Variability in physicochemical and nutritional properties of gum from combretum nigricans lepr. ex guill. & perr. from three climatic zones of Burkina Faso

In Burkina Faso, the consumption and marketing of Non-Timber Forest Products (NTFPs) contribute to food security and the well-being of the population. It is therefore important to develop valorization strategies that will promote sustainable management of species providing these NTFPs. The objectives of this study were to (i) contribute to a better knowledge of the physicochemical properties of gum from Combretum nigricans fom the three climatic zones of Burkina Faso (Sudanian, Sudano- Sahelian and Sahelian zones) and (ii) assess the nutritional value of this gum. The gum was harvested from different trees in nature reserves and then, for each climatic zone, a composite sample was taken for laboratory analysis. Analyses included moisture content, pH, ash content, nitrogen and protein contents, mineral content, total sugar content, fat content and secondary metabolite content (total polyphenols and total flavonoids). Results showed that climate significantly influences the physicochemical properties of C. nigricans gum. This gum has properties similar to those of gum arabic. It is mainly composed of carbohydrates and contains high rates of potassium, calcium and magnesium. C. nigricans gum has interesting nutritional properties and can therefore be used for food, commercial or industrial purposes.