It's an interesting phenomenon that sunflowers turn to the sun. Because when it comes to light, it will rotate with the sun, but this means that during the period from germination to blooming of its plants, its leaves and flower plates will rotate with the sun, and from east to west, and when the flowerpot is blooming, it will not rotate, but will face the East.
In fact, although the flowers and leaves of sunflower rotate with the sun, in fact, this is not in real-time synchronization. Scientists have measured that its rotation will slightly lag behind the sun. When it turns, the sun rises in the morning, and it will turn to the West. After the sun sets, its flower plate will slowly swing back. At about 3 o'clock in the morning, it will turn back to the East.
The main reason for turning to the sun is the influence of light
The auxin of sunflower is distributed on the top of the stem tip and continuously transported down. It will be affected by the light. Generally speaking, its auxin is distributed in the backlight, and the concentration on the side facing the sun is relatively low, but the concentration on the side facing the light is relatively high, so the growth on the backlight side is faster, and the growth on the side facing the light is slower, which makes the stem produce a backlight bending, making it always facing the sun.
In addition, it is also believed that the reason why sunflowers turn to the sun is also related to gravity and xanthoxygenin. In terms of gravity, it means that it will rotate with the sun in the early stage of growth and the tender stage of flowerpot; in terms of lutein, it means that this kind of substance can hinder the growth of sunflower cells. Generally, the concentration of lutein on that side of the light is higher, so it will make sunflower grow slower on that side of the light, and then bend.
OK, that's how sunflowers come from. Isn't it amazing?
