Effect of salicylic acid and abscisic acid on yield and yield components of common purslane (Portulaca oleracea) under water deficit

Document Type : scientific research article

Authors

1 1Faculty of Member, Dept. of Agriculture, Payame Noor University, Tehran, Iran,

2 Ph.D. of Crop Ecology, Dept. of Plant Eco-Physiology, Faculty of Agriculture, University of Tabriz,

3 Faculty of Member, Dept. of Agriculture, Payame Noor University, Tehran, Iran

Abstract

Effect of salicylic acid and abscisic acid on yield and yield components of common purslane (Portulaca oleracea) under water deficit
Abstract
Background and objectives: Purslane (Portulaca oleracea L.) is one of the most valuable herbs of the Portulacaceae family, which can be used as herbs and medicinal purposes. Water deficit is one of the major abiotic stresses that have adverse effects on plant growth and yield. The application of growth regulators such as salicylic acid and abscisic acid increases the resistance of plants to stresses and is a strategy to prevent the destructive effects of environmental stresses. Due to the low water resources in the country and the widespread use of purslane in the pharmaceutical, cosmetic, health and food industries, this study was conducted to investigate the effects of salicylic acid and abscisic acid on yield, yield components and some quantitative and qualitative traits of purslane forage under water deficit stress.
Materials and methods: Field experiment was carried out as split-plot based on randomized complete block design with three replications in 2018. Treatments were four levels of water supply (irrigation after 70, 100, 130 and 160 mm evaporation from class A pan) and three levels of foliar application (control (foliar application of water), foliar application of salicylic acid (1 μmolar) and foliar application of abscisic acid (50 μmolar). Irrigation and foliar application treatments were allocated to main and sub plots, respectively.
Results: Decreasing water supply led to reduction in number of capsules per plant, number of grains per capsule, number of grain per plant, biological and grain yield. Foliar application of salicylic acid and abscisic acid caused significant increase in number of capsules per plant (13.2 and 10.9% respectively), biological (15.2 and 13.1% respectively) and grain (16.1 and 13.3% respectively) yield. Fresh and dry forage yield and crude protein percentage and yield decreased 66.8, 65.7, 35.4 and 80.8% respectively as a result of water deficit. Fresh and dry forage yield and crude protein yield significantly enhanced by foliar application of salicylic acid and abscisic acid.
Conclusion: There was no significant difference between salicylic acid and abscisic acid foliar application. Therefore, regarding to beneficial effects of salicylic acid and abscisic acid on grain and forage yield of purslane, foliar application of salicylic acid and abscisic acid recommended for the study area. This would become more important under conditions where water availability is limited.
Keywords: drought stress, forage crude protein, growth regulators, purslane

Keywords

References

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Journal of Plant Production Research
Volume 27, Issue 3
December 2020
Pages 115-129

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