Abstract
AbstractSeeds ofCrambe abyssinica C.D. 6619 and theBrassica napus varieties Golden and Zero‐erucic were collected at different stages of maturity and the free lipid extracted with hexane. The lipid thus obtained was separated into lipid classes by silicic acid column chromatography. The lipid classes were further examined by thin‐layer chromatography and the component fatty acids and sterols by gas‐liquid chromatography.The relative amounts of the lipid classes in crambe and both rape varieties varied as the seed matured and a period of great change occurred about 10 days after fertilization. The greatest change was in triglycerides and phospholipids plus glycolipids. Free fatty acids, present in immature seeds, has almost disappeared at maturity. The lipid classes of crambe and both types of rape were in similar proportion at maturity. Differences in phospholipid and glycolipid composition were found between crambe and rape and between immature and mature rape. The fatty acid composition differred between lipid classes and changed with maturity. Changes in 18‐carbon acids of Zero‐erucic rape were concurrent with the development of erucic and eicosenoic acids in Golden rape.
Published Version
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