Abstract
During maturation of safflower cotyledons a marked change occurred in the pattern of [ 14C] glycerol (G-OH) incorporation into the complex lipids. In the early stages of development, the G-OH-backbone of phosphatidylcholine (PC) with associated acyl-groups, is rapidly turned-over and channelled into the accumulating storage oils (triacylglycerol, TAG). In almost mature cotyledons, [ 14C]G-OH accumulated in diacylglycerol (DAG). In contrast, the germinating seed cotyledons of marrow, despite active incorporation of [ 14C]G-OH into TAG, principally synthesized PC which did not participate in oil synthesis. The role of the PC-DAG interconversion in generating polyunsaturated fatty acids, and thus affecting acyl-quality, is discussed.
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