Question

What do you understand by haptonasty?

Answer 1

Growth independent movements:

• Growth independent movements in plants occur instantly in response to an external stimulus.
• These reversible movements occur in plant organs that bend in response to a change in the turgidity of cells and hence, are called turgor movements.

Haptonasty:

• Haptonasty is a type of growth independent movement observed in Mimosa.
• In this type of movement, the leaflets fold, and the petioles droop in response to touch.