Why do flowers wither? Why does love change color? 10

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The scientific principle of flower color change is pigment, which is the key to determining the color of the flower. The petals of the red flower contain anthocyanins, the yellow petals contain carotene, and the petals of the white flower are full of small bubbles and do not contain pigments

It is because the pigment in the flower will change with the temperature and the concentration of acid and alkali; It is related to whether the soil and flowers are fertilized or not.

Flower ornamentation

Flowers, which are herbaceous plants with ornamental value, are a general term used to depict the plants that are appreciated, and there are many kinds of short branches that are sun-loving and cold-tolerant, and have reproductive functions. A typical flower, on a short, limited-growth axis, bears calyxes, petals, and stamens and pistils that produce germ cells.

Flowers are composed of corollas, calyxes, receptacles, and stamens, and they come in a variety of colors and lengths, with or without fragrance. Flowers are divided into tropical flowers, temperate flowers, cold flowers, alpine flowers, aquatic flowers, rock flowers, and desert flowers. There are two interpretations of flowers, narrow and broad.

"Flowers" in a narrow sense refer to herbaceous plants with ornamental value, such as chrysanthemums, impatiens, etc. Flowers in a broad sense refer to any plant that has ornamental value in form or color as a flower, stem, leaf, potato fruit or root. Therefore, flowers in a broad sense include not only herbaceous plants, but also trees, shrubs, vines, and ground covers.

The color and intensity of flowers are related to the amount of anthocyanins and carotenoids, and environmental factors, such as changes in temperature and weather, also affect them.

The most prominent change in color is cotton.

When cotton first blooms, the petals are colorless anthocyanins, also known as anthocyanins, and some yellow pigments, and the flowers together are milky white and slightly yellow.

After the flowers bloom, when the sun is sufficient, the anthocyanins are produced faster, and the cotton respiration produces acid, so that the petals are more acidic, so the flowers are red, and later turn red until they become purple-red.

The flower color of many plants is fixed, which is determined by genetics, and once the color is changed, it means that there are variants, such as mountain peach with safflower, and its variant with white flowers.

Similarly, white lilac is a variant of lilac.

Morning glory will change due to the change of indoor carbon dioxide concentration, the low will be blue, and the high will turn red.

A very small part of them will, due to factors such as soil pH, internal pigments, temperature, etc., like morning glory.

Hibiscus: Generally white or pale red when it first opens, and then gradually turns dark red. The flowers of the three drunken hibiscus can change three times a day, the flowers that bloom in the early morning are white, turn pale red at noon, and turn dark red in the evening.

Mulberry hibiscus and rent are the best of the color-changing flowers, and their color-changing skills are no less than those of the chameleon in the animal kingdom. The flowers are white when they first bloom, pale red on the second day, yellow on the third day, dark red on the fourth day, and purple again at the end.

Morning glory: blue in the morning and gradually red in the afternoon. This is because the anthocyanins contained in morning glory appear blue in alkaline solutions and red in acidic solutions.

As the concentration of carbon dioxide in the air increases from morning to night, the absorption of morning glory gradually increases, and the acidity in the flower also increases, so the color of the flower changes from blue to red.

Wang Lian: The most famous ornamental plant in the world is that its flowers are very large, blooming and closing at dusk. In the evening, the buds that have just come out of the water bloom with white flowers; The next morning, the petals closed again, and when the flowers bloomed again at dusk, they turned from white to red. Eventually, it gradually changes from pale red to deep red.

The main pigment of flower color is called "anthocyanins", which are distributed in the vacuoles of cells and control the color changes of flowers such as pink, red, purple and blue. Anthocyanins are very mischievous and form different colors in different environments. In an acidic solution, it appears red, and the more acidic it is, the redder the color, such as a string of red, etc.

In the alkaline solution, it is blue, alkaline and strong, and will become a blue-black land tour, such as black chrysanthemum, black peony, etc. And when it is in a neutral environment, it is purple, such as bellflower flowers.

What's even more amazing is that some flowers can change color three times a day, such as the petals of morning glory are pink in the morning, then purple red, and finally blue. The reason for this is that the pH value in the vacuole of the epidermal cells of the petals changes, and the anthocyanins change accordingly, resulting in a change in the color of the flower.

