Chapter 6

NCERT
Class 10
Science
Solutions
2. How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?
Promo GIF

Question:

How is the movement of leaves of the sensitive plant different from the movement of a shoot towards light?

Answer:

Thigmotropism

Sensitive plant leaves's movement is independent of growth and is touch-sensitive; this is known as thigmotropism. 

Phototropism

Phototropism is the shoot's growth-related inclination towards light.

Thigmotropism Phototropism
The sensitive plant’s movement is
the nastic movement known
as Thigmotropism.
The tropical movement that causes
the shoot to incline towards
light is Phototropism.
Exhibiting non-directional nastic
motion with no particular path.
Exhibiting unidirectional where
the stimulus originates.
Quick nastic motions Extremely slow tropic motions
Leaves and petals, a plant's
flat parts convey motion.
All plant sections exhibit these
motions when the shoot gravitates
towards light.

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