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Why does the mimosa shrink?

Posted on May 18, 2022

1, principle

The base of the leaflet containing the mimosa has a unique organ called “leafrest”, and there are many thin-walled cells in the pillow, these thin-walled cells and their sensitive, slightly vibration or stimulation of the outside. .

2, physiological response

When the leaves are touched, the cell fluid in thin-walled cells will gradually move into the gap of the cells, which greatly reduces the expansion of the cells, so that the thin-walled cell pressure of the end of the leaf stopper is small, and the blade is closed. The phenomenon of drooping the petiole.

With the continuous growth of the mimosa, the blades will grow closer, especially in silent nights, mimosa’s small leaves, and the petiole is gradually sag.

The shake of external force during the day will also close. When the mimosa is weak, the moisture supporting the water in the leafrest is subjected to an external force, and the position of the blade will cause the blade closure. This phenomenon will remain in less than two minutes, and the cell fluid returns to the leafrest, and the blade gradually restores the original state.

In addition, the mimosa will quickly shrink the leaves before receiving the dramatic shock, and then suddenly withered, using this feature we can use mimosa to predict the earthquake. Xiaobian’s contraction of mimosa has been explained, I don’t know if the flowers have some understanding?

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