Biosynthèse des acides gras polyinsaturés des glycérolipides de la feuille d'olivier |
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Authors: | M Zarrouk B Marzouk A Chérif |
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Institution: | INRST, B.P. 95, 2050 Hammam-Lif, Tunisia. |
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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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Keywords: | Biosynthesis desaturation fatty acids glycerolipids Olea europea olive plant polyunsaturated |
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