Acyl Lipid Metabolism in Germinating Hazel Seeds (Corylus avellanaL.)

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Abstract
A decreasing percentage of radioactivity from [U-14C]-oleate and [U-14C]-palmitate was recovered in the lipid fractions of germinating hazel cotyledons. The pattern of incorporation of the acids into the cotyledon glycerides was consistent with their degree of saturation. The relative incorporation into the cotyledon phospholipids changed during germination. Radioactivity from both acids was recovered in increasingly unsaturated fatty acids in the cotyledon hpids. Diversion of both [U-14C]-fatty acids into acyl lipid synthesis occurred in the germinating embryonic axes. Both were increasingly recovered in mixed glyceride groups which contained diglycerides and highly unsaturated triglycerides. The two acids gave different patterns of incorporation in the axis phospholipids. Desaturation of the acids occurred to a lesser extent than in the germinating cotyledons.

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