Germination Dynamics of Crateva adansonii D.C. and Sarcocephalus latifolius (Smith) Buce: Key Forest Trees of Burkina Faso
Sibiry Albert Kaboré *
University Center of Tenkodogo, Thomas Sankara University, 01 BP 1757 Ouagadougou 12, Tenkodogo, Burkina Faso, Bioresources, Agrosystems and Environmental Health Laboratory, Rural Development Institute, Nazi Boni University, 01 PB 1091, Bobo-Dioulasso, Burkina Faso and Laboratory of Study and Research on Soil Fertility and Production Systems (LERF-SP), Rural Development Institute, Nazi Boni University, 01 PB 1091, Bobo-Dioulasso, Burkina Faso.
Jérôme Tégawendé Yaméogo
Bioresources, Agrosystems and Environmental Health Laboratory, Rural Development Institute, Nazi Boni University, 01 PB 1091, Bobo-Dioulasso, Burkina Faso.
Zézouma Sanon
Bioresources, Agrosystems and Environmental Health Laboratory, Rural Development Institute, Nazi Boni University, 01 PB 1091, Bobo-Dioulasso, Burkina Faso.
Norbert Ouédraogo
Bioresources, Agrosystems and Environmental Health Laboratory, Rural Development Institute, Nazi Boni University, 01 PB 1091, Bobo-Dioulasso, Burkina Faso.
Mipro Hien
Bioresources, Agrosystems and Environmental Health Laboratory, Rural Development Institute, Nazi Boni University, 01 PB 1091, Bobo-Dioulasso, Burkina Faso.
*Author to whom correspondence should be addressed.
Abstract
Crateva adansonii D.C. (Capparaceae) and Sarcocephalus latifolius (Smith) Buce (Rubiaceae) are two African tree species widely known as multipurpose species for rural populations. Unfortunately, these species are threatened in their natural stands by inappropriate management practices. In addition, their germination capacities are poor in their natural stands Our hypothesis is that the seeds of both species are capable of germination under certain conditions of temperature, light and germination medium. This work aims to study the germination capacity of these species under different conditions. Germination tests were carried out in the laboratory and in the field. 400 seeds of C. adansonii were used in five treatments and 960 seeds of S. latifolius in six treatments. Blotting papers and soil were used as media. Seeds were germinated under different temperature and light conditions over a period of 30 days. A seed was germinated when part of the embryo appeared. The maximum germination rate was obtained after 28 days for C. adansonii and 22 days for S. latifolius. The results show that the best germination rates of C. adansonii (85%) and S. latifolius (82%) are obtained when the seeds are exposed to white light for 12 hours, alternating with 12 hours of darkness. For generative propagation of these plants, it is recommended to germinate the seeds under optimal conditions and then to plant them instead of sowing them in the field.
Keywords: Seed multiplication, germination rate, germination test, germination kinetics, influence of light and temperature on germination