2.81 Phototropism

Describe positive phototropism of stems.

Phototropism is the growth of a plant in response to light.
Positive phototropism suggests that this growth is towards the light.
The stem of a leaf will grow in the direction where there is the highest concentration of light. if the direction of light changes, the plant will grow to whichever direction has the highest concentration of light. This is called positive phototropism. this occurence is cause by the hormone auxin.

light -> growth -> towards light