Identification des usages de Sclerocarya birrea (A. Rich) hoscht dans la zone du Ferlo (Senegal) et evaluation du potentiel biochimique et nutritionnel de son fruit
2018
Le prunier d’Afrique ou Sclerocarya birrea est un arbre fruitier de la famille des Anacardiaceae, qui fournit aux populations des fruits consommables pendant la periode de soudure. Bien que presente dans les regions a climat soudano-sahelien du Senegal, sa zone de predilection demeure le Ferlo. Elle y fait l’objet de rehabilitation dans la mise en place du programme de l’Union Africaine dite de la muraille verte. Malheureusement, peu d’etudes scientifiques n’ont encore fait mention de la composition nutritive des fruits issus de cette zone. Dans le cadre de la reconstitution du couvert vegetal des zones arides, la connaissance des relations entre l’homme et son milieu s’avere importante. Ainsi, la presente etude est entreprise dans le but de connaitre les usages de Sclerocarya birrea et les potentialites qu’offre son fruit. Des enquetes ethnobotaniques ont permis de recueillir les connaissances sur les usages de l’espece dans la zone du Ferlo (Senegal). Des echantillons de fruits murs recoltes ont ete analyses grâce a des techniques de dosages normalises et conventionnelles. Les resultats revelent que les populations du Ferlo connaissent bien S. birrea , dont l’usage medicinal est de loin le plus important (79%). En usage medicinal, les organes vegetaux les plus utilises sont les ecorces et les feuilles. Les resultats obtenus sur la pulpe du fruit montrent qu'elle constitue une bonne source en vitamine C, en sucres, en Calcium, Magnesium, Potassium, Sodium et en Polyphenols totaux. L'huile de l'amande presente des caracteristiques qui dans l'ensemble restent dans la norme admise pour les huiles alimentaires. Ces resultats sont marques par une forte variabilite de la composition physico-chimique qui semble etre liees aux variations des conditions edaphiques et climatiques. Il ressort de cette analyse que le fruit de S. birrea constitue une excellente source de nutriments et peut valablement combler certaines carences nutritionnelles des populations autochtones. Par ailleurs, le fruit presente aussi des potentialites de transformation et de conservation qui doivent etre explorees. Mots cles: Sclerocarya birrea , fruits, usages, valeurs nutritionnelles, polyphenols, vitamine C, variabilite, Ferlo English Abstract The present study was undertaken to know the uses and some nutritional potentials of Sclerocarya birrea . The African plum tree called Sclerocarya birrea is a fruit tree of the Anacardiaceae family, which provides populations some consumable fruits during the lean season. Although it is present in Sudano-Sahelian regions of Senegal, its favorite repartition zone is the Ferlo. Sclerocarya birrea is being rehabilitated in the framework of the implementation of the African Union program called the “Green Wall”. Unfortunately, no scientific studies have mentioned the nutritional content of fruits coming from this area. In the context of the reconstitution of the vegetation cover, knowledge of the relations between man and his environment is important. Thus, the present study is undertaken with the aim of knowing the uses of Sclerocarya birrea and its fruits attibutes. According to that, ethnobotanical surveys have gathered knowledge on the species' uses in the Ferlo area (Senegal). Samples of ripe fruits harvested were analyzed using standard and conventional assay techniques. The results revealed that the populations of the Ferlo are well acquainted with Sclerocarya birrea and that its medicinal use is by far the most important (79%). In medicinal use, the most commonly used plant organs are barks and leaves. The results obtained on the pulp of the fruit showed that it is a good source of vitamin C, sugars, Calcium, Magnesium, Potassium, Sodium and total polyphenols. The almond oil has characteristics that remain within the accepted food standards. These results are marked by a high variability in the physicochemical composition, which appears to be linked to variations in edaphic and climatic conditions. The analysis shows that the fruit of Sclerocarya birrea is an excellent source of nutrients and can validly fill certain nutritional deficiencies of indigenous peoples. The fruit also has potential for transformation that needs to be explored. Keywords: Sclerocarya birrea , fruits, uses, nutritional values, polyphenols, vitamin C, variability, Ferlo
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