Why the sunflower turns with the sun
Sunflower is a very beautiful ornamental flower. In addition to its shape resembling the sun, its flowers are bright and generous, and it is very popular with people. The ornamental sunflower (Helianthus annuus) is native to North America and is an annual herbaceous plant in the Asteraceae family. It is named because the inflorescence rotates with the sun.
The seeds are called sunflower seeds, commonly known as sunflower seeds, which can squeeze high-quality low-cholesterol sunflower oil, and are a snack suitable for all ages. The flower language of sunflower is love, brilliance, and loyalty. Russians, Peruvians, and Bolivians regard sunflower as a symbol of lightness and beauty and choose sunflower as the national flower.
People have long discovered that sunflowers are always turning around facing the sun all day long. Why is this? It turns out that plants have a substance called auxin, which can make plants grow tall and large, But it is timid and afraid of the sun.
The auxin in the neck of the sunflower runs to the side of the backlight to avoid it when it sees the sun, so there are more and more auxins on the side of the backlight. Slower, so the plant bends towards the light side. As the sun moves in the sky, auxin also moves like a “hide-and-seek” with the sun on its back. Therefore, we often see that the sunflower faceplate can always face the sun from east to west every day.
During the period before the sunflower germinated to the flower disk full bloom, its leaves and flower disk followed the sun from east to west during the day, but it was not followed immediately. Botanists have measured that the orientation of the flower disk is about 12 degrees behind the sun 48 minutes.
After the sun goes down, the sunflower’s faceplate slowly swings back, and at about 3 am, it faces east again and waits for the sun to rise. However, once the flower tray is in full bloom, it no longer turns toward the sun but instead faces east.
Then, in addition to sunflowers, there are many kinds of plants whose flowers or leaves can also grow towards the sun. Are they also because auxin is afraid of the light? No, they grow towards the sun to get more sunlight, Make more nutrients to make you grow better.