十万个为什么·科学阅读30篇（6）
13 / 30
正在确认阅读权限…
Why Do Some Flowers Close at Night?
为什么有些花在夜晚会闭合？
-
Many flowers open in daylight and close when it gets dark.许多花朵在白天开放，天黑后闭合。
-
This movement is called nyctinasty, a type of plant response.这种运动称为感夜性，是植物的一种应激反应。
-
Plants use light sensors to detect day and night changes.植物利用光感受器感知昼夜变化。
-
Closing helps protect pollen from cold or damp nighttime air.闭合有助于保护花粉免受寒冷或潮湿的夜间空气影响。
-
It also saves energy and reduces water loss overnight.它还能节省能量，减少夜间水分流失。
-
Scientists study these rhythms to understand plant clocks better.科学家研究这些节律以更深入地了解植物生物钟。
-
Even without light, some flowers keep this daily pattern.即使没有光照，一些花朵仍保持这种昼夜节律。
-
This natural timing shows how deeply plants sense their world.这种自然计时机制体现了植物对其环境的深刻感知。