NEET BIOLOGY

PLANT PHYSIOLOGY

PLANT MOVEMENT

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How do sensitive plants transfer information from point of touch to point of movement
A
Electrical message
B
Chemical message
C
Electrochemical message
D
All of them
Explanation: 

Detailed explanation-1: -Certain plants like Mimosa pudica (touch me not ), our touch acts as stimulus for plant and it closes its leaves in return. Some chemicals are released from the stem when we touch the plant. These chemicals force water to move out of the cell leading to the loss of turgor pressure.

Detailed explanation-2: -The plant’s unusually quick response to touch is due to rapid water release from specialized cells located at the bases of leaflet and leaf stalks. The leaves reopen in several minutes, and it is thought that this adaptation is a defense against browsing herbivores who may be startled by the movement.

Detailed explanation-3: -The movements are attributed to the amount of auxin, K+ ions and therefore the movement of water. Entry of water to the lower side of the pulvinus causes the leaves to stand erect and the exit of water causes them to droop.

Detailed explanation-4: -The leaves of Mimosa have the capability to display thigmonasty (touch-induced movement). In the sensitive plant, the leaves respond to being touched, shaken, heated or rapidly cooled. The speed of the response depends on the magnitude of the stimulus.

There is 1 question to complete.