摘要
采用碘量法对4种落叶松幼苗的过氧化氢酶(CAT)动力学进行了研究。结果表明:在25%、pH7.0下,落叶松幼苗CAT活性为48.8~77.9U·g^-1FW;Km值为8.3×10^-2~2.38×10~mol·L^-1;Vmax为0.071-0.200μmol·min^-1;CAT最适温度15~25%,对温度的适应范围华北落叶松和兴安落叶松宽,长白落叶松和太白落叶松的窄;CAT最适pH值为7.0。太白落叶松对pH适应范围最窄.其可能是退化的物种。
A study on dynamics of the catalase (CAT) from the seedling of four species of larch were made by means of iodometry. The results showed that CAT activities (25℃, pH 7.0) of larch seedling is48.8 - 77.9 U· g^-1FW;Km values 8.3 ×10^-2 -2.38 ×10^-1 mol · L^-l;Vmax0.071 -0.200 μmol · min^-1 ; Optimum temperatures 15 -25℃. From adaptive range of temperature, L. principis-rupprechtii and L. gmelini are wider, L. olgensis and L. chinensis are narrower. Optimum pH 7.0. Adaptive range of L. chinensis is the narrowest, it may be degenerate species.
出处
《植物研究》
CAS
CSCD
北大核心
2006年第2期198-200,共3页
Bulletin of Botanical Research
基金
内蒙古"九五"攻关项目(No.960108)资助