Although anthocyanins are powerful, the color of the flower is not all controlled by it, and another type of pigment that is widely present in the petals is carotenoids. This pigment is "as its name suggests" and exhibits a color similar to that of a carrot. At present, more than 600 kinds of carotenoids have been discovered, and different kinds of carotenoids can make flowers show yellow, orange-yellow, orange-red and so on.

For example, carotenoids are the main components of pigment in the petals of yellow spring flowers.

In addition, the pigments that affect the color of flowers are flavonoids, quinone pigments, beet pigments, etc. Thousands of purples and thousands of reds, colorful, mainly because of the different pigment composition and proportion in the flowers of different plants. As for the white flowers, it is because the cell fluid does not contain pigments.

The green flowers, on the other hand, contain chlorophyll.

From this point of view, the pigment in the flower plays a key role in the formation of the flower color, but the pigment is not the only factor that affects the flower color. The difference in the tissue structure of the petals affects the refraction and reflection of light, which in turn affects the color of the flower. At the same time, ecological factors will also affect flower color, such as light, temperature, humidity, soil nutrient content, will affect the pH value of petal cells, enzymes, sugar content, stability of anthocyanins, etc., and then affect the synthesis of anthocyanins or lead to changes in the molecular structure of some anthocyanins, resulting in different colors of petals.

Content from the user: Expert.

Why do some baijiu flowers change color?

Ten years ago, biologists in a study conducted in Zhi Europe found that there is a kind of flower that changes color This flower is milky white in the morning, turns pink at noon, turns dark red in the evening, and turns violet in the early morning until the flower withers

Coincidentally, biologists later discovered a wonderful flower that changes color, this flower is called red calamus Its flowers were originally red, but with the change of the animals that spread pollen, the flowers will change from red to white Scientists have observed that pollen is mainly hummingbirds at first, and then mainly moths When hummingbirds spread pollen, the flowers of red calamus are red; When the hummingbird flies away, many of the flowers turn from red to white, and many moths fly around the white red iris bushes to spread pollen for the red calamus

Why do red iris flowers change color? It turns out that red iris grows in the mountains of the southwestern United States and usually blooms in mid-July When most of the red iris flowers in the highlands are blooming bright red flowers, it is just when hummingbirds, which like red flowers, migrate from the highlands to the lowlands And the moths like white flowers, so the red iris flowers change color to attract new pollen spreaders According to statistics, about 40 of the red iris flowers at that time turned into white flowers In order to gain the liking of the moths, the red iris took the initiative to change the color of the flowers to adapt to the environment

。。One is related to the type of pigment in the vacuole in it. These pigments, in turn, are affected by enzymes. It will cause different colors due to different angles and different lighting.

Two may be. The genes in the ovules of this flower are different. Resulting in different suits.

There are various pigments in the petals, such as chlorophyll, carotene, etc., which will change with the change of temperature. Let the flowers show different colors.

The internal law of the production of color is "pigment", which is the key to determining the "color".

The petals of the safflower contain anthocyanins, the yellow petals contain carotene, and the petals of the white flower are full of small bubbles and do not contain pigments.

It is because the pigment in the flower will change with the temperature and the concentration of acid and alkali; Second, it is related to whether the soil and flowers are fertilized or not.

There are many kinds of color-changing flowers, the most famous of which is Garland, when it blooms, the petals are green at first, rolled into the shape of dragon claws, but by the next day, the middle of the petals becomes yellow, the tip of the petal is bright red, the petals are inlaid with gold edges, after 3 days, the stem and middle of the flower are respectively from green, yellow to golden, orange-red, and finally completely turn into bright red, looking like a raging fire from a distance.

Wind and rain flowers, will ** storm coming. Every two or three days before the storm, they will be eager to bloom thousands of small flowers, like the sky full of stars falling to the ground, people know that a storm is coming!

The color of the flower mainly depends on the type of pigment it contains, and the formation of pigment is related to light and temperature. For example, morning glory changes color depending on the light every day, and it will become several colors a day.

The color is different when the pH value is different.

The compounds produced have changed, just as people change when they get older.

It is possible that the pH level has changed.