Question

How do photonastic and seismonastic Movement differ from each other
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Answer 1

Seismonastic movement are the various type of responses and movements which are shown by plants on receiving stimulus. The stimulus may be electrical, chemical, pressure, touch, heat, etc. The plant shows some kind of change in their structure and move away from the source of stimulus

When the movement is caused by presence or absence of light it is called photonastic movements. These movements are exhibited by florets and leaves which open in the morning and close at night. . These movements are popularly called as sleep movements. They are caused by changes in the osmotic potential of cells of the pulvinus  .Seismonastic movements take place in response to touch, mechanical, electrical, thermal or chemical stimuli. This movement is shown by the sensitive plant, Mimosa pudica. They are caused by change in the osmotic potential of cells of the pulvinus due to the movement of K+ ions.

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Answer 2

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Explanation:When the movement is caused by presence or absence of light it is called photonastic movements. These movements are exhibited by florets and leaves which open in the morning and close at night. . These movements are popularly called as sleep movements. They are caused by changes in the osmotic potential of cells of the pulvinus  Seismonastic movements take place in response to touch, mechanical, electrical, thermal or chemical stimuli. This movement is shown by the sensitive plant, Mimosa pudica. They are caused by change in the osmotic potential of cells of the pulvinus due to the movement of K+ ions.