African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12294

Full Length Research Paper

Variation in diosgenin level in seed kernels among different provenances of Balanites aegyptiaca Del (Zygophyllaceae) and its correlation with oil content

Bishnu Chapagain and Zeev Wiesman*
Phyto-Lipid Biotechnology Laboratory, Department of Biotechnology Engineering, The Institutes for Applied Research, Ben-Gurion University of the Negev,PO Box 653, Beer-Sheva 84105,ISRAEL.
Email: [email protected]

  •  Accepted: 15 September 2005
  •  Published: 30 November 2005

Abstract

Balanites aegyptiaca (Zygopyllaceae) is a widely grown desert plant with multi-use potential. It is found in most of the African continent, the Middle East, and South Asia; however, this plant remains one of the most neglected plant speciesIts seed kernel is used for oil extraction and the oil is used for human consumption and cosmetics. However, the oil cake is regarded as unsuitable for feeding because of the presence of many toxic substances. In this study, a spectrophotometric determination of diosgenin level and subsequent oil percentage analyses were carried out using the seed kernels ofBaegyptiaca collected from five Israeli provenances (Bet-Shean, Ein-gedi, Sapir, Samar, and Eilat) and five international locations (Burkina Faso, Senegal, Mali, Niger, and India). The results suggested that the sample from the Bet Shean Valley, which is considered the northern-most latitude where B. aegyptiaca naturally grows, contained the highest level of diosgenin as well as oil percentage; the Indian sample contained the lowest levels of both diosgenin and oil. The result also showed that there is a strong positive correlation (R2 = 0.849) between diosgenin level and oil percentage in the B. aegyptiaca seed kernel.

 

Key wordsBalanites aegyptiaca, provenances, kernel cake, diosgenin, oil content.