Last year, my mother bought a basin of Mimosa, which grows very luxuriantly. I like it very much, and I think his name is very interesting, like me. I would like to know how it is afraid of shame. Once, I gently touched its leaves. As a result, its leaves closed immediately. I was very curious, so I touched other leaves with my hands. The same thing happened. I went to one side and didn't move it any more. After a while, I didn't expect that its leaves were slowly unfolding. What's more, I also found that its leaves close when it's rainy and windy.
"Why do the leaves of Mimosa close?" "Why does it close on rainy days and strong winds?" "Is it as shy as a human being?" I couldn't think of the answer. I went to ask my mother with questions. My mother said, "you can find the answer yourself." I went to check the information for a long time, and finally found out the reason: the leaves and petioles of Mimosa contain a lot of water. When you touch it with your hand, the water on the leaves flows to other places, so the leaves curl up. On the contrary, when the petiole is touched by hand, the water flows far below, and the whole leaf droops. Its leaves droop in rainy days and strong winds, which is its way to protect itself from being broken by storms. At this time, I suddenly realized that Mimosa is not really shy! I feel very excited at this time, because I have picked a little flower in the garden of science and a little fish in the ocean of knowledge. I will never forget this.
There are many mysteries of nature in the world waiting for us to uncover. I will study hard, grow up and explore more mysteries of nature. I found the secret of Mimosa. I like Mimosa very much. I like the way it looks when it's' shy ', but I don't understand why it's' shy'. Now I have finally discovered the secret of why Mimosa is so shy!
I remember it was a summer vacation when I was walking alone in the park. Just as I was leaving the park, I saw a kind of grass that I had never seen before. I went over with curiosity and touched its leaves with my fingers. Suddenly, its leaves all closed. I wonder why the leaves close when I touch it. With this question in mind, I opened the "100000 whys". It turns out that the phenomenon of leaf closure and petiole drooping of Mimosa is not 'Mimosa', but a response of plants to stimulation and vibration. This kind of reaction is called perceptual movement in biology. It is the result of cell tension change after Mimosa is stimulated by the outside world.
I understand: originally, as long as you carefully observe, you can find their secret!
On the fourth floor of Chenjiang primary school, Zhongkai high tech Zone, Huizhou City, Guangdong Province, I discovered the secret of Mimosa. On the balcony on the second floor of my home, there is a little shy girl, Mimosa.
It's tender green and has very small leaves. Its stem is 70 cm long. The stem is thicker than a chopstick, and there are seven or eight branches on the stem.
I couldn't help stroking the mimosa. Unexpectedly, the leaves of the Mimosa immediately closed, and even the petiole dropped down. After a while, its leaves opened again, and the petiole also stood up.
I found hanchai grass. In the evening, it leaves again, just like a flower fairy sleeping in it. Early in the morning, its leaves opened again, as if waking up. composition
Mimosa flower is like a pinecone, its flower is pink, like a pink marshmallow. The fluffy flowers are very beautiful with gold powder and lace.
There are many small thorns on the stem of Mimosa. Its petioles are scarlet. composition
Why are Mimosa shy?
I ran to check the information, it turned out that the origin of Mimosa is Brazil in South America. Gen said it rained every day. If Mimosa can't close its leaves in time when it rains, it will be hurt by the heavy rain. Therefore, as long as the Mimosa meets the raindrop, it immediately closes the leaves to protect itself.
I finally know the secret of Mimosa.
This article by Lai Wenjing, grade 4 of Wanjiang No.1 Primary School, is an original article by users of this website. It is forbidden to reprint without permission! Secret of Mimosa on Sunday, my mother brought me a new friend --- a pot of Mimosa from the flower market. 'ah! What a beautiful flower! 'I couldn't help crying. Pink leaves are particularly beautiful against the backdrop of green fluff.
I put it on the balcony. This Mimosa is shining green in the sunshine. When I look at it carefully, each leaf is made up of many small leaves, just like a bird's feather; the small leaves are opposite each other, on both sides of the petiole, just like many pairs of close friends. I said hello to this' extraterrestrial 'and accidentally met it. I suddenly found that its leaves were magically closed. This time, as if I'm ashamed to touch it. I wonder: why does Mimosa move? Can Mimosa have motor nerve just like us?
I asked my father for advice, but my father was not very clear, so I went to the Internet to look up the relevant information. oh It turns out that there is a bulging bag under the petiole of Mimosa, called 'leaf pillow', which contains plenty of water and has a keen sense. When you touch its leaves with your hand, the water in the pillow will flow to both sides immediately, and the pillow will shrivel and hang down. I suddenly understood the secret of Mimosa.
