Why is auxin distributed more in plant backlight than on the light oriented side?

Because auxin is partially broken down by light.

Abscisic acid is more distributed on the light side.

Lateral transport of auxin.

In fact, many flowers and green plants will basically grow under certain conditions, and the phenomenon of growth deviation will occur, which is to talk about the phototaxis of plants. If one side is bright enough and the other is darker, it will cause the plant to grow away and go to the well-lit one. The growth of the duck palm wood only to one side indicates that when the duck palm wood is exposed to light, the auxin in its body moves to the light side, resulting in the rapid growth of the light side, and the slow growth of the backlight side, and the growth of the stunted side.

Don't worry about this problem, just turn the side of the potted plant that is not growing well to get enough light.

There will be all kinds of problems when cultivating green plants at home, for example, there is a problem now that the green plants at home, why one side grows more luxuriant, and the same does not grow luxuriant, that is, it only grows to one side, what is going on? It must be because of our improper breeding methods, if it is a sun-loving green plant, it may be uneven light, and one side that has been exposed to the sun for a long time will grow faster, and the other side will also grow to the place where the light is sufficient. The solution is to rotate positions frequently.

On the other hand, the condition is good, the growth is very vigorous, and, according to the principle of survival of the fittest, the long prosperous will be more and more prosperous, and the undesirable will be even less ideal, as a bonsai, we must not want to see such a situation, then, what should be done to grow green plants only to one side, mainly uneven light, to adjust the position regularly, turn the pot. Grow in the direction of the sun, as is the case with this pot of plants in your house, just change the angle and keep the leaves on the back facing the sun for a while.

With sunlight, the leaves of plants produce chlorophyll chlorophyll, which produces starch along with the absorbed water nutrients and carbon dioxide absorbed by the leaves, and the production of starch by plants for plant growth produces oxygen at the same time, which is emitted from the leaves along with excess water. Because plant growth mainly depends on the organic matter transformed by photosynthesis, sunlight allows plants to produce photosynthesis, which will speed up the photosynthesis of plants, coupled with the law of plant nutrition near ** and longitudinal and idyllateral transportation, so the solar side of plants grows more lush.

Because light inhibits the activity of auxin, there is relatively more auxin on the backlit side, which naturally grows faster.

The answer you want should be: auxin will turn away from light **Plants, in order to allow plants to get more sunlight for photosynthesis, so plants tend to grow in sunlight Detailed explanation: Let sunlight be on the left side of the plant.

When sunlight shines on the left side of the graft, because auxin is phototropic (so the auxin at the tip of the plant stem will tend to go to the right) The high concentration of pure auxin on the right side of the plant **The extension zone of the stem grows faster than the left, so the whole plant grows to the left, which is also the phototropism of the plant (that is, in order to get more sunlight for photosynthesis and tends to grow in sunlight), caution example: sunflower Note: 1 High concentration of auxin will accelerate the growth of the stem 2. High concentration of auxin will inhibit the growth of roots 2008-10-05 15:

38:01 Supplement: Auxin when subjected to unilateral light **.

Does the point of solving auxin turn away from the light? In fact, auxin is an unstable chemical, so long-term light can partially decompose it, resulting in a decrease in auxin on the light-facing side, so there is more auxin facing the light. 2008-10-10 06:

55:35 Supplement: Towards the ground is the gravity that causes auxin to gather at the root tip.

to the water. Auxin makes it easy to extend the cell wall.

When there is water on the left side of the water suction.

It will extend to the left.

Reference: Yourself.

a. Plant phototropism cannot reflect auxin.

The duality of plant phototropism is due to the low concentration of auxin on the phototropic side and the high concentration of auxin on the backlit side, a error;

b. Gibberellin.

The physiological effect is to promote cell elongation, so gibberellin is often used to treat reeds, increase fiber length, used in papermaking, b correct;

c. Ethephon can be used for the ripening of fruits, and c is correct;

d. Abscisic acid.

In the plant body in the root crown, senescent leaves and other senescent parts of the synthesis, d error so chosen: BC

Its chlorophyll does not function normally, and it is using nutrients, so it will be like this.

It should have something to do with photosynthesis.