Mimosa Observation Diary 1

While eating dinner, my mother said to me mysteriously: Eat quickly. After eating, my mother will let you watch something interesting. I quickly finished the rice in the bowl and urged my mother to take out the things.

My mother took me to the yard, turned on the lights in the yard, pointed to a small pot of plants on the ground and said: That's it. I followed my mother's fingers and saw a pot of green plants on the ground. The leaves were a bit like the leaves of a locust tree, but smaller and narrower. I couldn't see anything strange about it. Mom said, touch it with your fingers. I squatted down and stretched out my fingers to touch its leaves. As soon as my fingers touched it, its leaves immediately closed, like an automatic switch. I tried touching other branches and leaves, and they all looked like this. I remembered, it was mimosa. I had only read about it in books before, never in real life. I asked my mother if it was a mimosa. My mother smiled and said: You guessed it right, but do you know why the leaves of the mimosa close when touched? I shook my head, and my mother asked again: Do you want to know? I said: Of course I do. Mom said again: "But Mom doesn't know either. Why don't we go and see what the book says." I immediately ran into the house, found "One Hundred Thousand Whys", turned to the Mimosa page, and read it seriously. It turns out that there is a kind of cell tissue called leaf mattress growing in the leaves of Mimosa. It is full of water. As long as it is shaken, the water in the leaf mattress will flow downward and to the edges. In this way, the bottom of the leaf mattress will lose water. , it will deflate, but the top will bulge because it is filled with water. Then the whole leaf closed and folded. The formation of this characteristic of Mimosa is because its hometown is in Brazil, where there are often violent storms. Because of this ability, Mimosa can survive in the storm. Seeing this, I have a new understanding of this little plant.

When I had nothing to do, I went to play with the mimosa and watched its leaves open and close, and open and close again. It was really interesting. Nature is so mysterious! Mimosa Observation Diary 2

Mimosa has finally bloomed. The flowers are beautiful and lovely. It is red like a little girl dancing; it is also like a lamp guiding us in the darkness.

It is even more dazzling against the leaves. The small yellow dots on its body may be nectar, which is very beautiful, or it may be small bullets, or it may be small yellow lights. It is like a fluffy ball of thread, red, as bright as the sun, and as radiant. The stamens growing on the ball are like the rays of the sun and like millions of pins. It is different from other stamens. Other stamens grow inside the flower and are wrapped like a baby, but its stamens are displayed outside and flutter in the wind. It's amazing!

The little bud that has just stretched out is like a hand on the branch, saluting the flower, and the flower's face turns red like a shy little girl. Mimosa Observation Diary 3

I have a pot of mimosa at home, and I like to play with it. The leaves of Mimosa are very strange. They are symmetrical and get smaller as they go up. Its color is a light green, and its leaves are small and thin, which makes people feel affectionate when looking at it. As long as you touch its leaves gently with your hand, it will close the leaves and bend the stems, like a shy little girl.

I have always wanted to know why this is. In a popular science book, the mystery was finally revealed to me:

There is an enlarged organ called a leaf at the base of its petiole. There are many parenchyma cells growing in the occipital and occipital cells, which are very sensitive to external stimuli. Once the leaf is touched, the stimulus is immediately transmitted to the leaf pillow. At this time, the cell fluid in the parenchyma cells begins to flow into the intercellular space, which reduces the expansion ability of the cells. The pressure between the cells in the lower part of the pillow decreases, resulting in leaf closure and petiole closure. The phenomenon of sagging. After 1-2 minutes, the cell fluid gradually flows back to the leaf pillow, and the leaves return to their original appearance.

The reason why the above-mentioned phenomenon occurs in the leaves of Mimosa pudica is a physiological phenomenon and the result of the long-term adaptation of Mimosa pudica to the external environment during the phylogeny process. Because mimosa is native to tropical areas, where there are often violent storms. When the storm blows the leaflets, it immediately closes the leaves to protect them from the damage of the storm, thus gradually forming this physiological phenomenon.

That’s it! It seems that this mimosa is quite smart! A small pot of mimosa hides so many mysteries. There are so many wonders in nature! Everyone must go and observe carefully! Mimosa Observation Diary 4

Last summer, someone gave us a pot of mimosa. At first, it was only six or seven centimeters long with a few incomplete leaves. My mother said: As long as you take care of it carefully, it will grow. Will live. So I raised it with a glimmer of hope.

One noon a few days later, I suddenly thought that it was time to water and fertilize it, so I looked towards the big place where the flower pot was placed. Ah, it is alive! As soon as I saw the pot I was so surprised that I almost jumped up. The ugly mimosa tree had straightened its slender waist and stretched out three tender green leaf buds. The tender green leaves were swaying in the wind, as if a little girl was stretching out her hand. Calling to me. I couldn't help but reach out and touch it, and it shyly closed its leaves.

After a while, it quietly spread out its leaves. It was so interesting. From that day on, I had to go see it or water it every day. I found that Mimosa almost grew a green leaf every day, and there was a green leaf between each set of leaves. They all have two or three small flower buds. After a week or two, the flower buds actually bloom into small purple-red balls. They are oval-shaped flowers with no petals. They are all thin stamens, like fun little pom-poms. . Facing the mimosa, looking back at the scene when my mother asked me to plant it in the flowerpot, I fell deeply into thinking. At this time, my mother came over, pointed at the mimosa, and said to me: You Look, although Mimosa is small, it has strong vitality. No matter what the environment, it can keep improving. People love it, but it always lowers its head and is never proud.

After listening to my mother’s words, I know that I want to be a self-improving, humble and simple person like Mimosa. Mimosa Observation Diary 5

In the evening, I looked at the mimosa raised by my mother. The leaves of Mimosa are getting fewer and fewer, and the leaves are turning yellow. They were bigger than before when I bought them, and they seemed to be dying.