Today, I'm so happy! Because I can read so much knowledge from plants. How wonderful the kingdom of plants is! As long as we are good at research and diligent in research, there will be more discoveries waiting for you. This Sunday, my grandfather and I went to the flower and bird market. I bought a beautiful Mimosa when I got home.
Its leaves are green, small, like the feathers of a bird. I can't help touching its small leaves, it slowly closed. I was curious to continue to touch its leaves, it seems to droop head, fell asleep, never pay attention to me. Suddenly, a big question mark appeared in front of me. Why does a mimosa close when it touches its leaves?
So, I went to ask my grandfather. After he said that, I still didn't understand, so I went to the Internet to look up information. It said that Mimosa is not shy, it is to protect itself, so I closed the leaves. Originally its hometown in Brazil, where often under showers or thunderstorms, Mimosa in order to protect themselves, just close the leaves.
In addition, I also found that the faster you touch its leaves, the faster it closes. The slower you touch its leaves, the slower it closes. composition
After I discovered the secret, I was very happy, and I wanted to let people all over the world know the secret. Secrets of Mimosa my grandfather and I went to the flower and bird market this Sunday. I bought a beautiful Mimosa when I got home.
Its leaves are green, small, like the feathers of a bird. I can't help touching its small leaves, it slowly closed. I was curious to continue to touch its leaves, it seems to droop head, fell asleep, never pay attention to me. Suddenly, a big question mark appeared in front of me. Why does a mimosa close when it touches its leaves?
So, I went to ask my grandfather. After he said that, I still didn't understand, so I went to the Internet to look up information. It said that Mimosa is not shy, it is to protect itself, so I closed the leaves. Originally its hometown in Brazil, where often under showers or thunderstorms, Mimosa in order to protect themselves, just close the leaves.
In addition, I also found that the faster you touch its leaves, the faster it closes. The slower you touch its leaves, the slower it closes. composition
After I discovered the secret, I was very happy, and I wanted to let people all over the world know the secret. Secrets of Mimosa have you ever seen Mimosa? If you touch it gently, its open pinnate compound leaf will immediately close, and then the whole leaf will fall down again, showing the appearance of "shyness", hence the name of Mimosa.
The phenomenon of leaf closing and petiole drooping of Mimosa is not "shy", but a response of plants to stimulation and vibration. This kind of reaction is called perceptual movement in biology, which is the result of cell tension change after Mimosa is stimulated by the outside world.
It turns out that the leaves and petioles of Mimosa have special structures. At the base of petiole and leaflet of compound leaf, there is a relatively enlarged part, which is called leaf pillow. The occipital lobe is most sensitive to stimulation. Once touching a leaf, the stimulation immediately spreads to the pillow at the base of the petiole, causing the two leaflets to close, and the contact force is greater. It not only spreads to the pillow at the base of the petiole, but also quickly spreads to the pillow at the base of the petiole, and the whole petiole droops. Why is that? This is because there is a large vascular bundle in the center of the occipital, which is surrounded by parenchyma with many intercellular spaces. When the vibration is transmitted to the occipital, the cell fluid in the parenchyma cells of the upper part of the occipital is discharged into the intercellular space, so that the turgor pressure of the upper part of the occipital is reduced, while the original turgor pressure of the lower part of the occipital parenchyma cells is still maintained. As a result, the leaflets stand upright, the two leaflets close, and even the whole leaf droops. The leaves of Mimosa will close within 0.08 seconds after being stimulated. After stimulation, the conduction speed is also very fast, with the highest speed of 10 cm per second. After stimulation, after a period of time, everything slowly returned to normal, the leaflet expanded again, and the petiole also stood up. The recovery time is generally 5-10 minutes. However, if we continue to tease and stimulate its leaves, it will feel "bored" and no longer have any reaction. This is because continuous stimulation makes the cell fluid in the occipital cells lose and cannot be replenished in time.
This 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 hit the leaves, it immediately closed the leaves and drooped the petioles to avoid the damage of the storm. This is an adaptation to the changes of the external environment. In addition, the movement of Mimosa can also be seen as a way of self-defense. Once animals touch it, it will close the leaves, and animals will not dare to eat it. composition
Mimosa belongs to the subfamily Mimosa of Leguminosae. It is a kind of perennial semi shrubby herb in origin. Wild plants are found in Guangdong, Taiwan, Fujian, Guangxi, Yunnan and other provinces in southern China, and are often cultivated in northern and central China. Some plants are upright, and others can grow to about 30 meters in height. Autumn, out of a light red flowers, like a little red ball, very lovely
Mimosa is also known as Mimosa, ticklish flower and fearless grass. It is a leguminous herb with alternate leaves and bipinnate compound leaves. composition
Later, my father also told me that Mimosa is common on roadsides