Medium chain-length fatty acids in lipids of developing oil palm kernel endosperm
1995
Wiberg, E. | Bafor, M.
The content and acyl quality of triacylglycerol (TAG), diacylglycerol (DAG) and phosphatidylcholine (PC) in developing palm kernels (Elaeis guineensis) endosperm were determined between 8-20 weeks after anthesis (WAA). Rapid accumulation of TAG (ca 65 micromoles per kernel per week) started at 13 WAA and continued until 17 WAA. Accumulation of DAG followed a similar pattern to TAG but was two orders of magnitude less in quantity. The content of the major phospholipid, PC, was more or less constant from 8 to 17 WAA. The levels of medium chain-length fatty acids were very low in all lipid classes at 8 WAA. There was a rapid increase in the relative amounts of 12:0 and 14:0 in TAG between 8 and 12 WAA, after which their proportions remained fairly constant throughout kernel development. The content of 12:0 and 14:0 in PC and DAG increased up to 13 WAA, after which there was a substantial decrease. The decrease in the proportions of 12:0 and 14:0 in DAG and PC coincided with the onset of the rapid TAG synthesis. The results are discussed in terms of the regulation of oil biosynthesis in tissues accumulating medium chain-length fatty acids.
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