John J B
Agricultural Environment Quality Institute, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland 20705.
Plant Physiol. 1976 Jan;57(1):38-40. doi: 10.1104/pp.57.1.38.
The fatty acid composition of the major lipids of the chloroplast membranes, the mono- and digalactosyl diglycerides, can be definably altered with various substituted pyridazinones. Galactolipid fatty acid composition of wheat (Triticum aestivum L.) can be altered so that there is a decrease in linolenic acid accompanied by an increase in linoleic acid without a shift in the relative proportion of saturated to unsaturated fatty acids; the fatty acid composition can be shifted toward a higher proportion of saturated fatty acids; or the fatty acid composition of the monogalactosyl diglycerides can be altered in preference to the digalactosyl diglycerides. Also, the light-mediated parallel accumulation of chlorophyll and linolenic acid can be separated with a substituted pyridazinone. The substituted pyridazinones may be useful tools in clarifying the role the galactolipids and their component fatty acids play in the structure and function of chloroplast membranes in higher plants.
叶绿体膜的主要脂质，即单半乳糖基二甘油酯和双半乳糖基二甘油酯的脂肪酸组成，可以通过各种取代哒嗪酮进行明确改变。小麦（Triticum aestivum L.）的半乳糖脂脂肪酸组成可以发生改变，使得亚麻酸减少，同时亚油酸增加，而饱和脂肪酸与不饱和脂肪酸的相对比例不变；脂肪酸组成可以向更高比例的饱和脂肪酸转变；或者单半乳糖基二甘油酯的脂肪酸组成优先于双半乳糖基二甘油酯发生改变。此外，取代哒嗪酮可以分离叶绿素和亚麻酸的光介导平行积累。取代哒嗪酮可能是阐明半乳糖脂及其组成脂肪酸在高等植物叶绿体膜的结构和功能中所起作用的有用工具。
