Question

Leaf of Mimosa droops down on touching because of

• A. Water loss from leaflet bases.
• B. Changes in water concentration.
• C. Loss of water cells to intercellular spaces in pulvinus and pulvinules.
• D. All of the above.

Answer 1

The correct option is C Loss of water cells to intercellular spaces in pulvinus and pulvinules.

Mimosa pudica is the common touch-me-not plant. It is affected by thigmonasty where the external stimulus is touch. This plant droops when touched because of loss of water cells to intercellular spaces in pulvinus and pulvinules.