the total amount of water used in each pot in each treatment was 9.33 liters. Also, the results showed that foliar spraying of melatonin at the rate of 100 micromolar increased 13.97, 20.72, 22.72, 15.38, 22.22, 8.54, 9.33, 20.74, 9.88 and 13.32% respectively, plant height, shoot dry weight, chlorophyll a, chlorophyll b, total chlorophyll, percent of relative water content, essential oil percentag, water productivity, leaf water potential and Electrolyte leakage percentage in Dracocephalum moldavica L. It seems that Dracocephalum moldavica L is sensitive to salinity stress and the application of salinity stress will lead to a decrease in the yield and yield components of this plant. Also, the results indicated that melatonin foliar spraying led to an increase in the tolerance of Dracocephalum moldavica L to salinity stress.
Keywords
Essential oil
Hormone
Sodium Chloride
Water Potential
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Iranian Journal of Irrigation & Drainage
Volume 19, Issue 2 - Serial Number 111
May and June 2025
Pages 175-183