Question

How does water occur in plant at night when absence of transpiration?

Answer 1

night hours, transpiration is negligible and evaporation is very low. Therefore, root pressure is the major force for movement of water through plants during night, so its maximum effect can be observed during night.

Answer 2

Root pressure is the transverse osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves. Root pressure occurs in the xylem of some vascular plants when the soil moisture level is high either at night or when transpiration is low during the day.