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Auxin is a phytohormone essential to the growth and structural development of plants. This substance is influenced by a variety of environmental factors, and in turn affects a lot of the plant’s different functions. It can be present in the stem, buds, and root tips of plants.

One of the most popular plant functions it is responsible or is phototropism, controlling how the plant moves and bends in relation to light, as well as cell elongation, cell division, and inhibiting growth of lateral buds.

Some other ways auxin is known to affect plants is in regulating the plant’s response to gravity through gravitropism, structure of root and shoot development, and vascular development.

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