GROWTH, SEED YIELD, CHEMICAL COMPOSITION, AND OIL IN EVENING-PRIMROSE (OENOTHERA BIENNIS L.) PLANTS SUBJECTED TO TWO TYPES OF SYNTHETIC CYTOKININS
El-Kinany, R., El-Settawy, A., El-Naggar, H. (2025). GROWTH, SEED YIELD, CHEMICAL COMPOSITION, AND OIL IN EVENING-PRIMROSE (OENOTHERA BIENNIS L.) PLANTS SUBJECTED TO TWO TYPES OF SYNTHETIC CYTOKININS. EKB Journal Management System, 12(2), 49-63. doi: 10.21608/sjfop.2025.432522
Ramy Gaber El-Kinany; A. A. El-Settawy; H. M. El-Naggar. "GROWTH, SEED YIELD, CHEMICAL COMPOSITION, AND OIL IN EVENING-PRIMROSE (OENOTHERA BIENNIS L.) PLANTS SUBJECTED TO TWO TYPES OF SYNTHETIC CYTOKININS". EKB Journal Management System, 12, 2, 2025, 49-63. doi: 10.21608/sjfop.2025.432522
El-Kinany, R., El-Settawy, A., El-Naggar, H. (2025). 'GROWTH, SEED YIELD, CHEMICAL COMPOSITION, AND OIL IN EVENING-PRIMROSE (OENOTHERA BIENNIS L.) PLANTS SUBJECTED TO TWO TYPES OF SYNTHETIC CYTOKININS', EKB Journal Management System, 12(2), pp. 49-63. doi: 10.21608/sjfop.2025.432522
El-Kinany, R., El-Settawy, A., El-Naggar, H. GROWTH, SEED YIELD, CHEMICAL COMPOSITION, AND OIL IN EVENING-PRIMROSE (OENOTHERA BIENNIS L.) PLANTS SUBJECTED TO TWO TYPES OF SYNTHETIC CYTOKININS. EKB Journal Management System, 2025; 12(2): 49-63. doi: 10.21608/sjfop.2025.432522

GROWTH, SEED YIELD, CHEMICAL COMPOSITION, AND OIL IN EVENING-PRIMROSE (OENOTHERA BIENNIS L.) PLANTS SUBJECTED TO TWO TYPES OF SYNTHETIC CYTOKININS

Scientific Journal of Flowers and Ornamental Plants
Volume 12, Issue 2, June 2025, Page 49-63  XML PDF (327.24 K)
Document Type: Original Research Article
DOI: 10.21608/sjfop.2025.432522
View on SCiNiTO View on SCiNiTO
Authors
Ramy Gaber El-Kinany email 1; A. A. El-Settawy2; H. M. El-Naggar3
1Horticulture Dept., Fac. of Agric., Damanhour Univ., El-Beheira, Egypt
2Forest and Wood Tech. Dept., Fac. of Agric. (El-Shatby), Alexandria Univ., Alexandria, Egypt
3Floriculture 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
evening primrose; Oenothera biennis; CPPU; thidiazuron; fixed oil; GLC
Statistics
Article View: 107
PDF Download: 95