Document Type : Original Research Article
Authors
1
Horticulture Dept., Fac. of Agric., Damanhour Univ., El-Beheira, Egypt
2
Forest and Wood Tech. Dept., Fac. of Agric. (El-Shatby), Alexandria Univ., Alexandria, Egypt
3
Floriculture Dept., Fac. of Agric. (El-Shatby), Alexandria Univ., Alexandria, Egypt
Abstract
Oenothera biennis L., the so-called “evening primrose”, has a significant ornamental and medicinal value. The aim of this research is to assess the impact of foliar spray with two synthetic cytokinins (N-(2-chloro-4-pyridyl)-N-phenylurea (CPPU) at concentrations of 20 and 30 ppm, and thidiazuron (TDZ) at concentrations of 75 and 150 ppm) on vegetative growth (e.g. plant height, branch number/plant, the fresh and dry weights of shoot/plant), flowering traits (e.g. flowers number/plant, number of days to flowering from seed sowing, flower diameter, and flower fresh and dry weights), seed yield traits (e.g. capsules number/plant, the fresh and dry weights of capsules, 1000 seed weight/plant and seeds weight/plant) and chemical traits (e.g. photosynthetic pigments, total carbohydrates, and minerals and oil-related compositions) for evening primrose plants. Results demonstrated generally that treatment with both CPPU and TDZ led to marked improvements across the studied traits compared to untreated plants. Applying TDZ at 75 ppm yielded the greatest results in terms of vegetative growth and chemical composition, excluding oil-related metrics. In contrast, CPPU at 30 ppm recorded the highest values for flowering performance, seed yield traits, and fixed oil composition. These findings suggest that regulated application of cytokinins can effectively enhance the agronomic and biochemical performance of Oenothera biennis, supporting its development as a high-value crop for ornamental and medicinal use in line with market demand.
Keywords
Main Subjects
)
View on SCiNiTO