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Evaluation of Salicylic acid and spermidine on reduce drought stress injuries of one-year-old Maclura pomifera seedlings

Document Type : Research Paper

Authors

1 Assistant Professor, Department of Horticultural Sciences, Faculty of Agriculture and Natural Resources, Arak University, Arak, Iran

2 Professor, Department of Horticultural Sciences, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

3 Assistant Professor, Department of Horticultural Sciences, College of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

4 Assistant Professor, Department of Agricultural Sciences, Faculty of Agriculture, Shahed University, Tehran, Iran

5 Former M.Sc. Student, Department of Water Engineering, Faculty of Agriculture and Natural Resources, Arak University, Arak, Iran

Abstract

Drought is one of the most important environmental factors which limit the growth of woody plants. Iran is located in arid and semi-arid area therefore the growth and cultivation of ornamental trees and shrubs were limited. For this purpose, effect of foliar-applied salicylic acid and/or spermidine (0, 100, 500 and 1000 µmol) on reduce drought stress injuries of one-year seedlings ofOsage orange (Maclura pomifera) was examinedat the Horticultural Research Station, University of Tehran, in 2013.This study was conducted as a factorial based on completely randomized design with three replications. First, PGRs were foliar-applied for two consecutive days in during the early morning and the late afternoon and then plants were droughted by withholding water for 10 days. The damaging effects of drought on membrane leakage were reversed by low concentrations of salicylic acid and/or spermidine. Also, salicylic acid and spermidin at a concentration of 100 µmol stimulated catalase and superoxide dismutase activity, enhanced proline and chlorophyll content and maintained photochemical efficiency of chlorophyllunder drought stress. But Spermidine and salicylic acid at high concentrations were ineffective and/or inhibitors. Finally, our results showed that 100 µmol salicylic acid and/or spermidine maybe the best concentration for increasing of drought tolerance in young seedling, especially during transplanting and planting in permanent location.

Keywords

References
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Journal of Crops Improvement
Volume 18, Issue 1 - Serial Number 1
March 2016
Pages 231-244
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