Question

What is sleep movement in plant?

Answer 1

Sleep movements are those which coincide with the diurnal changes in environment (day and night alternating with each other ).

Explanation:

Sleep movements are technically termed seismonasty. Most common example of sleep movements is folding of leaves after sunset and unfolding of leaves after sunrise in some plants, having bipinnate compound leaves. The unfolding and folding of leaves coincide with day and night.

Opening and closing of stomata, though are turgor movements, can also be cited as an example of sleep movements, because stomata open during day time and close at night.