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Absence of Lipid Oxidation during Accelerated Aging of Soybean Seeds ¹

^a Boyce Thompson Institute, Ithaca, New York 14853

When seeds of soybean were subjected to accelerated aging, the amount of total lipid which was extracted from the whole seed increased with "age," whereas the extractable phospholipid decreased slightly. This small decline primarily reflected changes in the amounts of phosphatidylcholine and phosphatidylethanolamine. The levels of unsaturated fatty acids in the whole seed and in the seed axis showed no decline during aging. Similarly, the fatty acids in a polar lipid extract from the whole seed showed little change in unsaturation. These results suggest that oxidation of seed lipids may be unrelated to the process of seed aging.