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Antimicrobial Activities Of Tannins Extracted From Rhizophora Apiculata Barks

Lim, S.H.., and Darah I., and Jain, K., (2006) Antimicrobial Activities Of Tannins Extracted From Rhizophora Apiculata Barks. Journal of Tropical Forest Science, 18 (1). pp. 59-65. ISSN 0128-1283

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Official URL: http://info.frim.gov.my/cfdocs/infocenter/jtfsonline/jtfs/v18n1/59-65.pdf

Affiliations

Universiti Sains Malaysia, School of Biological Sciences
Universiti Sains Malaysia, School of Biological Sciences
Universiti Sains Malaysia, School of Chemical Sciences

Abstract

Tannin which was extracted from barks of Rhizophora apiculata was further separated into hydrolysable and condensed tannin. The results of the study revealed that only hydrolysable tannin showed significant antibacterial and antiyeast activities but not antifungal activity. The minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) values of the tannin against bacteria and yeasts were also determined. Special attention was given to hydrolysable tannin which exhibited a significant antiyeast activity. The hydrolysable tannin was further tested in vitro for antifungal activity against Candida albicans, a pathogenic yeast which sometimes causes infection in human and animals. SEM and TEM microscopy studies revealed that the treated cells of C. albicans demonstrated severe morphological changes especially on its cell wall and cell membrane.

Tanin yang diekstrak daripada kulit kayu Rhizophora apiculata telah dipisahkan lagi kepada tanin terhidrolisis dan tanin terkondensasi. Hasil daripada kajian ini menunjukkan hanya tanin terhidrolisis mempamerkan aktiviti antibakteria dan antiyis yang berkesan, tetapi bukan aktiviti antikulat. Nilai kepekatan perencatan minimum (MIC) dan kepekatan bakterisid minimum (MBC) untuk tanin
terhadap bakteria dan yis juga ditentukan. Perhatian khusus diberikan kepada tanin terhidrolisis yang menunjukkan aktiviti antiyis yang berkesan. Tanin terhidrolisis telah diuji secara in vitro untuk aktiviti antiyis terhadap sel Candida albicans, iaitu sejenis yis patogen yang kadangkala menyebabkan jangkitan kepada manusia dan haiwan. Kajian mikroskopi SEM dan TEM membuktikan sel C. albicans yang dirawat dengan tanin terhidrolisis menunjukkan perubahan morfologi yang ketara terutama pada dinding dan membran selnya.

Item Type:Journal
Additional Information:The authors would like to thank the Ministry of Science, Technology and Innovation of Malaysia for providing the IRPA grant (09-02-05-2086 EA001) to support this investigation
Keywords:Hydrolysable tannin, condensed tannin, antimicrobial activity, fungi, minimum inhibitory concentration, bacteria, yeast
Subjects:S Agriculture, Forestry
ID Code:9114

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