Vol. 71 No: 2

Title:
Vegetative Propagation of Parkia Biglobosa (Jacq.) Benth., an Undomesticated Fruit Tree from West Africa

Authors:
Z. TEKLEHAIMANOT, HELEN TOMLINSON, T. LEMMA and K. REEVES

pp: 205-216

Abstract:
The rooting of single node leafy stem cuttings from seedlings of Parkia biglobosa (Jacq.) Benth. was examined with respect to provenance, auxin application, basal wounding, and the nodal position on the shoot. Provenances of P. biglobosa from three West African savanna ecozones: Derived, Guinea and Sudan were used for the study. In the absence of auxins and basal wounding, 40% of the cuttings rooted and 80% survived throughout the observation period of 6–8 weeks. However, the addition of auxins and wounding significantly affected the rooting of the cuttings. 100 ppm of the auxin α- napthalene acetic acid (NAA) was more effective than 100 ppm indole-3-butyric acid (IBA). However, when the concentration of both auxins was increased to 200 ppm, IBA was more effective than NAA. In general, wounding cuttings by making a diagonal cut at the end of the stem enhanced rooting, yet the application of 100 ppm NAA negated the beneficial effect. Bruising the stem was detrimental to rooting, except for cuttings from the Sudan provenance. Percentage survival and rooting were highest in cuttings taken from the terminal node and decreased progressively down the shoot. However, the rooting of cuttings from basal nodes was enhanced by wounding. The provenance from the Derived savanna rooted most easily, responding positively to low concentrations of both auxins and to wounding. The Guinea savanna provenance responded best to high concentrations of the combined auxins, whereas the Sudan savanna provenance achieved the highest percentage rooting with wounding alone.

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