In a sense, all plants sleep, when the sun goes down, and there is no light.

Photosynthesis cannot take place when it is dark, and the plants cannot make food. They close down the stomata, and only respiration continues.

Some species of Cala thea, Ctenanthe and especially Maranta, fold their leaves, or roll their leaves up at night.

Plants don’t have a central nervous system, which is an essential regulator of sleep in humans. But they do tune themselves to a 24-hour circadian rhythm, just like you. … During the day, they soak up the sun in order to make energy through photosynthesis, a plant’s version of eating.

So, because of respiration, oxygen is utilised and carbon dioxide is continuously produced. … That is, the plants leave carbon dioxide at night. On the basis of this it is that in the night if you sleep under the tree, you will not get oxygen, which can cause breathing problem, suffocation etc.

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