Auxins are the plant hormones or plant growth substances that act like a substance that governs the pattern of tissues developed and the position of the various cell types within a tissue. This is a picture of a tomato plant in my Grandpa’s garden. The tomato plant, along with all plants, makes its auxin in its shoot apical membrane and the auxin travels downward in the phloem. Auxin is essential for cell growth, affecting both cell division and cellular expansion.
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