Phototropism

Important Notes to Know:

• The word photo in phototropism revers to light and tropism as in  growth response, so phototropism means light growth response. 
• positive phototropism means growth towards the light.
• wherever the light hits on the plant the compound called auxin moves in the opposite direction. 
• Auxin is a plant hormone.  
• Auxin causes plant growth this causes plants to bend towards light.