I think it must be that my mother didn’t water or fertilize it. I touched its yellow leaves and it didn’t shrink anymore.

I shouted: "Mom, your mimosa is dying." Mom said: "It's dead when it's dead." I shouted: "You must have killed it by not watering or fertilizing it." "

"Don't you know how to water the house? I do everything, you are like a landlord."

I left angrily. Mimosa Observation Diary 6

Dad planted a pot of mimosa in a flowerpot on the balcony.

Mimosa looks like a small tree from a distance. There are four leaves on one of its branches, like a chicken foot. If you look closely, there are many densely packed small thorns on the stem. If we accidentally touch it with our hands, it will bleed. The flowers are pink yarn balls that resemble the ones worn by my mother. The fruits are like lentils, with two or three seeds in the pods.

In the morning, the sun came out, and the sunlight spread out on the leaves of the mimosa. At night, the leaves of Mimosa close up on their own, as if falling asleep. Mimosa Observation Diary 7

It turns out that there is a small pot of plant on the windowsill of our class. Her name is 'Mimosa', with small and thin branches growing on it. The tender little leaves are neatly arranged like two rows of little soldiers. She is very interesting. We touch her lightly with our little fingers, and its leaves slowly roll up, like a shy little girl. .

Why are mimosa shy? I have never found the answer to this question. Today while reading a book, I finally found the answer. It turns out: At the joint of the petiole of Mimosa pudica, there is a bulging bag called the pillow. There are parenchyma cells in the pillow. When the leaf is touched by the outside world, the vibration is transmitted to the pillow. At this time, the water in the parenchyma cells Immediately flows to the intercellular space and reduces the expansion ability of cells. The leaves will automatically close, and the petioles and twigs will droop at the same time. This characteristic of Mimosa is formed. This is also a self-protection ability of Mimosa pudica. This special ability is also an adaptation of Mimosa to the adverse external environment. It turns out that Mimosa's hometown is Brazil in tropical South America, where there are frequent storms. With this ability, Mimosa will not be attacked by storms. .

I used to think that Mimosa was just a small plant that wouldn’t grow too big. I didn’t expect that Mimosa would grow into a towering tree and bloom such beautiful flowers. Now I know that those elegant trees on the way to school are actually grown-up mimosa. In June and July, they will bloom pink flowers like small pom-poms. At this time, the whole tree will be covered with a layer of pink, like patches of pink morning glow, and like clouds of pink mist. It is so beautiful!

I have to tell you here, another magical ability of Mimosa. According to research by scientists, Mimosa can also predict earthquakes! Under normal circumstances, the leaves of Mimosa open during the day and close at night. If the leaves of Mimosa appear to be abnormally closed during the day and open at night, it is a precursor to an earthquake.

Mimosa is cute when it is young, elegant when it grows up, beautiful when it blooms, brave when it withstands storms, and has the special ability to predict earthquakes! It’s really something that can’t be underestimated! Mimosa Observation Diary 8

Last Monday in the experimental class, the teacher asked us to observe a plant.

Today is Saturday. I came up in the morning, put on my clothes, and went to observe the mimosa grown at our house. Its leaves are very beautiful, long, green, and extremely beautiful! I found Mimosa, if you don't touch it, it won't be shy. If you touch it, it will shy away, curl up its body, and close its leaves.

After lunch, I went to observe the mimosa again and found that the mimosa looked like it was sleeping, with its leaves drooping and shrinking when I touched it. After a while, I found that it looked unhappy, as if to say: Why did you wake me up? Didn't you see that I was taking a nap? You ruined my sweet dream, how annoying.

How about it? Aren’t the mimosa in my house very interesting? Mimosa Observation Diary 9

On Saturday, my father took me to the park. There are so many flowers, plants and trees in the park! There are beautiful butterflies dancing, and countless flowers are blooming. Those colorful and fragrant flowers seem to say: "Little butterflies, I invite you to be my guests." The butterfly nodded and said: " "Okay!" I accidentally found an unknown grass among the flowers. I tried to touch it and it closed its leaves. I felt very strange and ran to ask my father: "Dad, what kind of grass is that?" When I touched it, it closed its leaves? "

Dad observed it carefully and told me: "The grass you saw is Mimosa pudica." I asked: "Then why did it close. Where is the leaf?" Dad teased me and said, "It's shy!" I said, "It's really shy. It's so strange!" Dad smiled and said, "Haha, you can believe it, I'll tell you. That's because as soon as you touch it, the water in the leaves will flow into the stem, and you'll have to bend down if you touch the stem again. "Go back and read your encyclopedia!" I said embarrassedly: "I know, but you just lied to me. I'm going to hit you three times." "Okay, okay, okay." Dad said, and I took the opportunity to hit my dad three times.

It was noon, and my father said: "Let's go home, otherwise my mother should be anxious." My father and I reluctantly walked home. On the way, I thought: Mimosa is so interesting. Do you like it? If you have the opportunity to get to know it, I hope more children will get to know it. If you see it, don’t forget to touch it! Mimosa Observation Diary 10

Sunny Saturday, November 3

A piece of Mimosa was planted in the community. It grows relatively short, only about 50 cm tall, although its stems have not yet grown. The chopsticks are thick but straight and have many small thorns. There are six or seven branches on the stem and many neatly arranged leaves on both sides.

Mimosa is interesting. If something touches them, they will close their leaves in embarrassment, and the petioles will hang down for a while, and then they will slowly open. Looking at them, they really look like a shy little girl. It will also bloom and bear fruit. Its flowers are small white pompons and the fruits hang like bunches of bananas on the tree.

I like this mimosa very much. I go to see it and play with them from time to time.