Sleeping movements in some plants is called

Options

(a) seismonasty
(b) nictynasty
(c) photonasty
(d) thermonasty

Correct Answer:

nictynasty

Explanation:

Sleep movement or nyctinasty (sleep movement during night) occurs in the leaves of many legumes and Oxallis is due to turgor changes in response to darkness. The leaves fold at night but open during the day. Leaves of Mimosa pudica also show sleep movement, called as seismonasty (shock movement) in response to physical contact, injury, electric current etc. The movement occurs due to osmotic changes.