摘要
1986年以“南无563”、“早熟农垦58”、“浙场9号”、“盐籼203”为供试品种,进行了再生蘖光照处理试验;1987年对“澄秋5号”品种进行了短日照处理及两段抽穗试验,其试验结果为:a.再生蘖光照处理试验探明,主茎(或母茎)可以于抽穗至成熟阶段将光周期诱导质变传导给地上部伸长节芽;但不能够传导给未伸长节的腋芽或分蘖,传导的迟早因品种而异。b.“澄秋5号”品种在短日处理下分蘖生育期很短,可能是由于其感受光周期诱导的起始叶龄小、穗分化历程短的缘故,并非茎蘖间光周期诱导质变的传导所致,该品种的两段抽穗现象是其茎蘖间光周期诱导质变不能传导的一个重要佐证。
To study translocation of photoinductive effects between the mainculm and its tillers of rice , experiments of photoperiodic treatments onfour Varieties' ratooning tillers and short-day treatments on 'Chenqiu 5 'were conducted in Changsha from 1986 to 1987, resulting in the follwing find-ings: a. Photoinductive effects are able to translocate from main culm(or motherculm) to its tillers developed from elongate nodes after main culm heads, butnot from main culm to its tillers developed from tillering nodes. The translo-cation time varies with varieties. b. The short tillering duration of 'Chenqiu5' under short-day treatments may be due to its young starting leaf age ofphotoinduction and short initiation duration of panicle, not the translocationof photoinductive effects between main culm and its tillers. The heading of'Chenqiu 5' at two-separate-times indicates that the photoinductive effectscan't translocate between main culm and its tillers. However, this needs fur-ther study.
关键词
水稻
光周期
光诱导
突变
节
lowland rice
photoperiod
light-induction
abrupt change
node
