In Vitro Regeneration Protocol for Securidaca longepedunculata Fresen., a Threatened Medicinal Plant within the Region of Lubumbashi (Democratic Republic of the Congo)
General Earth and Planetary Sciences; General Environmental Science
Abstract :
[en] Securidaca longepedunculata Fresen. is an overexploited forest species in the Lubumbashi region (south-eastern DR Congo), as its roots are highly valued in traditional medicine. Conventional propagation of this species is affected by seed dormancy and a high mortality rate during early seedling development. To improve on existing methods, we developed an in vitro seed germination protocol. After observing the germination rates, the effects of different doses (0.5, 1, 1.5, and 2 mg/L) of cytokinins (6-benzylaminopurine, kinetin, and meta-topolin) on S. longepedunculata seedling development were compared. Our results showed that soaking for 10 min in NaOCl (10%) followed by 5 min in ethanol (70%) effectively reduced the death rate of seeds while increasing the germination rate to almost 77%. The addition of cytokinins improved plantlet growth: a 12.2× increase in the number of plantlets was obtained with 1.5 mg/L meta-topolin, while only a single stem was obtained from the control. The effects of different auxin types on rhizogenesis did not differ significantly. The best recovery and rooting were noted with microcuttings from the basal parts of S. longepedunculata plantlets. Finally, the seedlings produced survived during the acclimatisation phase regardless of the type of substrate used. The established protocol provides a means for large-scale production of S. longepedunculata plantlets for the restoration of degraded landscapes and agroforestry.
Disciplines :
Agriculture & agronomy
Author, co-author :
Mulumbati, Magnifique Chuimika; Plant Breeding and Biotechnology Research Unit, Faculty of Agricultural Sciences, University of Lubumbashi, Lubumbashi P.O. Box 1825, Congo
Godoy Jara, Mario; Haute Ecole Provinciale de Hainaut Condorcet—Laboratory of In Vitro Culture, 7800 Ath, Belgium ; Center for Agronomy and Agro-Industry of the Province of Hainaut. 11, rue Paul Pastur, 7800 Ath, Belgium
Baboy Longanza, Louis; Plant Breeding and Biotechnology Research Unit, Faculty of Agricultural Sciences, University of Lubumbashi, Lubumbashi P.O. Box 1825, Congo
Bogaert, Jan ; Université de Liège - ULiège > Département GxABT > Biodiversité et Paysage
Werbrouck, Stefaan ; Laboratory of Applied In Vitro Plant Biotechnology, Department of Applied Biosciences, Faculty of Bioscience Engineering, University Ghent (UGent), 9000 Gent, Belgium
Sikuzani, Yannick Useni ; Research Unit in Ecology, Ecological Restoration and Landscape, Department of Renewable Natural Resources Management, Faculty of Agricultural Sciences, University of Lubumbashi, Lubumbashi P.O. Box 1825, Congo
Mazinga Kwey, Michel; Plant Breeding and Biotechnology Research Unit, Faculty of Agricultural Sciences, University of Lubumbashi, Lubumbashi P.O. Box 1825, Congo
Language :
English
Title :
In Vitro Regeneration Protocol for Securidaca longepedunculata Fresen., a Threatened Medicinal Plant within the Region of Lubumbashi (Democratic Republic of the Congo)
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