Why do mimosa leaves shrink when touched?

Because there is a large vascular bundle in the center of occipital bone, and the vascular bundle is surrounded by parenchyma, there are many intercellular spaces. When the vibration is transmitted to the occipital lobe, the cellular fluid in the parenchyma cells in the upper part of the occipital lobe is discharged into the intercellular space, which reduces the swelling pressure of the cells in the upper part of the occipital lobe, while the intercellular space in the lower part of the occipital lobe still maintains the original swelling pressure.

As a result, the small leaf stood upright, two small leaves closed, and even the whole leaf fell down. It has been studied that mimosa leaves will close within 0.08 seconds after being stimulated. After stimulation, the conduction speed is also very fast, and the highest speed reaches 10 cm per second. After the stimulation, after a while, everything slowly returned to normal, the leaflets unfolded again, and the petiole stood up.

Extended data;

Cultivation method of mimosa

1, Soil: Mimosa has strong adaptability, is not strict with soil requirements, and grows well in moist and fertile soil. It is planted in mixed culture soil made of 2 parts humus soil, 3 parts garden soil and 5 parts yellow sand.

2. Temperature: Mimosa as a potted ornamental flower should be moved to a sunny place indoors in winter, and the room temperature 10- 12℃ can safely overwinter.

3. Watering: Because Mimosa belongs to tropical plants, it loves humid environment very much, so it is necessary to keep the basin soil moist frequently. In summer, we should water the basin according to the soil conditions, about once a day. Do not let the soil dry. We can also often spray water on plants to reduce the amount of water in winter to prevent freezing injury.

4. Sunshine: Mimosa likes sunshine. Putting it in a sunny place is very beneficial to the growth of mimosa. If there is too little sunshine, it is not conducive to its growth.

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