Original scientific paper
https://doi.org/10.15177/seefor.14-09
Macropropagation of Dennettia tripetala Baker f.
Alfred Ossai Onefeli
; University of Ibadan, Faculty of Agriculture and Forestry, Department of Forest Resources Management, Ibadan, Nigeria
Adejoke Olukemi Akinyele
; University of Ibadan, Faculty of Agriculture and Forestry, Department of Forest Resources Management, Ibadan, Nigeria
Abstract
Background and Purpose: Dennettia tripetala Baker f. is a small fruit-producing tree, which both animals and humans depend upon for their survival. Consequently, there is a great pressure on the seed, which is the only alternative for its inexpensive propagation. Hence, the species has been rendered threatened in the forest. Based on this fact, this study examined the macropropagation of Dennettia tripetala in order to domesticate and ensure its continuous availability for human utilization.
Materials and Methods: The propagules (cuttings) used for this study were collected on five year old mother trees in Oloruntele, Ondo State while the experiment was conducted at the Department of Forest Resources Management, University of Ibadan, Nigeria. Cuttings were prepared using two factors; indole butyric acid (IBA) concentrations (0 ppm, 1000 ppm, 2000 ppm and 3000 ppm) and nodal positions (upper, middle and base), set under a high humidity propagator and watered twice a day. The experimental design used was a completely randomized design and the replication was done twice. Data were collected on percentage rooting, number of root per cutting, ramets’ height growth, ramets’ collar diameter and ramets’ leaf number. Statistical analysis was done using ANOVA.
Results and Conclusions: The optimum rooting was observed in 2000 ppm IBA treated cuttings (95.50 %) and upper nodal cuttings (72.39 %). ANOVA test shows that hormone concentrations and nodal positions significantly affected the rooting of D. tripetala. The study also showed that hormone concentrations and nodal positions do not significantly (p > 0.05) determine the ramet’s height growth of the species, being that the ramet that had the highest height was 0 ppm (6.11 cm) and middle nodal position (5.96 cm). From the findings, 2000 ppm IBA hormone and upper node have been discovered to be the ideal hormone concentration and nodal position at which five year old D. tripetala cuttings can be best rooted and survive.
Keywords
IBA hormone; hormone concentration; nodal position; stem cutting; Dennettia tripetala Baker f
Hrčak ID:
131689
URI
Publication date:
19.12.2014.
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