Define root pressure. Mention two conditions when it occurs. - Vidyadip

Question

Define root pressure. Mention two conditions when it occurs.

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Answer

Root pressure is the positive hydrostatic pressure developed in the cortical cells that pushes the water into the xylem upto a certain height. It occurs:

When there is plenty of atmospheric moisture/ high humidity.
When the evaporation/ transpiration is low during low temperature of the night and early morning.

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