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Journal of Plant Sciences
  Year: 2007 | Volume: 2 | Issue: 3 | Page No.: 260-272
DOI: 10.3923/jps.2007.260.272
 
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Accumulation of Phytosterols, Triterpene Alcohols and Phytostanols in Developing Zea mays L. Kernels

Saoussem Harrabi, Faouzi Sakouhi , Annik St-Amand , Sadok Boukhchina , Habib Kallel and Paul M. Mayer

Abstract:
Free sterol and free stanol components were determined in two varieties of sweet maize (Bonus and GH2547) and one variety of dent maize (Astro) during kernel maturation. The greatest change in these compounds occured in the early development period. At maturity the free sterols were mainly composed of 4-desmethyl sterols (64-85%), followed by 4,4-dimethyl sterols (14-33%) and 4-monomethyl sterols (0.5-3%). 4,4-Dimethyl sterols and 4-monomethyl sterols followed the same accumulation pattern (when expressed as a function of total lipid content) during seed maturation. Both of these free sterol forms reached a maximum at 30 days after pollination (DAP). 4-Desmethyl sterol concentrations exhibited a decrease during kernel development. The free stanols showed different trends as compared to the free sterols. Based on Fujika and Acadia`s results it is speculated that the decrease in total free stanol content observed at 30 DAP may be due to their potential conversion to brassinosteroids. The qualitative and quantitative differences observed in 4,4-dimethyl sterols and 4-monomethyl sterols suggested that these two minor fractions may be used as markers for the detection of oil adulteration.
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How to cite this article:

Saoussem Harrabi, Faouzi Sakouhi , Annik St-Amand , Sadok Boukhchina , Habib Kallel and Paul M. Mayer , 2007. Accumulation of Phytosterols, Triterpene Alcohols and Phytostanols in Developing Zea mays L. Kernels. Journal of Plant Sciences, 2: 260-272.

DOI: 10.3923/jps.2007.260.272

URL: https://scialert.net/abstract/?doi=jps.2007.260.272

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