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Why Some Plants Close Leaves at Night
为什么有些植物夜间会闭合叶片
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Mimosa and prayer plants fold leaves when it gets dark.含羞草和祈祷草在天黑时会闭合叶片。
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This movement is called nyctinasty, not sleep.这种运动称为感夜性，并非睡眠。
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Plants do this to save water and protect soft tissues.植物以此来节约水分并保护柔嫩组织。
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Cells near the leaf base shrink or swell with water pressure.叶基附近的细胞通过水压收缩或膨胀。
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Light sensors in leaves detect fading sunlight.叶片中的光感受器能感知减弱的阳光。
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Hormones then signal cells to change shape slowly.激素随后缓慢向细胞发出改变形状的信号。
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It happens without nerves or muscles.这一过程无需神经或肌肉参与。
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Scientists study this to improve crop resilience.科学家研究此现象以提升作物抗逆性。