Question

What is meant by positive and negative tropic movements in plants? Explain them by giving suitable examples. 

Answer 1

Positive tropic movements in plants:

Directional movement of a plant part towards the stimulus is called positive tropic movement.

Examples:

• Growth of shoots towards light
• Growth of roots towards gravity
• Growth of roots towards water

Negative tropic movements in plants:

Directional movement of a plant part away from the stimulus is called negative tropic movement.

Examples:

• Growth of roots away from light
• Growth of shoots upwards and away from gravity
• Growth of shoots away from water