Why the mimosa shrinks and closes

Mimosa, the name sounds very attractive, can plants still be shy? What kind of plant is it? Why does mimosa shrink? Follow me to learn about mimosa!

The most important feature of mimosa is that when it is stimulated (such as touching), the leaves of mimosa will contract and come together. If the stimulus is strong, the stimulus will be quickly transmitted to the adjacent leaflets, and even to the entire compound leaflet, causing the petiole to droop. If the stimulation intensity is larger, it can even make the leaflets of the whole plant close and the compound leaves droop. But after a period of time, the original state can be restored. Mimosa also responds quickly to vibration, and begins to respond after 0.1 seconds of stimulation, which is completed in a few seconds.

Mimosa also closes the leaflets in the dark, the petiole droops, and during the day, when some of the leaflets are shaken, they close in pairs. It is more sensitive when the light is weak, and the water in the leaf pillow usually supports the leaf, but when it is stimulated by an external force, the water in the leaf pillow will immediately flow elsewhere, closing the leaves of the mimosa. In addition, it automatically contracts at night (that is, sleep exercise). This uniqueness is the source of the mimosa name and nickname.

Because of its strong vitality and messy growth, mimosa is classified as grass in many places, but in fact it will blossom. Mimosa blossoms from July to October every year, but its flowering period is so short that it dies after flowering for less than two days. The flower is pink, the head is spherical and shaped like a fluffy ball. It will also bear pods after flowering, and the fruit is flat and round.

The flower language of Mimosa is sensitive, shy and polite. Gently touching the leaves of this plant will immediately close and droop, even if a gust of wind blows, just like a shy girl, so its flower language is-shy. The person who is blessed by this kind of flower is very shy and timid, and is very afraid of life. The feeling is particularly sharp, and the self-esteem is strong.

Why is the mimosa shy?

Why does the mimosa shrink? It turns out that there is a dilated organ called "leaf pillow" at the base of the petiole of mimosa. There are many parenchyma cells in the leaf pillow, which are highly sensitive to external stimuli. Once any part of the mimosa is touched, the stimulation will be transmitted to the leaf pillow. After the leaf pillow receives the signal, the cell sap in the parenchyma cells begins to flow to the intercellular space, which reduces the expansion ability of the cells, and the pressure between the cells in the lower part of the leaf pillow decreases. As a result, the leaf closes and the petiole droops. After 1-2 minutes, the cell fluid gradually flowed back to the leaf pillow, so the leaves returned to their original appearance.

In fact, the contraction of mimosa is the physiological phenomenon of mimosa, and it is also promoted by the environment of "natural selection and survival of the fittest" in nature. Because the mimosa is produced in the tropics, where there are many strong winds and torrential rains, when the storm blows the leaflets, it immediately closes the leaves to protect them from the storm, thus gradually forming this physiological phenomenon. this is why mimosa is shy, and its technical term is called mimosa contraction.

According to the data survey, some people have studied the reasons for the contraction of mimosa, and the leaves will close within 0.08 seconds after being stimulated. After being stimulated, the conduction speed is also very fast, with a maximum speed of 10 centimeters per second. After the stimulation, after a short period of time, everything slowly returned to normal, the lobules spread out again, and the petiole stood up. The recovery time is usually 5-10 minutes. However, if we continue to tease and stimulate its leaves one after another, it will feel "bored" and will no longer react. This is because continuous stimulation causes the loss of cellular fluid in the leaf occipital cells and can not be replenished in time.

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