【摘要】 本文探讨了多效唑（ＰＰ３３３）、ＡＢＡ对番茄叶片衰老过程中叶绿素、可溶性蛋白质含量的影响，以及它们对正在生长的番茄叶片中超氧化物歧化酶（ＳＯＤ）、雨二醛（ＭＤＡ）含量和ＳＯＤ同工酶的影响。结果表明：多效唑能延缓番茄叶片衰老，而ＡＢＡ则促进衰老；ＡＢＡ、多效唑均能促进正在生长的番茄叶片ＳＯＤ活性上升，丙二醇含量下降，但ＳＯＤ同工酶谱没有改变。更多还原

【Abstract】 The effect of Paclobutrazol (PP333) and ABA on leaf senescence as well as the activity of SOD and content of Malondidehyde (MDA) was stUdied in this paper with tomato. The results indicated that PP333reduced the loss of chlorophyll and protein during aging, PP,,, and ABA increased the SOD activity and MDA content of tomato growing leavhs. Isozyme spectra of SOD were different.更多还原