High-temperature Inhibition of Flowering of Phalaenopsis and Doritaenopsis Orchids
High-temperature Inhibition of Flowering of Phalaenopsis and Doritaenopsis Orchids
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DOI：
10.21273/hortsci.44.5.1271
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发表时间：
2009-08-01
期刊：
影响因子：
1.9
通讯作者：
Runkle, Erik S.
中科院分区：
文献类型：
--
作者：
Newton, Linsey A.;Runkle, Erik S.
蝴蝶兰需要26摄氏度或更低的日间温度才能开始花序，而夜间温度对花序的开始几乎没有影响。以蝴蝶兰和Doritaenopsis为试材，测定了其花序分化所需的高温持续时间。在第一年和第二年，成熟的盆栽植物生长在单独的温室部分，每天在29摄氏度的5个持续时间：0，4，8，12，或24小时。高温集中在16小时光周期（0600 1114至2200小时），其余时间为20 ℃。暴露于29摄氏度8小时或更长时间抑制蝴蝶兰Miva Smartissimo x堪培拉'Mosella'和蝴蝶兰兄弟粉红面具x兄弟成功'爆炸'的花序启动，但蝴蝶兰Baldan的万花筒'黄金宝藏'和Doritaenopsis '纽贝里冻糕'需要暴露于29摄氏度12小时或更长时间来抑制花序启动。只有当高温持续暴露时间为纽贝里冻糕和蝴蝶兰万花筒金宝博和蝴蝶兰Mosella 12 h时，才能完全抑制开花。植物叶展一般随着暴露于29摄氏度的持续时间的增加而增加，但高温暴露对显花植物的开花特性几乎没有或没有显著影响。这些研究表明，只要8小时的高温可以防止一些蝴蝶兰杂交开花，而其他人需要超过12小时的高温。高温暴露。
Phalaenopsis orchids require a day temperature of 26 degrees C or less to initiate inflorescences, whereas the night temperature has little or no effect on inflorescence initiation. We determined the duration of high temperature required each day to prevent inflorescence initiation of four Phalaenopsis and Doritaenopsis clones. In Years I and 2, mature potted plants were grown in separate greenhouse sections with five daily durations at 29 degrees C: 0, 4, 8, 12, or 24 h. The high temperature was centered in the 16-h photoperiod (0600 1114 to 2200 HR) and the remainder of the day was at 20 degrees C. Exposure to 29 degrees C for 8 h or longer inhibited inflorescence initiation of Phalaenopsis Miva Smartissimo x Canberra 'Mosella' and Phalaenopsis Brother Pink Mask x Brother Success 'Explosion', but Phalaenopsis Baldan's Kaleidoscope 'Golden Treasure' and Doritaenopsis 'Newberry Parfait' required exposure to 29 degrees C for 12 h or longer to inhibit inflorescence initiation. Flowering was completely suppressed only when high-temperature exposure time was continual for Doritaenopsis 'Newberry Parfait' and Phalaenopsis Baldan's Kaleidoscope 'Golden Treasure' and 12 h for Phalaenopsis 'Mosella'. Plant leaf span generally increased as duration of exposure to 29 degrees C increased, but high-temperature exposure had few or no significant effects on flowering characteristics of flowering plants. These studies indicate that as few as 8 h of high temperature can prevent flowering of some Phalaenopsis hybrids, whereas others require greater than 12 h of. high-temperature exposure.