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Clonal propagation of Detarium microcarpum and Khaya senegalensis

a step toward clonal forestry in Burkina Faso

Ky-Dembele, Catherine (2011). Clonal propagation of Detarium microcarpum and Khaya senegalensis. Diss. (sammanfattning/summary) Alnarp : Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880 ; 2011:21
ISBN 978-91-576-7556-9
[Doctoral thesis]

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The slow growth of seedlings and the impact of insect pests are major limitations to the use of indigenous species in plantations in Burkina Faso. Thus, the use of vegetative propagules and resistant clones may enhance the success of plantations. The objectives of this thesis were to develop efficient and simple clonal propagation methods for two indigenous species, Detarium microcarpum and Khaya senegalensis, and to compare the growth of sexual and asexual propagules. Two clonal propagation methods were developed: root cuttings for D. microcarpum and stem cuttings for K. senegalensis. Root segment length and diameter were key factors that affect sprouting and rooting ability. Root segments of 20 cm length and 15-60 mm diameter were the most successful. Stockplant and auxin application influenced root formation by leafy stem cuttings of K. senegalensis. High proportions of cuttings taken from seedling have rooted, while cuttings obtained from older trees rooted poorly, highlighting maturation as critical factor. The rooting ability of cuttings from older trees was improved by pollarding and auxin application. Comparison of sexual and asexual plantlets of D. microcarpum revealed that root suckers and seedling sprouts had a closer morphological resemblance. The well-established root system and the high carbohydrate concentrations in the roots of seedling sprouts may favor a growth comparable to that of root suckers. Seedlings and stecklings of K. senegalensis had similar growth patterns with respect to: the relative growth rates of stem length, leaf, stem, root and the total plant biomass; the biomass fraction to total plant biomass of leaf, stem and root; leaf area productivity; foliar carbon isotope ratio; and carbohydrate concentrations in roots. However, water stress was a major growth-limiting factor, resulting in a reduction in plant growth, biomass production, and carbohydrate concentration. As these studies constitute a first step toward the effective use of clonal propagules of D. microcarpum and K. senegalensis to ensure successful plantation, more investigations examining the effects of donors, the application of plant growth regulators are required in order to optimize the techniques.

Authors/Creators:Ky-Dembele, Catherine
Title:Clonal propagation of Detarium microcarpum and Khaya senegalensis
Subtitle:a step toward clonal forestry in Burkina Faso
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2011
Number of Pages:65
ALLI. Ky-Dembele C., Tigabu M., Bayala J., Savadogo P., Boussim I.J., Odén P.C. 2010. Clonal propagation of Detarium microcarpum from root cuttings. Silva Fennica, 44(5), 775-786. II. Ky-Dembele C., Tigabu M., Bayala J., Savadogo P., Boussim I.J., Odén P.C. 2010. Propagation of Khaya senegalensis by stem cuttings. (Submitted manuscript). III. Ky-Dembele C., Tigabu M., Bayala J., Ouédraogo S.J., Odén P.C. 2008. Comparison between clonal and sexual plantlets of Detarium microcarpum Guill. & Perr., a savanna tree species in Burkina Faso. African Journal of Ecology, 46(4), 602-611. IV. Ky-Dembele C., Bayala J., Savadogo P., Tigabu M., Odén P.C., Boussim I.J. 2010. Comparison of growth responses of Khaya senegalensis seedlings and stecklings to four irrigation regimes. Silva Fennica, 44(5), 787-798.
Place of Publication:Alnarp
ISBN for printed version:978-91-576-7556-9
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:khaya, forest trees, propagation by cuttings, growth, clones, drought stress, burkina faso
Keywords:Carbohydrates, carbon isotope ratio, root sucker, rootling, seedling, seedling sprout, steckling, vegetative propagation, water stress, West Africa.
Permanent URL:
ID Code:2455
Department:(S) > Southern Swedish Forest Research Centre
Deposited By: Catherine Ky-Dembele
Deposited On:11 Mar 2011 00:00
Metadata Last Modified:02 Dec 2014 10:18

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