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Midway through the day, the biologists exposed the plants to a brief period of complete darkness.
生物學家在白天期間讓植物暫時陷入完全的黑暗。
What effect did this have on flowering? Absolutely none.
這會對植物開花有什么影響嗎？完全沒有。
Next, for several nights, in the middle of the night, they exposed the plants to a brief period of light.
接下來，他們連續幾個午夜讓植物接受短暫的光照。
To the biologists’ surprise, this brief interruption of the darkness inhibited flowering.
令他們吃驚的是，這短暫的光照竟然阻礙了植物開花。
Clearly it was the long period of darkness and not the short period of light that caused flowering.
很明顯，影響植物開花的是長時間的黑暗，而不是短暫的光照。
Although plants are sensitive to the nighttime part of the light-and-dark cycle, biologists and gardeners often still refer to plants as day length sensitive.
盡管植物對晝夜交替中的黑暗時段十分敏感，但是生物學家和園丁還是傾向于認為植物對晝長敏感。
For example, poinsettias are called “short-day” plants because they flower in winter.
比如，一品紅被稱為“短日照”植物是因為它在冬季綻放。
A stickler for accuracy might call poinsettias “long-night” plants, because what prompts their flowering isn’t the short days of winter, but the long nights.
一個嚴謹的人可能會將一品紅稱為“長夜”植物，因為促使它們開花的不是冬天的短暫白晝，而是冬天的漫漫長夜。
譯文為可可英語翻譯，未經授權請勿轉載!
