How does phototropism occur in plants?
Answer
Phototropism is the movement with respect to growth of plants towards the sunlight.
- Once the plant detects sunlight , the hormone auxin is secreted at the shoot tips .
- The secreted auxins diffuse towards the shady side of the plant
- This makes the cells on the shady side grow longer
- Thus, the plant appears to bend towards light .
Example of Phototropism:
Sunflowers grow towards the sunlight