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首页> 外文期刊>HortScience >High-temperature Inhibition of Flowering of Phalaenopsis and Doritaenopsis Orchids.
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High-temperature Inhibition of Flowering of Phalaenopsis and Doritaenopsis Orchids.

机译：高温抑制蝴蝶兰和Doritaenopsis兰花的开花。

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摘要

Phalaenopsis orchids require a day temperature of 26 pC 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 1 and 2, mature potted plants were grown in separate greenhouse sections with five daily durations at 29 pC: 0, 4, 8, 12, or 24 h. The high temperature was centered in the 16-h photoperiod (0600 HR to 2200 HR) and the remainder of the day was at 20 pC. Exposure to 29 pC 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 pC 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 pC 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.
机译：蝴蝶兰兰花需要26 pC或更低的白天温度才能启动花序，而夜间温度对花序启动几乎没有影响。我们确定了每天需要的高温持续时间，以防止四个蝴蝶兰和桃金娘科克隆的花序启动。在第1年和第2年，成熟的盆栽植物在单独的温室区域中以5个每日的持续时间在29 pC下生长：0、4、8、12或24 h。高温集中在16小时的光周期（0600 HR至2200 HR）中，一天的其余时间为20 pC。暴露于29 pC 8小时或更长时间会抑制蝴蝶兰的开花起始，蝴蝶兰Miva Smartissimo x堪培拉“蝴蝶兰”和蝴蝶兰Brother Pink Mask x兄弟成功“爆炸”，但是蝴蝶兰Baldan的万花筒“金宝藏”和Doritaenopsis“ Newberry Parfait”需要暴露29 pC持续12 h或更长时间以抑制花序启动。仅在多叶蝉“ Newberry Parfait”和蝴蝶兰Baldan的万花筒“ Golden Treasure”持续高温暴露时间，而蝴蝶兰“ Mosella”持续12 h时，开花才被完全抑制。随着暴露于29 pC的持续时间增加，植物叶片的跨度通常会增加，但是高温暴露对开花植物的开花特性影响很小或没有显着影响。这些研究表明，仅短短8 h的高温就能阻止某些蝴蝶兰杂种的开花，而另一些则需要超过12 h的高温暴露。

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