Phospholipids from the mitochondrial membrane of the sweet potato, a tropical plant, were composed mainly of phosphatidylethanolamine, phosphatidylcholine, lysophosphatidylcholine and an unknown phospholipid (S4) and their approximate contents were 39, 33, 7 and 21 molar percent, respectively. Phosphatidylethanolamine began to decrease during the 4 day-chilling storage and the decrease continued up to 40% during the 14 day-chilling storage. Decreases in phosphatidyicholine, lysophosphatidylcholine and S4 were indicated for the 8 day-chilling storage and their components were lost during the 14 day-chilling storage, by 20, 10 and 20%, respectively. The amounts of these phospholipids did not seem to be changed further by prolonged chilling sotrage. Phospholipids of the mitochondrial membrane from the white potato, a temperate-zone plant, were composed mainly of phosphatidylethanolamine, phosphatidylcholine, lysophosphatidylethanolamine and an unknown phospholipid (W4), whose approximate contents were 39, 43, 3 and 15 molar percent, respectively. Amounts of these four phospholipids were not altered during the 14 day-chilling storage.
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Yamaki et al. (1972) studied this question.