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  • Development of root pressure is caused byOption: 1 Passive absorption of mineralsOption: 2

Development of root pressure is caused by

Option: 1

Passive absorption of minerals


Option: 2

Active absorption of minerals


Option: 3

Passive absorption of water


Option: 4

Active absorption of water


Answers (1)

best_answer

 

 

 

Mechanism of Root Pressure Development:

  • The non-osmotic active absorption of water from the soil by the root hair cells and then the movement of water to the xylem elements generate a hydrostatic pressure.
  • This pressure is called the root pressure.
  • It is the result of the expenditure of energy to create high osmotic pressure in the root hair cells as well as in the xylem elements so that water can follow the concentration gradient.
  • Root pressure is sufficient to raise the water column up to 60-70 ft height.
  • But it cannot cause ascent of sap in tall trees that are more than 100 ft tall.
  • Root pressure is not seen in gymnosperms.
  • It is also absent from the actively transpiring leaves.

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Root pressure can be defined as the hydrostatic pressure that develops in the tracheary elements of the xylem. It develops due to an active process. The metabolic energy is spent in the generation of root pressure. Hence, the correct answer is option b.

 

Posted by

Nehul

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