1. The reason why Mimosa closes when touched

Mimosa closes as soon as it touches, not because it's really shy. It's just a vivid metaphor. In fact, closing the leaves when stimulated by the outside world is a way for it to protect itself, because the growth environment of its origin is very bad, so it can only protect itself in this way. How can Mimosa protect itself? The secret is mainly on the petiole of Mimosa

There is a special organ called "leaf pillow" on the petiole of Mimosa. There are many parenchyma cells growing in the leaf pillow. These cells themselves are very sensitive. As long as they are slightly stimulated by external vibration or touch, they will begin to have a closed response

Another is the physiological response of Mimosa itself. When its leaves are touched, the cell fluid contained in the parenchyma cells in the leaf pillow will flow to other places, reducing the expansion of cells. In this way, the pressure of parenchyma cells will be reduced, followed by the phenomenon of tight leaves and drooping petioles

In addition, when the external light is relatively weak, the water supporting the expansion of the leaves in the Mimosa leaf pillow will flow to the gaps on both sides under the action of external force, which will also lead to the phenomenon of leaf closure. But this phenomenon will not last long. It will recover in about two minutes

2. Will Mimosa close at night

Mimosa leaves close at night. Because there is no light at night, Mimosa needs to be at the right temperature to stretch its leaves and carry out photosynthesis in the sun. However, the temperature is relatively low at night and photosynthesis cannot be carried out. In order to keep warm, the leaves of Mimosa will close at night