Unlike animals, plants have no nervous system and muscles, and will not perceive external stimuli. Different from ordinary plants, mimosa will lower its petiole and close its small leaves when it is touched by the outside world, which is understood as "shyness".

Mimosa cells are supported by tiny reticulin actin. When the closing movement occurs, the phosphate of actin will fall off. As long as the mimosa is allowed to absorb the compound that prevents the phosphoric acid from falling off, it will not change when touched.

When the actin bundle is dispersed, the cells are destroyed, and as a result, water runs out, leading to closed movement. Actin generally exists in animal muscle fibers and is related to muscle contraction. It is also found in mimosa, which is quite rare.

Extended data:

Mimosa is a magical plant, which can predict the weather changes. If you touch it with your hand, its leaves will close quickly and open slowly, which means the weather will clear up;

If you touch the mimosa, its leaves will shrink slowly, droop slowly, and even open again after a little closing, which indicates that the weather will turn from sunny to cloudy or it will rain soon.

Mimosa can also predict disastrous weather changes, and it will produce unconventional growth activities for sudden anti-seasonal temperature difference, geomagnetic and geoelectric changes.

References:

Baidu encyclopedia-mimosa