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Sterol composition in Coincya (Brassicaceae)
Author(s) -
Vioque Javier,
Pastor Julio,
Vioque Eduardo
Publication year - 1995
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02636097
Subject(s) - campesterol , sterol , wax , botany , brassicaceae , composition (language) , biology , phytosterol , cholesterol , chemistry , food science , biochemistry , linguistics , philosophy
Sterol composition was determined for seed oils and leaf waxes in eleven taxa belonging to the genus Coincya (Brassicaceae) on the Iberian Peninsula (Spain and Portugal). Seed sterols ranged from 1.2 to 6.7%. The major components were sitosterol (42.6–54.6%), campesterol (20.4–33.2%), and brassicasterol (10.8–23.5%). In leaf waxes, the major free sterols were sitosterol (40.9–74.2%), campesterol (9.6–17.0%), and cholesterol (4.6–17.0%). In leaf wax esters, the major sterols were sitosterol (22.2–56.5%), cholesterol (7.3–32.8%), and campesterol (5.8–25.6%). An apparent substitution of brassicasterol in free sterols from the seeds by cholesterol in free sterols from the leaves was observed. There was an increase of cholesterol in sterols from leaf wax esters with respect to free sterols from leaves and seeds. In C. monensis subsp. nevadensis , the composition in sterols from leaf waxes may be an adaptation to low temperatures.