Abstract
The patterns of incorporation of [l‐14C]‐acetate into the glycerolipid fatty acids of leaves of olive plants (Olea europea L. cv. Chétoui) suggested a specific pathway for a‐linolenic acid biosynthesis. The results confirmed the involvement of phosphati‐dylcholine in galactolipid metabolism, and seemed to exclude the role of that mole‐cule as a substrate for desaturation of oleate to linoleate. The two oleate desaturation steps seemed to occur rapidly on the diacylgalactosylglycerol molecule for biosynthesis of galactolipid linolenate. In addition, the results indicated a slow sequen‐tial desaturation of oleate to linolenate via linoleate in the phospholipid molecules (phosphatidylcholine, phosphatidylethanolamine and phosphatidylglycerol).
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