Effect of Mode of Auxin Application on Rooting and Bud Break of Shea Tree (Vitellaria paradoxa) Cuttings
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Date
2016
Journal Title
Journal ISSN
Volume Title
Publisher
American Journal of Plant Sciences
Abstract
Vegetative propagation by stem cutting is an important technique applied for agricultural production where rooting success is one of the major aspects. A study to assess the effects of mode of application of rooting hormones (IBA) on adventitious
root formation of V. paradoxa stem cuttings was conducted. Accordingly, four application methods were investigated in a 4 × 3 factorial experiment using a Completely Randomized Design (CRD). The application methods were: 24-hour extended soak, foliar spraying, basal quick dip and delayed IBA application method. Thus, the parameters used to determine rooting success were mean root length and root number. The effect of these application methods on occurrence of bud break was also
considered. On the whole, root length was observed to be a function of IBA concentration, whereby root length increased significantly (P ≤ 0.05) with an increment in IBA concentration. Stem cuttings subjected to 24-h extended soak at 100 ppm rooted
best (59.5% ± 8.33%), where as foliar sprayed stem cuttings exhibited the worst rooting success (11.9 ± 3.06 - 23.8% ± 4.16%). Bud break appeared to decrease with increasing IBA concentration and delaying IBA application enhanced rooting percentage
of the quick dip method by 7.1%, 9.5% and 11.9% at 2500 ppm, 3500 ppm and 4500 ppm, respectively. The extended soak method of IBA application at 80 ppm shows potential for large scale production of V. paradoxa through stem cuttings.
Description
Keywords
IBA Mode of Application, Shea Tree, Extended Soak Method, Bud Break
Citation
Okao, M., Ogwal, L., Mutoni, G., Alip, S.O., Okullo, J.B.L. and Okia, C.A. (2016) Effect of Mode of Auxin Application on Rooting and Bud Break of Shea Tree (Vitellaria paradoxa ) Cuttings. American Journal of Plant Sciences, 7, 2199- 2208.