Studies on the growth habit and control of flowering in Leucocoryne and other bulbous new crop.

白帽等球根新作物的生长习性及开花控制研究。

• 批准号: 05660028
• 负责人: OHKAWA Kiyoshi
• 金额: $ 1.34万
• 依托单位: Shizuoka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05660028/
• 关键词: Leucocoryne; New crop; Flowering control; Growth habit; Dormancy; Low temperature treatment; Chile; Bulbous plant; 新花芽; リューココリーネ; 生育・開花習性; チリ自生; ドロッパー; 花芽分化

Lcucocoryne coquimbensis is a bulbous plant which originated from Chile and is an attractive new ornamental plant. In this study, the growth habit was studied and methods to control flowering were investigated.During the time of floral anthesis and flower stems harvested in February, the vegetative and floral mcristem for the following year's inflorescense is beginning to be initiated in the bulb. When the primary (1ﾟ) floret initial appears, further development ceases in bulb. Development does not commence again until dormancy is broken, which occurs in mid to late October in Japan. At that time when the 1ﾟ floral pistil of the 1ﾟ inflorescense is completed, which takes place in late November, the carliest floret of the next inflorescense begins. Similarly, 3 to 4 inflorescense develop.Dormancy is borken by temperature between 20ﾟC and 30ﾟC in which 20ﾟC is optimum. Inflorescecse differentiation occurs at 20ﾟC and 25ﾟC.Consequently, the storage at 20ﾟC is optimum to break dormancy and to accelerate the inflorescense differentiation. In our experiment, bulbs were harvested three months after flowers had reached anthesis and were stored at 20ﾟC.Four month were required to break dormancy and for the inflorescense to start development again.Bulbs could be stored for 7 months at 20ﾟC.But the storage for 15 months was too long as the first inflorescense died. This death occurred between 8 months and 15 months. Inflorescense development had been showed at 25ﾟC when compared to 20ﾟC,and death of the inflorescense was delayd.Further, the number of days to anthesis was reduced if bulbs were stored at 5ﾟC or 10ﾟC for 2,4 or 6 weeks after dormancy had been broken and infloresacense differentiation had started.On the contrary, for L.odorota, breaking of dormancy and inflorescense differcutiation occurs at temperature between 15 and 20ﾟC.

金瓜兰（Lcucocoryne coquimbensis）是原产于智利的一种球根类植物，是一种极具吸引力的观赏新品种。在2月花茎和花期采收期间，鳞茎中的营养和花茎开始形成，为来年的花序形成提供营养和花茎。当初生（1朵）小花出现时，鳞茎中的进一步发育停止。直到休眠被打破，发育才会重新开始，这发生在日本的10月中下旬。当11月下旬第1次开花的第1朵花雌蕊完成时，下一次开花的最大小花开始。同样，开花3至4朵。休眠由20 ° C至30 ° C的温度打破，其中20 ° C为最佳。博尔肯。花序分化在20 ℃和25 ℃时发生，因此，20 ℃贮藏是打破休眠和促进花序分化的最佳温度。在我们的实验中，鳞茎在花开后3个月采收，并在20 ℃下贮藏。需要4个月才能打破休眠，花序重新开始发育。鳞茎在20 ℃下可以贮藏7个月。但贮藏15个月太长，第一个花序死亡。该死亡发生在8个月至15个月之间。与20 ℃相比，25 ℃下花序发育，花序死亡延迟。此外，如果在打破休眠并开始花序分化后，将鳞茎在5 ℃或10 ℃下储存2、4或6周，则开花天数减少。在15 ~ 20 ℃的温度范围内，休眠被打破，花序分化。