The Contents of Conjugated Lipids and Fatty Acids and the Cold Tolerance in the Mitochondria of Starking Delicious and Rails Janet Apples

概要

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The mitochondria were prepared from apples cv. Starking Delicious which were sensitive to chilling injury and apples cv. Rails Janet which were not sensitive to chilling injury. The content of unsaturated fatty acids in the Rails Janet mitochondria was higher than that in the Starking Delicious mitochondria. Phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylinositol, phosphatidic acid, phosphatidylserine, diphosphatidylglycerol (cardiolipin) and mono- and digalactosyldiglyceride were identified as the conjugated lipid components. The PC/PE ratios were 0.74 and 0.14, respectively, in the mitochondrial phospholipid fraction of Rails Janet and Starking Delicious apples. The higher ratio of PC/PE and unsaturated fatty acid contents in Rails Janet than those in Starking Delicious may cause the resistance to chilling injury in Rails Janet by playing a role in lowering of the phase transition temperature. These facts were thought to contribute largely to the flexibility, fluidity and the function of transport of the membranes in the cold state.
社団法人日本農芸化学会の論文