Botany - Transport in Plants Question with Solution | TestHub

Effect of root pressure is also observable at night and early morning when evaporation is low, and excess water collects in the form of droplets around special openings of veins near the tip of grass blades and leaves of many herbaceous parts. Such water loss in its liquid phase from hydathodes is known as guttation. It occurs when rate of absorption is more and rate of transpiration is less. Epithem is a loose tissue under the hydathodes.