Will mimosa, which closes immediately when touched by external forces, blossom and bear seeds in summer?

Mimosa is a perennial herb or subshrub of Leguminosae. It is named because its leaves respond to heat and light and close immediately when touched by external forces. Will such a petite mimosa blossom and bear seeds in summer? According to Ms. Li, a flower shop manager in Changsha, mimosa blossoms at the height of summer and is usually in full bloom from July to October in the Gregorian calendar. In the green grass, light purple and pink flowers, furry, appear particularly shy, slender branches and leaves, make the plump and round flowers more charming and bright. After flowering, mimosa will bear pods in autumn, with seeds in it, and fall off between periods when it matures.

Why the mimosa is put away when it touches the leaves

If the leaves of mimosa are touched, they will close immediately. The more powerful they are, the faster they close, and the whole leaves will hang down as if they are weak, and the whole action will be completed in a few seconds. The leaves and petioles of mimosa have a special structure. At the base of the petiole and at the base of the leaflet of the compound leaf, there is a relatively inflated part called the leaf pillow. The leaf pillow is the most sensitive to stimuli. As soon as it touches the leaf, the stimulus immediately spreads to the pillow at the base of the petiole, causing the two small leaves to close, with a greater kinetic force, not only to the pillow of the leaflet, but also quickly to the pillow at the base of the petiole, and the whole petiole droops. What causes it? This is because there is a large vascular bundle in the center of the leaf occipital, which is surrounded by parenchyma with many intercellular spaces. When the vibration reaches the leaf pillow, the cell fluid from the parenchyma cells in the upper half of the leaf pillow is discharged into the intercellular space, which reduces the turgor pressure of the cells in the upper part of the leaf pillow, while the parenchyma cell space in the lower part still maintains the original turgor pressure. as a result, the leaflets stand upright and the two leaflets close, even the whole leaf hangs down. It has been studied that mimosa leaves 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.

The special ability of mimosa has its historical roots. Its hometown is in Brazil in tropical South America, where there are often strong winds and heavy rain. Whenever the first drop of rain hits the leaf, the leaf immediately closes and the petiole droops to avoid the damage caused by the storm. This is a kind of adaptation to the change of external environmental conditions. In addition, the exercise of mimosa can also be seen as a way of self-defense. When an animal touches it, it closes its leaves, and animals dare not eat it any more.

Annex 2: why are humans shy?

Shyness is actually a kind of fear. Worrying that your shortcomings will be exposed to the sun will make others look down on you. So I don't dare to express myself. The more you express yourself, the more scared you feel. Ordinary people are also afraid. Shy people are mentally sensitive and overly afraid. Will feel blushing, heartbeat and other normal reactions.