Physiological Role of 6-BA in Plants
Cytokinins like 6-BA stimulate cytokinesis (active cell division) and regulate plant morphogenesis.
Applied exogenously at precise parts-per-million (ppm) concentrations, 6-BA overcomes apical dominance, prompting dormant lateral buds to develop into productive fruiting spurs and tillers.
- Hormone Family: Synthetic adenine-type cytokinin widely studied in plant physiology
- Cell Division: Accelerates cellular multiplication in developing young fruits and shoot tips
- Delay of Senescence: Retards chlorophyll degradation and protein breakdown, keeping leaves green
Agricultural and Horticultural Applications
Horticulturists apply 6-BA in fruit orchards, floriculture, and vegetable nurseries to achieve uniform fruit sizing, branching, and propagation.
In apple and pear orchards, it is widely utilized for post-bloom fruitlet thinning and enhancing lateral branch angles on nursery trees.
- Apple Production: Promotes selective fruit thinning and increases individual fruit diameter
- Floriculture: Encourages multiple side shoots and basal branching in roses and carnations
- Tissue Culture: Induces shoot organogenesis and micropropagation in commercial nurseries
Preparation, Dosage, and Handling Protocol
Because 6-BA is an active hormone effective at micro-concentrations, accurate measurement using precision scales is crucial.
Pure 6-BA powder exhibits low solubility in water and requires initial dissolution in a mild alkaline solution or alcohol before diluting into spray water.
- Concentration Precision: Carefully follow manufacturer ppm guidelines, as excessive doses cause malformed tissue
- Application Timing: Spray during active vegetative growth or immediate post-flowering stages
- Nutrient Pairing: Pair hormone sprays with balanced foliar fertilizers to fuel stimulated cellular growth
Official source
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Indian Council of Agricultural Research ↗Related on KisanPe
Common questions
Is 6-BA a fertilizer or a plant growth regulator?
6-BA is a synthetic cytokinin plant growth regulator (PGR), not a nutrient fertilizer, though it stimulates growth responses.
How does 6-BA help in fruit development?
It enhances cell division in young ovary tissues, leading to larger cell numbers and improved fruit size and shape.
Can 6-BA dissolve directly in cold water?
Technical 6-BA powder has low aqueous solubility and typically requires pre-dissolution in alcohol or dilute base before water dilution.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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