Author/Authors :
NiKi Esfahlan، Elham نويسنده Young Researches and Elites Club, Islamic Azad University, Shahr-e-Rey Branch, Tehran, Iran , , Pazoki، Alireza نويسنده Department of Agronomy and Plant breeding, Islamic Azad University, Shahr-e-Rey Branch, Tehran, Iran , , Rezaei، Halimeh نويسنده Department of Plant Physiology, Islamic Azad University, Damghan Branch, Semnan, Iran , , Eradatmande Asli ، Davood نويسنده Department of Agriculture, Payame Noor University, Tehran, Iran , , Usefirad، Mojtaba نويسنده Department of Agronomy and Plant breeding, Islamic Azad University, Saveh Branch, Saveh, Iran ,
Abstract :
Ascorbate is a strong antioxidant which has remarkable biological effects on plants growth, including an improvement in plantsʹ tolerance under salinity stress conditions. In the present study, the effect of salinity stress and its interaction with ascorbic acid was investigated on some morphological traits, cell membrane stability, leaf relative water content, and extract yield of purslane (Portulaca oleracea L.) under greenhouse conditions. This research was down as factorial based on completely randomized design with 4 replications. The plants were treated in different concentrations of sodium chloride (0, 70, 140, and 210 mM) and ascorbic acid (0, 10, and 20 mM) for 4 weeks after germination. In the treated plants with salt, increases in sodium chloride concentration reduced growth parameters such as roots and shoots fresh and dry weights, roots and shoots lengths, extract yield and relative water content (RWC). However, cell membrane stability and extract percent increased. Under the same salt stress conditions, increase in ascorbic acid concentrations improved all the studied characters, so that spraying 20 mM ascorbate conducted to the maximum amount of extract percentage (0.0054 %) and extract yield reduced
(0.037 g/plant). The study also revealed that purslane is a medicinal plant with a high resistance to salinity stress and can generally be cultivated in saline soils.
