Please explain why the sunflowers are facing the sun? in more detail .

Why do sunflowers face the sun.

Because the sunflower mold width will always revolve around the sun. When the sun just rises, the sunflower faces the sun, the sun is moving, and the direction of the sunflower is also moving, so the wanderer will call it sunflower.

It is called a sunflower because it looks like the sun and is constantly turning towards the sun.

I think it's because it's turning towards the sun, so I think the growing conditions for sunflowers are very mild.

A little Dan's heart is to the sun, and the golden flowers are born naturally. Blooming brightly and dazzlingly, the sun is smiling at the sky.

The diversity of plants determines the size of their respective photosynergy, any plant should be photosynergistic, as the sun rises and sets, plants need abundant light according to their respective characteristics of chlorophyll, in this regard, the sunflower is more than the light required by other plants, in order to get abundant light to stop photosynergy, has been facing the sun, so that with the sun turning, until the grain is full of turn.

1.Whether a sunflower is facing the sun or not depends on what stage of growth it is in. Before the sunflower sprouts and blooms, it is indeed facing the sun.

It is the leaves and the flower disc following the sun from east to west, this following is not immediate, some scholars have measured that the flower disc points about 12 degrees behind the sun, that is, 48 minutes. After the sun goes down, its flower disc gradually swings back again, and at about 3 o'clock in the morning, it faces east again. Wait for the sun to rise again.

2.All it is is that once its flower disc is in full bloom, it no longer rotates, but is fixed towards the east. Why is it fixed to the east in the end, rather than upwards or something else?

It should be said that this is the result of natural selection, it turns out that the pollen of sunflowers is afraid of high temperatures, and if the temperature is higher than 30 degrees, it will be burned, and it will be fixed towards the east, which can prevent direct sunlight at noon and reduce radiation. The early morning sunlight helps to dry the dew that condenses at night, reducing the likelihood of mold infestation, and on cold mornings, the sunflower discs become warm nests that absorb insects to stay there to aid pollination.

3.The sunflower turns due to the fact that it has an ingenious auxin in its body.

This auxin has very properties: it can accelerate or inhibit the growth of cells; When it encounters light, it will run to the backlit side; Characteristics of polar transport. When the sun rises in the east, the east side of the sunflower is reflected by the sun, and the backlit side of the vigorous top young stem is more distributed, and it elongates longitudinally, so that the result of growth is that the young stem bends towards the east side of the stunted growth, that is, the top of the sunflower bends east in the morning.

4.As the sun moves in the sky, the direction of the light changes, and the flower disc changes direction from time to time. When the sun sets, the light disappears, and the uneven distribution of auxin in the plant caused by the light disappears.

The heterogeneity of auxin caused by gravity rises to the dominant position. More auxin is scattered on the underside of the young stem of the sunflower, so the cells on this side increase and lengthen, causing the sunflower plant to straighten. It should be said that the sunflower is straight at night, which is a natural response to gravity.

The reasons why the flower disc no longer rotates in the end: first, the accumulated gravity; Second, maturity is approaching, and the growth process is fundamentally complete.

In conclusion, sunflower sunshine is the result of light and gravity.

I have understood the reason, mainly because of auxin, plus the growth demand of sunflowers, as well as edible value and economic value, so it will cause sunflowers to face the sun.