The effect of root pressure is observable at | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Root pressure is a positive pressure that develops in the xylem of roots due to the active absorption of mineral nutrients from the soil. This pro

Vedclass · Accepted Answer

Evaporation is low and absorption is high

Vedclass · Answer

(B) Root pressure is a positive pressure that develops in the xylem of roots due to the active absorption of mineral nutrients from the soil. This process leads to water entering the root cells by osmosis,creating a positive hydrostatic pressure. At night and in the early morning,the rate of transpiration (evaporation from leaves) is very low because the stomata are closed or environmental conditions are humid. However,the active absorption of ions by the roots continues,resulting in a net influx of water into the xylem. Since there is little transpiration to pull the water column upward,the accumulated water exerts a positive pressure,which can be observed as guttation (the exudation of water droplets from the tips of leaves). Therefore,the effect of root pressure is most observable when evaporation is low and absorption is high.

The effect of root pressure is observable at night and early morning when:

Similar Questions

Where are the control points located in the context of water transport in plants?

The force of tension cohesion exceeds root pressure on a

Which one is against the theory of ascent of sap given by Dixon and Jolly?

Which one of the following is the most accepted theory of ascent of sap?

Keeping a freshly cut leafy twig in a $fuchsin$ solution reveals that:

Vedclass Test Series

Exam Paper Generator

Online Exam Module