Identification of Delta(7) phytosterols and phytosteryl glucosides in the wood and bark of several Acacia species


The wood and bark of four Acacia species growing in Portugal, namely, A. longifolia, A. dealbata, A. melanoxylon, and A. retinodes, were investigated for their sterol content. The lipids fractions of the different wood and bark samples were isolated, and the sterols were identified and quantified by GC-MS. Two Delta(7) sterols, specifically, spinasterol and dihydrospinasterol, were the main sterols found in considerable amounts, particularly in wood tissues (more than 0.5 g/kg of dry wood in the case of A. melanoxylon and A. retinodes). The corresponding unusual steryl glucosides were also identified in significant amounts in the wood and bark extracts.



subject category

Biochemistry & Molecular Biology; Nutrition & Dietetics


Freire, CSR; Coelho, DSC; Santos, NM; Silvestre, AJD; Neto, CP

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