Why do sunflowers always turn towards the sun?

Originally, auxin is mainly formed at the tip of the shoot and transported to the base. The distribution of auxin is affected by light: low auxin concentration on the light-oriented side and high on the backlit side.

In this way, the growing zone on the light-facing side grows slower and the backlit side grows faster, resulting in a phototropic bend of the stem.

In recent years, with the improvement of the level of science and technology, scientists have made new additions to the explanation of the sunflower phenomenon. They found higher concentrations of lutein oxide from the growing zone of the stem of the sunflower. This substance, contrary to auxin, inhibits cell elongation.

Scientific experiments show that when the light is irradiated from one side for 30 minutes, the concentration distribution of lutein on both sides of the sunflower seedling growth area is as follows: the concentration of lutein on the light-oriented side is high, and the concentration on the backlit side is low.

This is the opposite of the concentration distribution of auxin. So, the positive aspect of sunflower also has a lot to do with lutein oxide. In other words, the sunshine of sunflowers is the result of the combined action of auxin and lutein oxide.

Sunflowers rotate with the sun because of the auxin underneath the flower disc, which promotes the growth and reproduction of the plant. There is also the restriction of sunlight, and the stem will drag its flower disc and bend towards the side with the sun. When there is sunlight, sunflowers will rotate with the sun.

When the sun goes down, the auxin it contains is redistributed again, so it returns to its original position.

The sunflower turns towards the sun because it needs sunlight for photosynthesis and converts sunlight energy into energy for plants. The inflorescence of a sunflower is made up of many small flowers that require photosynthesis to grow and open.

The sunflower is able to sense the position and direction of sunlight because it contains a substance called a biological clock at the base of its flower stem, which can sense the direction and intensity of light. In the morning, the sunflower flowers will face east, and as the sun rises, the flowers will gradually turn west. In the evening, the flowers will stay in their last position, waiting for the sun to rise again the next day.

In addition, there is another reason why sunflowers turn towards the sun in order to maximize the use of sunlight. When the flowers of a sunflower are facing the sun, they have the largest leaf area and can absorb the most sunlight. In this way, sunflowers can better complete photosynthesis and grow more healthily.

Summary. Hello dear, I am happy to answer for you: why do sunflowers follow the sun and reply as follows:

The reasons why sunflowers turn towards the sun are: 1. Sunflowers themselves are phototropic. 2. There is a special "plant biochemical" in the stem of the sunflower that moves with the sun.

3. The auxin of sunflower is distributed by backlight, and the backlit side grows faster and the light-oriented side grows slower. As a result, the stems of sunflowers are curved against the sun, all the way towards the sun.

Hello dear, I am happy to answer for you: why do sunflowers turn with the sun Reply is as follows: The reason why sunflowers turn towards the sun is:

1. Sunflowers themselves are phototropic. 2. There is a special "plant biochemical" in the stem of the sunflower that moves with the sun. 3. The auxin of sunflower is distributed by backlight, and the backlit side grows faster and the light-oriented side grows slower.

As a result, the stems of sunflowers are curved against the sun, all the way towards the sun.

Pro, breeding sunflowers is also very particular, can be divided into four aspects, namely seed selection, sowing, planting, maintenance. If you want to grow sunflowers on a large area, it is best to choose edible varieties, and if you want to choose small varieties for ornamentation, you can choose potted sunflowers, and choose full-grained, disease-free seeds. The sowing time of sunflowers is generally in April, when the temperature reaches about 20 degrees is the time to sow seeds, sowing seeds directly into the soil, and then covering a layer of fine soil about 2 cm thick, and finally watering thoroughly, and so on 3-5 days The seeds will germinate.

When the sunflower seedlings have grown to about 20 cm in height, they can be transplanted into new soil and planted according to the prescribed row spacing, and after planting, they should be watered and exposed to sufficient sunlight.