How does a sunflower chase the sun?
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Sunflower has a ' sunwardness ' in which the stem refracts in the direction of strong sunlight. Due to this property, it is possible to change the direction in which the buds and flowers are turned according to the movement of the sun, but Science Magazine explains in a movie about the mechanism that follows the movement of the sun.
Why sunflowers follow the sun-YouTube
Young sunflowers have the property of chasing the sun moving from east to west during the day.
At night, sunflowers turn east and wait for sunrise.
The larger sunflower no longer follows the movement of the sun and is fixed eastward.
The mechanism by which young sunflowers can follow the movement of the sun is due to 'uneven growth'.
During the daytime, the stalk of sunflower grows on one side only. By growing only one stem, it is possible to change the direction of the bud according to the movement of the sun.
At night, the stem on the other side begins to grow, so the bud faces east.
Such uneven growth is caused by genes that respond to light and the Earth's circadian rhythm.
The sun-based behavior of sunflowers has positive consequences for sunflowers.
It also makes sense that the orientation is fixed eastward as an adult.
The sunflower flower is fixed in the east direction, so the temperature rises. As a result, it has the effect of attracting insects, which are pollinators.
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