Abstract
Vesicular lipids of 24 citrus cultivars were extracted and purified, and the esterified sterol glucosides (ESG) separated from other vesicular lipids by chromatography. Fatty acids of the ESG were analysed by gas-liquid chromatography as their methyl esters. Statistical analysis showed that five out of six citrus species or biotypes could be differentiated from each other on the basis of profiles of the five major ESG fatty acids. Differences between midand late-season sweet orange cultivers were detected. Small differences were observed between white- and red-fleshed grapefruit cultivars. Profiles of the minor acids showed higher relative percentages of iso-branched fatty acids in lemons and limes, and higher relative percentages of 12: 0 and 14: 0 fatty acids in mandarin and mandarin hybrids than in other cultivars.
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