Extracellular Enzyme Activity of Sclerotia-forming and Non-Sclerotia-forming Morchella Strains

The extracellular enzyme activities of sclerotia-forming and nonsclerotia- forming single spore strains of Morchella conica and M. crasspies were determined and compared. The non sclerotia-forming strains of M. conica exhibited higher aver- age activities of protease, catalase and xylanase but lower laccase activity than those of sclerotia-forming strains. However, the differences did not reach significance level. The soluble amylases activity of M. crasspies was significantly higher than that of M. conica, while the mean activity of other enzymes had differences between them, but the differences did not reach significance level.

玉米幼苗根、茎、叶总蛋白质双向电泳方法的优化

利用改进的三氯乙酸/丙酮法对5叶期玉米根、茎、叶的总蛋白质进行双向电泳获得了高分辨率的电泳图谱。在等电点4～7范围内,根、茎、叶电泳图谱上的蛋白质点数分别为1100±89、1275±72和1327±98个。3个器官蛋白质点的分布在分子量25～75 kD和等电点5～6的范围内相对集中。通过优化样品的清洗程序结合对蛋白质在丙酮水化液中的2次沉淀能够较好地除去样品中的杂质而保证电泳质量。优化后的方法可用于玉米幼苗的根、茎、叶总蛋白质双向电泳的试验研究。