Abstract

 

Assessment of the healthy state of fruits and characterization of the seeds germination of Lannea microcarpa Engl. & K. Krause from Sahelo-Sudanian zones

Abstract

The parklands of the Sahelo-Sudanian zone of Burkina Faso exhibit many local fruit bearing species, among them Lannea microcarpa Engl . & K. Krause. The pulp of its fruits is edible and oil is extracted from its seeds. This species is under severe threat due to the over-exploitation and the low regeneration. The present study aims to understand to what extent fruits are damaged on field and the germination capacities of seeds. Ripe fruits were collected across two land use types (fields and fallows) on two sites. A total of 20 trees were harvested according to ten trees per site. Ripe fruits were sorted in the laboratory to separate healthy ones (lot 1) from the attacked ones (lot 2). Damaged fruits with apparently pest (insect) and fungi attacks were incubated in plastic bowls and petri dishes, respectively. Healthy fruits were submitted to three pre-treatments (entire fruits, fruits without pulp and decorticated fruits) dried under shadow for the germination tests. The results revealed 24.89% and 10.12% mean rates of attacked fruits, respectively in fallows and fields. Trees in fallows are more exposed to parasites (insects and fungi) and predators (birds). Fruits without pulp showed the higher germination rate (83.33%) for the post-harvesting test. The sturdiest seedlings resulted from fruits without pulp (height = 14 cm, diameter = 4 mm and higher leaf production). The pre-treatment “fruits stripped of pulp” must be recommended to stakeholders (foresters, breeders, farmers) for Lannea microcarpa breeding which is an adequate reproduction technic to assist the natural regeneration of aging natural populations of the species.

Keywords: Lannea microcarpa, fruit parasites, pre-treatment, germination

QualiTree

works to improve sustainable use of local tree species for fair-trade production of oils for food and cosmetics in Mali and Burkina Faso through a collaboration between researchers, private industries and local communities.

Financed by Danida.