In the plant root, responses to light are known as a negative phototropism, which means the root grows away from the light. Auxins are chemicals that control the growth of plants by promoting cell ...
Auxin is one of the major five plant hormones, mostly present natively as free or conjugated indole-acetic acid (IAA), a tryptophan derivative. Polar auxin transport is tightly regulated ...
In a stem, the cells on the shaded side contain more auxin and grow longer than the cells on the light side. This causes the stem to grow towards the light. It is vital to note that the plant does ...