【摘要】 探讨了氮素形态对烤烟成熟过程中抗坏血酸-谷胱甘肽循环系统的影响。结果表明,烟叶自移栽后60 d开始,抗坏血酸过氧化物酶(APX)活性和抗坏血酸(ASA)含量逐渐上升,到70~80 d达到最高峰,随后稳定在一定的水平。3种不同氮素形态处理的APX活性和ASA含量变化规律相似,均随着硝态氮比例的增加而增大;谷胱甘肽还原酶(GR)活性在移栽后90 d达最大值,此后逐渐下降,谷胱甘肽(GSH)含量随着烟叶的成熟持续下降。烟叶成熟过程中各处理GR活性和GSH含量随着铵态氮比例的增加而增大。更多还原

【Abstract】 The effects of nitrogen formation on the ascorbic acid(ASA)-glutathione(GSH) recycle system during the maturity of flue-cured tobacco were studied.The results showed that the activity of APX and the content of ASA increased gradually from the plant was cultivated 60 d later,and reached acme during 70-80 d,then tended to stability.The change of the activity of APX was similar with the content of ASA during each treatment,which added with the increasing of the proportion of nitrogen N;the activity of GR reached peak when the plant was cultivated 90d later,then lowered,the content of GSH decreased all the time with the increasing maturity of tobacco leaf.The change of the activity of APX was similar with the content of ASA during each treatment,which added with the increasing of the proportion of ammonium N.更多还原