摘 要 ：为了获得分离效果好、清晰度高的杨树叶片蛋白质双向电泳图像,本研究以小黑杨、毛果杨和84K杨叶片为材料,采用三氯乙酸-丙酮沉淀法、Tris-饱和酚法和Tris-三氯乙酸法提取杨树叶片总蛋白质,分别采用聚丙烯酰胺凝胶电泳和双向凝胶电泳对蛋白质进行分离,应用Image Master 2DP latinum 6.0软件对这3种蛋白质提取方法得到的双向电泳凝胶进行分析。结果表明:Tris-三氯乙酸法最适用于双向电泳的杨树叶片蛋白质的提取。利用Tris-三氯乙酸法提取蛋白质得到的鲜样中总蛋白质平均含量为949.46μg·g-1,得到的蛋白质点平均数量为567个,所得到的双向电泳凝胶图谱分离效果好、清晰度高。
Abstract:In order to obtain the two-dimensional gel electrophoresis images with better separation and definition of poplar leaves, the Populus X, P.trichocarpa Torr. & Gray and P.alba×P.glandulosa were selected to study the optional extracting methods of poplar leaves for two-dimensional gel electrophoresis by using TCA/acetone precipitation, Tris/saturated phenol and Tris/TCA method, respectively. The proteins of poplar leaves were separated by SDS-polyacrylamide gel electrophoresis and two-dimensional gel electrophoresis respectively and the images of two-dimensional gel electrophoresis were analyzed by Image Master 2D Platinum 6.0. Tris/TCA method was more appropriate for the protein extraction of poplar leaves for two-dimensional gel electrophoresis. The average protein content of the fresh sample extracted by Tris/TCA method was 949.46 μg·g-1 and the average quantity of protein spots was 567 in the two-dimensional gel electrophoresis images which had better separation and definition.