Journal of Pure and Applied MicrobiologyVol. 4 No. 2

A Study of Antimicrobial Activities of Plant Extracts (Talisia squarrosa and Mora gonggrijpii)

Orson La Rose¹, S. Gomathinayagam²*, Gregory Blyden³ and Phillip Da Silva4

¹Department of Chemistry, Division of Natural Science, University of Guyana, Johns Science Centre, Berbice Campus, Guyana. ²Faculty of Agriculture and Forestry, University of Guyana, Berbice Campus, Johns Science Centre, Guyana. ³Department of Chemistry, Faculty of Natural Science, University of Guyana, Turkeyen Campus, Guyana. 4Department of Biology, Division of Natural Science, University of Guyana, Johns Science Centre, Berbice Campus, Guyana.

Received on 23 April 2010 and accepted on 05 June 2010

 

ABSTRACT

The anti-microbial activity of extracts from different vegetative parts of two plant species found in Guyana was evaluated. The selected plants belong to two families: Sapindaceae: Talisia squarrosa; and Fabaceae: Mora gonggrijpii. The standard method was used to obtain plant extracts. The extracts were evaluated in independent bioassays against fungal and bacterial pathogens using different concentrations. The antimicrobial activities of Talisia squarrosa and Mora gonggrijpii were studied using the poison plate method, well diffusion method (antifungal activities) and streak plate method (antibacterial activities). Mora gonggrijpii showed 50% inhibition of fungus at concentration of 0.43g/ml. Phytochemical examination of Talisia squarrosa and Mora gonggrijpii revealed the presence of anthracenosides, tannins, anthocyanins, couramins, saponins and steroid glycosides. The activities displayed by the extracts can be attributed to the presence of these phytochemicals.

Keywords : Talisia squarrosa, Mora gonggrijpii, antimicrobial activity, phytochemical analysis. Poison plate