Iranian Journal of Irrigation & Drainage

Iranian Journal of Irrigation & Drainage

The effect of salt water stress and melatonin on flowering and some morphophysiological traits of Viloa× wittrockiana

Document Type : Original Article

Authors
1 Department of horticulture sciences
2 Dept. of Horticultural Sciences, Sari Agricultural Sciences and Natural Resources University, Sari, Iran
3 Ph.D student, Dept. of Horticultural Sciences, Gorgan University of Agricultural Sciences and Natural Resources
Abstract
Violet is an annual ornamental plant that is widely used in urban green spaces. The aim of this study was to investigate the role of melatonin in reducing salinity stress in violet. The factors included melatonin at three levels (0, 50 and 100 μM) and salinity stress at four levels (0, 60, 30 and 90 mM). According to the obtained results, The highest plant height was observed in the treatment of 100 μM melatonin with an increase of 16.07% compared to the control without salt stress.The highest number of flowers was recorded in plants treated with 100 µM melatonin under 0, 30 and 60 mM salinity which showed a 50% increase in the number of flowers.The maximum root volume was in 100 μM melatonin under 30 mM salinity. The lowest percentage of relative plant water content was obtained at 90 mM salinity without the use of melatonin. Ionic leakage in salinity increased with increasing salt concentration. The highest sodium ion concentration of the plant was observed in the 60 mM salinity treatment without the use of melatonin, and the lowest sodium accumulation was observed in the no salinity treatment. The highest concentration of potassium element in salinity was recorded at 50 μM melatonin under 30 mM salinity. According to the obtained results, the use of melatonin is suggested to reduce damage to the violet plant under salt stress conditions.
Keywords

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