Question

"The effect of root pressure in transport of water is more important at night". Justify?

Answer 1

During the night time, the process of transpiration is next to impossible or negligible.

Also, the evaporation is also very less at the night.

This means the pressure on the roots is the major force that will allow the movement of water in a plant during the night hours.

Hence, it will require maximum efforts to pressure the flow.