摘要
转移光周期试验结果表明,谷子的光周期敏感性主要分布于茎尖分化以前。植物生长早期叶片酯酶同工酶的变化被短日照提早,而被不断光照推迟。酶带变化可能涉及幼年植物分化状态的改变。不断光照引起植物早期奋发生叶层次内α-淀粉酶活性逐渐下降,6叶期下跌到最低值,以后再度回升。而这一酶活性水平的V型波动被短日照条件所阻止。植物叶内游离抗坏血酸含量和过氧化物酶活性水平表现在生长发育水平上的起伏变化,并都在6叶期极度下降。而短日照下6叶期也正值植物茎尖伸长。
The result of the experiment in switching photoperiods shows that photoperiod-sensitivity of millet plants spreads out chiefly before the differentiation of the shoot apex. A shift in leaf esterase isoenzymes during the early growth period is advanced by SD (8h) treatments, and delayed by LD (Cont Illum) treatments. The shift in isoenzyme may involve a change in differentiation-stage of young plants. LD treatments result in a gradual decrease of α-amylase activities in the early successive leaf layers of newly expanded. The α-amylase activity reaches its minimum at 6 leaf-stage, and thereafter appears to increase. But SD treatments can prevent the α-amylase activity level from the V patternfluctuation. Both the content of free ascorbic acid and the peroxidase activity in leaves show a fluctuation accopanying plant growth, and reach their minimum at 6 leaf-stage. Under SD (8h) the 6 leaf-stage coincides with the onset of elongation of shoot apex.
出处
《武汉植物学研究》
CSCD
1989年第2期167-172,共6页
Journal of Wuhan Botanical Research
关键词
光周期
酯酶同工酶
生理特性
谷子
Photoperiod
Esterase isoenzyme
α-Amalase activity
Peroxidase activity
Content of ascorbic acid
