Journal of
Medicinal Plants Research

  • Abbreviation: J. Med. Plants Res.
  • Language: English
  • ISSN: 1996-0875
  • DOI: 10.5897/JMPR
  • Start Year: 2007
  • Published Articles: 3835

Full Length Research Paper

Preliminary phytochemical and antimicrobial investigations of the stem bark and leaves of Psidum guajava L.

I. Elekwa*, S. C. Okereke and B. O. Ekpo
Department of Biochemistry, Abia State University, Uturu, Nigeria.
Email: [email protected]

  •  Accepted: 12 December 2008
  •  Published: 31 January 2009

Abstract

Extracts (ethanol, methanol and aqueous) of the leaves and stem barks of Psidum guajava L were studied for their phytochemical constituents. Results of the phytochemical screening revealed the presence of alkaloids (all the extracts), saponins (ethanol and methanol), cardenolides with steroided rings, and cardenolides with deoxy sugar (all the extracts). Thin layer chromatographic separation of ethanol and methanol extracts gave three spots each with Rf values ranging from 0.60 – 0.70. Only the aqueous extract inhibited Bacillus subtilis andFusarium spp. The presence of these constituents tends to support the uses of this plant medicinally.

 

Key words: Alkaloid, cardenolides, extracts, saponin.

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