NURSERY EXPERIMENT REPORT: THE RESPONSE OF CUTTINGS TO BASAL WOUNDING IN RELATION TO TIME OF AUXIN TREATMENT1
Brian H. Howard
Nineteen similar experiments were carried out on 16 nurseries by members of the Society.
Treatments, comparing the effect upon a range of species of making a basal wound, either before or after auxin application, together with non-wounding, gave results of three main types which appeared to be in part related to the kind of auxin preparation used, rather than the species.
- Wounding before auxin treatment was beneficial, with the suggestion that this was through improved uptake of IBA applied as a powder formulation.
- Wounding before auxin treatment was also detrimental, usually when IBA was applied in a readily absorbed alcoholic solution, suggesting supra-optimal uptake through the wound.
- With some subjects wounding was beneficial irrespective of the time of auxin application
The value of a better understanding of these processes is discussed relative to the need for achieving optimal conditions for propagation.
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