用α一奈酯（α一ＮＡ）和β一奈酯（β一ＮＡ）配制成混合底物，采用偶氮色素法测定油菜不同器官或部位的酯酶总活力，同时测定其蛋白质含量。分析比较油菜不同器官或部位的酯酶总活力和酯酶比活力，结果表明，生理活动较旺盛或与生殖有关的器官或部位的酯酶总活力和酯酶比活力也高。因此推测植物酯酶与植株的生殖生长有着密切联系。 The α-NAA (α-NA) and β-Nalidipine (β-NA) were used as a mixed substrate to determine the total esterase activity of different organs or parts of rapeseed by azo dye method, and the protein content was also determined. The total esterase activity and esterase specific activity of different organs or parts of rape were analyzed and compared. The results showed that the total esterase activity and esterase specific activity of organs or parts related to vigor or reproduction were also high. Therefore speculated that plant esterase and plant reproductive growth are closely linked.