Apex size as an index of juvenility in ornamental perennials

顶端大小作为观赏多年生植物幼年性的指标

• 批准号: 08660040
• 负责人: DOI Motoaki
• 金额: $ 1.41万
• 依托单位: Osaka Prefecture University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08660040/
• 关键词: juvenility; ripeness to flower; ornamental perennials; apex size; freesia; Dutch iris; chilling sensitivity; エチレン処理

Relationship between sensitivity to chilling for flower bud initiation in freesia and Dutch iris and their morphological characteristics, such as bulb and corm weight, leaf number and apex size, was investigated to identify the phasic transition from juvenile to adult in apical meristems.Apex of freesia corms enlarged gradually after releasing from dormancy and reached 0.19-0.20 mm in diameter, which is an reliable index of phasic transition from juvenile to adult in apical meristems, resulting in obtaining high sensitivity to chilling. Apex size of the upper buds on freesia corms was larger than that of basal ones and showed higher sensitivity to chilling. These data indicate that the phasic transition does not occur in individual plants but in individual axis.In Dutch iris, phasic change from juvenile to adult was not accompanied by any morphological change. While, application of ethylene to bulbs at the concentration of 50-100ppm promoted the phasic change immediately after the treatment and increase the sensitivity to chilling, though no morphological change was brought by the treatment with ethylene, indicating that physiological phasic change occurs without any morphological changes in Dutch iris.

研究了小苍兰和荷兰鸢尾花芽分化对低温的敏感性与鳞茎和球茎重、叶片数、顶端大小等形态特征的关系，以确定小苍兰和荷兰鸢尾顶端分生组织由幼年期向成年期的转变过程，小苍兰的球茎顶端在解除休眠后逐渐增大，直径达0.19-0.20 mm，这是顶端分生组织从幼年到成年阶段转变的可靠指标，导致获得对冷的高敏感性。小苍兰球茎上部芽的顶端比基部芽大，对低温的敏感性较高。这些数据表明，阶段性的转变并不发生在个别植物，但在个别轴。荷兰鸢尾，阶段性的变化，从少年到成年人没有伴随着任何形态变化。而50- 100 ppm乙烯处理后，虽然没有引起形态学上的变化，但促进了处理后即刻的阶段性变化，增加了荷兰鸢尾对低温的敏感性，表明荷兰鸢尾发生了生理阶段性变化，但形态学上没有任何变化。

项目成果

Imamura, Y., M.Doi and H.Imanishi: "Difference in Dormancy release and flowering responses to chilling in freesia corms and cormlets" J.Japan.Soc.Hort.Sci.65 (1). 121-127 (1996)

Imamura, Y.、M.Doi 和 H.Imanishi：“小苍兰球茎和小球茎休眠释放和开花对寒冷的反应的差异”J.Japan.Soc.Hort.Sci.65 (1)。

馬庭一弘・土井元章・今村有里・今西英雄: "抑制栽培に用いるフリージア木子の貯蔵法の改善" 園芸学会雑誌. 65別1. (1997)

Kazuhiro Maniwa、Motoaki Doi、Yuri Imamura 和 Hideo Imanishi：“用于控制栽培的小苍兰树储存方法的改进”，日本园艺学会杂志，第 65 期，第 1 部分（1997 年）。

今村有里・土井元章・今西英雄: "フリージアの球茎と木子における休眠解除および花芽形成に対する低温感応性の差異" 園芸学会雑誌. 65. 121-127 (1996)

Yuri Imamura、Motoaki Doi 和 Hideo Imanishi：“小苍兰球茎和木纹对休眠释放和花芽形成的低温敏感性的差异”日本园艺学会杂志 65. 121-127 (1996)。