Nordby H E, Yelenosky G
United States Citrus and Subtropical Products Laboratory, Winter Haven, Florida 33880.
Plant Physiol. 1982 Jul;70(1):132-5. doi: 10.1104/pp.70.1.132.
Three cultivars of citrus with different sensitivities to freezing temperatures (citron, Citrus medica L.; rough lemon, C. limon Burm. F; sour orange, C. aurantium L.) were cold hardened for 4 weeks. Lipids from leaves of hardened and control seedlings were fractionated and analyzed for fatty acids. The absolute amount of triglycerides and phospholipids increased in the leaves upon hardening. With hardening, total linoleic acid also increased 141% in citron, 210% in rough lemon, and 233% in sour orange. Specific increases in linoleic acid were found in triglycerides, in the four phospholipids (phosphatidylcholine, phosphatidylethanolamine, phosphatidylinositol, phosphatidylglycerol), and in neutral lipids more polar than triglycerides. Trans-3-hexadecenoic acid was found only in phosphatidylglycerol.
对低温具有不同敏感性的三个柑橘品种（枸橼，Citrus medica L.；粗柠檬，C. limon Burm. F；酸橙，C. aurantium L.）进行了4周的抗寒锻炼。对经过抗寒锻炼和未经锻炼的幼苗叶片中的脂质进行分级分离并分析脂肪酸。抗寒锻炼后，叶片中甘油三酯和磷脂的绝对含量增加。随着抗寒锻炼，枸橼中总亚油酸增加了141%，粗柠檬中增加了210%，酸橙中增加了233%。甘油三酯、四种磷脂（磷脂酰胆碱、磷脂酰乙醇胺、磷脂酰肌醇、磷脂酰甘油）以及比甘油三酯极性更强的中性脂质中的亚油酸都有特定增加。反式-3-十六碳烯酸仅在磷脂酰甘油中被发现。
