PJB-2022-474
APICAL PINCHING AND EXOGENOUS APPLICATION OF CYTOKININ IMPROVES GROWTH AND FLOWERING QUALITY IN Eustoma grandiflorum CV. BLUE BELL
AQSA KANWAL
Abstract
Abstract
Blue bell (Eustoma grandiflorum) is an ornamental cut flower native to the southern parts of United States.it is a popular ornamental plant due to the attractiveness of its flowers, bright colours, and long vase life Pinching is one of the most effective strategies for growing cut flowers and potted plants. It reduces plant height and encourages more branches on the plant, resulting in a higher flower yield per plant. Plant growth regulation such as retardant can be used to suppress longitudinal growth to produce shorter plants and pinching treatment to form many well-arranged branches. Benzyl amino purine (BAP) generally act as a plant metabolite and growth retardant. It encourages the growth and cell division of dormant buds and bushiness of plant by reducing its height. Present study was conducted at Research Area Department of Horticulture, Pir Mehr Ali Shah Arid Agriculture University Rawalpindi during 2021-2022. The study explored different levels of pinching (no pinching, single pinching and double pinching) and BAP applications (0, 25, 50, 75 and 100 mg/L) respectively. Result obtained showed that double pinching and 100 mg/L BAP application were decreased plant height, reduced flower size, delayed flowering as compared to control treatment. It gives plant more bushy and compact look. Single pinching and 50, 75 and 100 mg/ L BAP application also result best in vase life, chlorophyll content and stem thickness respectively. While in control treatment maximum plant height, fresh weight, dry weight of flower and flower thickness obtained.
Keywords: Lisianthus; Pinching; BAP, Apical dominance.
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