摘要
用3H同位素示踪方法研究了剪根稻苗移栽后叶鞘同化物的运转分配特点。结果表明,剪根处理稻苗各器官干重均低于对照,而3H-同化物的比活度却高于对照,标记后10d多数器官高出对照1倍左右,分蘖高2倍,新根高4倍。剪根处理发根节和新根的放射性总活度和3H-同化物的分配比例均高于对照,意味着其新根的发生更加依赖于主茎叶鞘物质输出。
The characteristics of dry matter accumulation and ^3H-assimilate translocation and distribution of root-pruned seedlings after transplanting were studied.The results showed that shoot dry weight of root-pruned seedling was reduced compared with untreated seedlings.However,^3H specific activity of the rootpruned seedlings was higher than that of control.After 10d of labeling,^3H-specific activity in many organs enhanced 1 times over the CK,furthermore,its tillers increased 2 times and new roots increased 4 times.The higher total ^3H activity and percentage to rooting joints and new roots mean growth of root pruned seedlings more relying on the matter exported from main stem and sheath.
出处
《核农学报》
CAS
CSCD
北大核心
2007年第4期401-403,共3页
Journal of Nuclear Agricultural Sciences
关键词
水稻
秧苗
剪根
^3H-同化物
rice（Oryza sativa）
seedling
root pruning
^3H-assimilate
