Why do sunflowers turn toward the sun and turn back at night?

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1. Why towards the sun

2. Will you turn around suddenly at night?

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Sunflowers themselves contain special auxin, and this auxin is afraid of light. Therefore, when the sun is shining, it will turn its back. The side facing away will grow quickly, and the side facing the light will grow slowly. Over time, it will bending. In addition, it is also related to flavonoids and gravity. But it doesn't turn back suddenly at night. After the sun goes down, the auxin will be redistributed, forcing it to turn back slowly. However, once the flower is fully open, it will no longer turn and will always face the east.

1. Why towards the sun

1. Why face the sun

It contains special auxin itself, which is afraid of light. It is mainly distributed on the stem tip, so when the sun shines, it will turn away, and the backlit side will If it grows and reproduces rapidly, the side facing the light will grow more slowly, and it will become curved over time. In addition, it is also related to flavonoids and gravity. Flavonoids can hinder cell growth, and the content is higher on the sunny side. Gravity means that the early growth and tender stages will rotate with the sun, but not the later stages.

2. Will it turn around suddenly at night

< p>Sunflowers don't turn back suddenly at night. They turn back slowly after the sun sets, because without light, their auxin will change and be redistributed, forcing them to turn back. Start facing the east around three o'clock in the morning and wait for the sun to rise slowly. This phenomenon mainly occurs before the flowers are fully in full bloom. After they bloom, they will no longer rotate and will always face the east.

2. Will you turn around suddenly at night?

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