Question

The leaflets of a sensitive plant
sensitive plant become folded
When touched - What type of
movement is this?​

Answer 1

1. Seismonastic Movement: This type of movement is caused by the mechanical stimuli like shock, touch or contact, fast moving wind, rain drops, etc. In some parts of plants Seismonastic movement is seen in the stigmas, stamens and leaves.

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Answer 2

The angle between the midrib and the vein of each leaflet ranges from 25° to 85°. When the leaflets fold in response to touch, this angle decreases to between 15° to 25°. The leaves of the Mimosa achieve this rapid folding by a change in turgor pressure.