Chemical composition, antioxidant and antimicrobial activities of stem barks of Englerina gabonensis Engler and Sterculia tragacantha Lindl from Gabon

Cédric SIMA OBIANG, Rick-Léonid Ngoua-Meye-Misso, Guy-Roger Ndong-Atome, Joseph-Privat Ondo, Louis-Clément Obame-Engonga, Edouard Nsi-Emvo



Aim of this work was to evaluate the phytochemical constituents, antioxidant and antimicrobial potential of water-acetone, water-ethanol and water extracts of Englerina gabonensis and Sterculia tragacantha.Presence of phenols was evaluated to estimate the effects of plants on microbial diseases. Water-acetone, water-ethanol and water extracts were examined for antioxidant activities. All plant extracts were tested against six reference strains, eleven clinical isolates and two fungal strains.

Phenolic content were highest in the water-acetone and water-ethanol extracts from Englerinagabonensis in comparison with Sterculia tragacantha.The AAI (Antioxidant Activity Index)of water-acetone and water-ethanol extracts of Englerina gabunensis are superiors with 2. Plant extracts of Sterculia tragacantha show weak antioxidant activity (AAI < 0.5).The aqueous extract of Englerina gabonensis has a bactericidal effect on Salmonella Spp. Water-ethanol extract is bactericidal on Bacillus cereus LMG 13569 BHI, Salmonella Sppand Neisseria meningitides. Water-acetone extract presents a bactericidal activity on Enterococcus faecalis103907 CIP, Escherichi coli, Staphylococcus aureus, Acinetobacter baumanniiand Neisseria meningitides.

Our results suggest that Englerina gabonensis extracts contain greater antioxidant and antimicrobial properties than Sterculia tragacantha extracts.


Phytochemical, antioxidants, antimicrobial, Englerina gabonensis, Sterculia tragacantha.

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[1]. Nsi G, Obame LC, Ondo JP, Brama I, Mbading-Mbading W, Otogo E,Lepengue N, Souza A, Mbatchi B. Ethnotherapy study, phytochemical and antiradical activities of Agelaeapentagyna (Lam) Baill and Dialiumdinklagei Harms medicinal plants from Gabon. Int J adv Res. 2013;8: 246-255.

[2]. Stephen J. Pathogenesis of infections diarrhea. Canadian J Gastroentero. 2001; 15: 669-683.

[3]. Lila BM, Sakina S, Khodir M. Total phenolic content, antioxidant and antibacterial activities of fruits of Eucalyptus globulus cultivated in Algeria. Ind Crops Prod. 2013; 41: 85-89.

[4]. Afaf M, Afaf A, Mohammad A. Evaluation of antioxidant and antimicrobial potential of different leaves crude extracts of Omani Ficuscarica against food borne pathogenic. Asian Pac J Trop Dis. 2015; 5(1): 13-16.

[5]. Rahman MA, Imran T, Islam S. Antioxidative, antimicrobial and cytotoxic effects of the phenolics of Leeaindica leaf extract. Saudi J BiolSci. 2013; 20(3): 213-225.

[6]. Sabu M, Kattan R. Antidiabetic activity of medicinal plants and its relationship with their antioxidant property. J Ethnopharm. 2002; 81: 155-60.

[7]. Andzi BT, Massala KK, Obame LC, Lebibi J. Phytochemical studies, total phenolic and flavonoids content and evaluation of antiradical activity of the extracts of the leaves from Dischistocalyx sp. (Acanthaceae). J PharmPhytoch. 2015; 3(6): 174-178.

[8]. Walker R, Sillans S. Plantes utiles du Gabon. Edition Lechevalier, Sepia. 1961; 614.

[9]. Armand B. Féticheurs et médecines traditionnelles du Congo. O.R.S.T.O.M, Paris .1969;36:82.

[10]. Sima OC, Obame ELC, Ondo JP, Zongo C, Nsi EETraoré AS. Ethnotherapy study, phytochemical screening and antioxidant activity of Antrocaryonklaineanum Pierre and Anthocleistanobilis G. Don. medicinal plants from Gabon. Inter J Adv Res. 2015; 3(5): 812-819.

[11]. Gassita JN. La nouvelle pharmacopée pragmatique africaine (N.P.P.A): justification scientifique et applications industrielles. Pharm MédtradAfr. 1995; 95-100.

[12]. Manish K, Subodh K, satwinder K. Investigations on DNA protective and antioxidant potential of chloroform and ethylacetate fractions of Koelreuteriapaniculata Laxin. Afr J Pharm Pharmacol. 2011; 5(3): 421-427.

[13]. Manab M, Saikat P, Raihan M, Mohabul AM, Sukhendu M, Vivekananda M.In vitro antibacterial potential of Hydrocotylejavanica Thunb. Asian Pac J Trop Dis. 2016; 6(1): 54-62.

[14]. Naz R, Bano A, Yasmin H, Ullah S, Farooq U. Antimicrobial potential of the selected plant species against some infectious microbes used. J Med Plants Res. 2011; 5(21): 5247-5253.

[15]. Rabia N, Asghari B. Phytochemical screening, antioxidants and antimicrobial potential of Lantana camara in different solvents. Asian Pac J Trop Dis. 2013; 3(6): 480-486.

[16]. Obame LC, Andzi BT, Ondo JP, Imaël HN. Total phenolic composition, antibacterial and antioxidant activities of Fagaraheitzii Aubr.&Pellegr.medicinal plant of Gabon. VRI Phytomed. 2013;1(3): 64-69.

[17]. Scherer R, Godoy HT. Antioxidant activity index (AAI) by 2,2-diphenyl-1-picrylhydrazyl method. Food Chem. 2009; 112: 654-658.

[18]. Bors W, Hester W, Michel C, Saran M. Flavonoids as antioxidants: determination of radical scavenging efficiencies. Methods Enzym. 1990; 186: 343-355.

[19]. Zongo C, Savadogo A, Ouattara L, Bassole IHN, Ouattara CAT, Ouattara AS, Barro N, Koudou J, Traore AS. Polyphenols content, antioxidant and antimicrobial activities of Ampelocissusgrantii (Baker) Planch. (Vitaceae), a medicinal plant from Burkina Faso. Inter J Pharmacol. 2010; 6(6):880-887.

[20]. Ngoua-Meye MRL, Ondo JP, Assam EJN, Orango BJO, Sima OC, Ndong JD, Ovono AF, Obame ELC. Phytochemical screening, antioxidant and antiangiogenic properties of Oncobawelwitschii (Oliv.) Gilgn. And Tetrorchidiumoppositifolium (Pax. and Khoffm.), medicinal plants from Gabon. Inter J Innov Res SciEng Tech. 2017; 6(1): 1-10.

[21]. Sima OC, Ondo JP, Ndong AGR, Obame ELC, Djoba SJF, Nsi EE. Phytochemical screening, antioxidant and antimicrobial potential of stem barks of Coula edulis Baill. Pseudospondias. longifolia Engl. and Carapaklaineana Pierre from Gabon. Asian Pac J Trop Dis. 2016; 6(7): 557-563.


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