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'Oenothera biennis' (Common Evening-Primrose, Evening Star, or Sun Drop) is an ornamental plant with medicinal properties belonging to the 'Onagraceae-Oenotheraceae' family and native to North America. Evening primrose seed oil is used to deal with fat accumulation in the body, diabetes, premenstrual syndrome and other diseases, including eczema, mastalgia, cancer, multiple sclerosis and rheumatism. Recent studies have confirmed the presence of antioxidant activity in the polyphenols in evening primrose seeds. In order to evaluate the effect of different planting beds, organic fertilizers and drought stress, as the evening primrose's environmental and nutritional factors in growth and phytochemical properties, this experiment was carried out at the department of plant products research greenhouse in 2017. The experiment was performed using a completely randomized design in 4 treatments and with three replications. Seeds were planted in the prepared beds. Seedlings resulted from seeding and germination of seeds were transferred to different planting media. Growth characteristics were studied at the end of the plant growth period and before their flowering, and the ripe seeds after harvesting were used to measure 100 seed weight and biochemical traits. The results were analyzed statistically using one-way ANOVA. Also, simple correlation coefficients were calculated to obtain the ratio of characteristics with each other by Duncan's method.

australian journal of crop science

Effects of planting beds, nutrient treatment and drought stress on biochemical properties and vegetative traits of common evening primrose (Oenothera biennis L.) seeds