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  • .Maximum root pressure is observed whenOption: 1 Transpiration and absorption are very lowOption: 2</st

.Maximum root pressure is observed when

Option: 1

Transpiration and absorption are very low


Option: 2

Transpiration and absorption are very high


Option: 3

Transpiration is high and absorption is low


Option: 4

Transpiration is low and absorption is high


Answers (1)

best_answer
 
  • 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.
  • This theory is supported by Guttation.
  • Guttation occurs during the nights and early mornings when evaporation is low and the excess water absorbed by the roots collects in the form of droplets around the special openings veins called hydathodes.
  • Hydathodes are present at the tips and margins of the leaves.
  • Guttation is the loss of water in the form of liquid.
  • Root pressure is measured by manometer.
  • It is maximum when the rate of transpiration is very low and water absorption is very high.

It is maximum when the rate of transpiration is very low and water absorption is very high. Hence, the correct answer is option d.

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Riya

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