CBSE Class 10 Answered
What is the cause of nastc movement found in mimosa pudica plant
Asked by saradamahapatra9999 | 23 Oct, 2020, 04:22: PM
Expert Answer
- The movement of Mimosa pudica is driven by turgor pressure, which is the pressure exerted on the cell wall because of the movement of water into the cell.
- The environmental stimuli induces an electrical signal (action potential) transmitted from touch-sensitive cells.
- The action potential moves from cell-to-cell until it reaches specialized “motor cells” at the base of each leaf-blade or leaflet.
- From here, movement occurs as the action potential translates into a chemical signal, which causes rapid efflux of potassium (K+) followed by water transport out of the motor cells due to osmosis.
- The greater the intensity, the farther the signal will travel, resulting in greater movement.
- As a result, there is a loss in cell pressure and cell collapse causing the leaves to close.
- The leaves will usually return to their original orientation after 10-15 minutes.
Answered by Sheetal Kolte | 24 Oct, 2020, 12:19: PM
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