How do plants grow towards light?

A hormone makes sure the plant has enough sunlight to survive

Phototropism With the help of the hormone auxin, plants can get as much light as possible Plants depend on a process called photosynthesis to make their own food. This process converts water from the soil and carbon dioxide in the air into oxygen and glucose (sugar). Sunlight is crucial for this chemical change and without it, green plants are unable to survive. Plant cells contain a protein called phototropin, which is activated when it absorbs the blue wavelength of light. This leads to an uneven distribution of the hormone auxin (which regulates growth) in the stem. The exact mechanisms behind this process are not fully understood, but one theory is that sunlight destroys or inhibits auxin so the hormone levels on the Sun-facing side reduce. Another theory is that auxin molecules are able…

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How It Works Book of Incredible Earth (Digital) - 1 Issue, How It Works Book Of Incredible Earth 6th Edition

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