三唑酮对离体水稻叶片衰老的延缓作用

用质量浓度为２０ｍｇ／Ｌ的三唑酮溶液处理提高叶片的蛋白质含量和叶绿素含量,表明三有延缓水稻叶片的衰老。叶片衰老过程中,超氧化物歧化酶（ＳＯＤ）、过氧化氢酶（ＣＡＴ）活性和抗坏到（ＡｓＡ）、还原型谷光甘肽（ＧＳＨ）含量降低,三唑酮处理抑制了它们的降低。过氧化物酶（ＰＯＤ）活性的丙二醛（ＭＤＡ）含量提高,三唑酮处理抑制它们的提高。结果表明,三唑酮提高叶片膜脂过氧化作用的保护能力是其延缓衰老的原因。

Retardation of Senescence by Tridadimefon in Detached Rice Leaves

The contents of soluble proteins and chlorophyll of the detached leaves of rice treated by triadimefon(mass concentration=20 mg/L) increased. The results indicated that triadimefon retarded the senescence of rice leaves. During the senescence of detached rice leaves, both the activities of superoxide dismutase and catalase and the contents of ascorbic acid and reduced gluthione decreased, which was inhibited by triadimefon. These results suggested that triadimefon enhanced the protective ability against enhanced lipid peroxidation.