烯效唑干拌种对小麦叶片衰老期间有关酶活性的影响

研究不同浓度(0、10、20、40mg·kg-1)烯效唑干拌种对小麦品种川麦30不同叶序(3叶、7叶、旗叶)叶片衰老期间酶活性影响的结果表明,烯效唑干拌种后,不同叶序叶片超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、抗坏血酸过氧化物酶(APX)活性增强,衰老后期仍维持较高水平;而核糖核酸酶(RNase)活性水平及上升速率则受抑,叶片中丙二醛(MDA)积累量减少,可溶性蛋白质含量下降缓慢.

Effects of Uniconazole Waterless-dressing Seeds on Enzyme Activities During Leaf Senescence of Wheat

The effects of S-3307(uniconazole) waterless-dressing seeds with different concentrations (0,10,20, 40 mgkg-1) on the activities of some enzymes related to leaf (3rd leaf, 7th leaf and flag leaf) senescence ofwheat cv. Chuanmai 30 were studied. The results showed that: S-3307 treatment increased the activities ofsuperoxide dismutase(SOD), catalase(CAT), ascorbate peroxidase(APX) and decreased the activity of RNaseduring leaf senescence; At the same time, the leaves treated by S-3307 had higher soluble protein content andlower MDA content during leaf senescence. Therefore, it was suggested that the action of S-3307 on delayingsenescence of wheat leaves was correlated with the increasing activities of active oxygen scavenging system,and the decreasing activity of RNase.