垂丝海棠插穗的内源激素水平及其与扦插生根的关系  

Endogenous Hormones Levels in Cuttings of Malus halliana and Their Relations to Rooting

作　　者：许晓岗[1] 童丽丽[2] 赵九洲[3] 

机构地区：[1]南京林业大学,江苏南京210037 [2]金陵科技学院,江苏南京210001 [3]江西财经大学资源与环境管理学院,江西南昌330032

出　　处：《江西林业科技》2007年第1期20-24,共5页Jiangxi Forestry Science and Technology

基　　金：南京市科技局软科学项目(项目编号:200602050)

摘　　要：垂丝海棠扦插繁殖的试验结果表明,嫩枝扦插效果好于硬枝扦插,并且母树年龄是影响其扦插生根的重要因子。母树年龄为2年生时,生根率达77%以上。本文在此试验的基础上,对嫩枝和硬枝插穗中内源植物激素水平进行了测定。结果发现嫩枝插穗中IAA、CTKs的含量要高于硬枝插穗中IAA、CTKs的含量,并且随母树年龄的增加而降低;相反,嫩枝插穗中ABA含量要低于硬枝插穗中ABA的含量,并且随着母树年龄的增加而增加。实验结果表明:IAA、ABA的含量和扦插生根有密切关系。IAA促进生根,ABA抑制生根。IAA/ABA比值可以用来衡量垂丝海棠的生根能力。The experiment resuhs of the cuttage propagation of Malus halliana have shown that shoot cuttings root better than hardwood cuttings, and seed-tree age is an important factor which affect the rooting. Seed-tree of two years old, the rate of rooting got more than 77 %. On the basis of these experiments, this paper determined the contents of endogenous plant hormones levels in hardwood and shoot cuttings. It is shown that the contents of IAA, CTKs in shoot cuttings are higher than that in hardwood cuttings, and reduce with raising the age of seed-tree; on the other hand, the content of ABA in shoot cuttings is lower than that in hardwood cuttings, and increase with raising the age of seed tree. The results demonstrate that the contents of IAA,ABA are closely related to rooting of Malus halliana, IAA promotes rooting and ABA inhibits rooting. The experiments point out that IAA/ABA ratio maybe taken for a standard to express the capability of rooting of Malus halliana.

关 键 词：垂丝海棠 内源植物激素 生根 

分 类 号：Q322[生物学—遗传学] Q946.885