B o i s e t f o r ê t s d e s t r o p i q u e s , 2 0 1 6 , n° 3 2 7 ( PROPAGATION VÉGÉTATIVE DE VITEX DONIANA SWEET À PARTIR DE SECTIONS DE RACINEVitex doniana Sweet est une espèce à usages multiples d'une grande importance socio-économique et commune en Afrique tropicale. Malgré sa forte utilisation en milieu rural, elle est encore présente à l'état sauvage. Il existe peu de données sur sa domestication. La propagation de cet arbre par bouturage de segments de racine constitue une alternative à sa difficile régénéra-tion sexuée. L'objectif de notre travail était d'évaluer deux des facteurs clés (substrat d'enracinement, diamètre des boutures) qui influencent l'aptitude des boutures de segments de racine (BSR) à néoformer des pousses feuillées et des racines. Le système racinaire de 23 arbres a été partiellement excavé sur une profondeur de 20 cm. Des BSR de 15 cm de long ont été disposées horizontalement dans des polypropagateurs sur cinq substrats différents, arrosés matin et soir. Le dispositif était un split-plot à trois ré-pétitions. Le traitement principal recouvrait cinq substrats : terre noire (Tn), sable fin (S), sciure de bois (Sc), 50 % Tn/50 % Sc (TnSc) et 50 % Tn/50 % S (Tn-S). Le traitement secondaire distinguait deux classes de diamètre (0,5-1cm ; 1,1-2,5 cm). Après la mise en culture des BSR, le temps de latence d'émer-gence était de 8 semaines pour les pousses aériennes et 12 pour les racines. Après 28 semaines, le pourcentage de pousses feuillées formées variait de 28 % (Tn) à 55 % (S). Les pousses aériennes se sont développées majoritairement (82 %) sur le pôle distal. Le diamètre des BSR a déterminé le déve-loppement des pousses feuillées (P < 0,01). Le taux de bourgeonnement des BSR oscillait entre 21,0 ± 1,8 % pour les BSR de 0,5-1 cm et 86,0 ± 7,8 % pour la classe 1,1-2,5 cm. Le diamètre a également impacté l'enracinement des BSR (P < 0,001). Le taux d'enracinement des BSR variait de 12,0 ± 2,3 % pour les petits diamètres à 59,3 ± 4,7 % pour les plus gros. La multiplication végétative par BSR peut améliorer la filière économique de V. doniana dans les hautes savanes guinéennes du Cameroun. Mots-clés :Vitex doniana, multiplication végétative, domestication, aptitude à l'enracinement, bouturage de segments de racine, Cameroun. ABSTrACT VEGETATIVE PROPAGATION Of VITEX DONIANA SWEET fROM ROOT SEGMENT CuTTINGSVitex doniana Sweet is a common multipurpose species in tropical Africa, which has considerable socio-economic importance. Unfortunately, it is extracted from the wild and there has been little or no focused effort to domesticate and cultivate the species. Mastering its propagation through root segment cuttings (RSC) is a real alternative to the difficult process of regeneration from seeds. The aim of our study was to assess two of the key factors (rooting medium and root diameter) that influence its rooting ability. The root system of 23 trees was partially excavated to a depth of 20 cm. Root segment cuttings 15 cm in length were carefully cut and arranged horizontally in a polypropagato...

Objective: Studies were conducted to characterize the Non-Timber Forest Products (NTFPs) from the locality of MayoRey in the North Region of Cameroon for their subsequent domestication.Methodology and Results: An ethnobotanical survey was conducted among 200 people drawn from four ethnic groups (Laka, Lamé, Peulh and Toupouri). This study has identified 107 plant species including 54 species food (vegetables, fruits and traditional drinks). The species Dioscorea bulbifera, Burnatia sp., Parkia biglobosa, Detarium microcarpum, Adansonia digitata, Vitellaria paradoxa, Ziziphus mauritiana, Ximenia americana and Vitex doniana were identified as major species of this town, due to their socio-economic importance. Plant parts used in the diet are descending fruits (53.70%), seeds (25.92%), leaves (22.22%), tubers (16.66%), the flowers (3.70%) and other (3.7%).Analyses on food uses indicates that 40 respondents use them as recipes involve fruits and 11 use them to prepare sauce. Three (3) species are commonly used for the preparation of pap, 8 species for the preparation of cuscus and 3 species for the preparation drink. Conclusion and application of results: The exploitation of these species remains traditional, sometimes leading to overexploitation of the resource and therefore a loss of biodiversity. For sustainable management of these resources, domestication of preferred species could be considered.

COVID-19 is a severe acute respiratory syndrome-related corona-virus SARS-CoV-2, that constitutes a pandemic threat to global public health. Unfortunately, there are no specific available therapies. This research work presents the findings of an investigation on traditional Cameroonian remedies of respiratory tract infections, malaria and viral infections, and also recipes that could serve as a baseline for the prevention, alleviate symptoms, treatment and perhaps may help for the anti-COVID-19 drugs discovery. Data on the medicinal plants were collected from traditional healers, Cameroonian medicinal plants books, the internet, and in addition to our personal experience as researchers and herbalists. Details of 85 plant species used to manage these three mentioned diseases in Cameroon and their pharmacological properties are recorded. Due to their ethnomedicinal uses and pharmacological activities, twenty-eight (28) plant species and 13 recipes are suggested for COVID-19 prevention, alleviate symptoms, treatment and baseline for anti-COVID-19 drug discovery. Amongst the proposed plants we have the following, Curcuma longa, Azadirachta indica, Zingiber officinale, Allium sativum and Ocimum gratissimum which were reported to possess certain inhibition properties against COVID-19 protease.

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Background:The reciprocity in the exchanges between the local populations who hold the authentic traditional knowledge that they share with the conservation biologists was not sufficiently taken into account. For fairness and justice in these exchanges, the Nagoya Protocol on Access and Benefit-sharing was established. However, there is a lack of information on access and benefit sharing in unfunded ethnobotanical studies in Africa (MS and PhD research). Traditional knowledge on Detarium microcarpum Guill. & Perr. a multipurpose Fabaceae, unfortunately threatened with extinction, exists in Adamawa, Cameroon. Thus, in relation to a Master Research thesis without funding, a study was dedicated to this plant.Methods: Ethnobotanical methods have made it possible to test the following hypothesis: for an equal number of men and women, the points attributed according to gender to the categories of reciprocity experienced during an ethnobotanical study without funding are equal. Thirty available informed consent volunteers (15 men and 15 women) with knowledge on this plant participated in this study.