Plant Growth and Development Question 6
6. Movement of leaves of Sensitive Plant, Mimosa pudica are due to
(a) thermonasty
(b) seismonasty
(c) hydrotropism
(d) chemonasty
Show Answer
Answer : b
Hints & Solutions
(b) Mimosa pudica (touch me not) leaves show seismonastic movement in response to physical contact. The movement is because of turgor changes due to ejection of water by cells of pulvinus (swollen leaf base) on touching it. It causes folding and drooping of leaves.
