The production of xylem sap drops from hydathodes on the tips or edges of the leaves of some vascular plants, such as grasses and fungi, is known as guttation.
It frequently happens at night or in the early morning.
The pace of guttation reduces throughout the day because of rapid evaporation caused by high sunshine.
Guttation is induced by root pressure, resulting in irreversible water loss.
Plants discharge surplus absorbed water through guttation and transpiration, which cools the plant and the surrounding environment.
When the surrounding atmosphere becomes hot, this cooling occurs.
Hydathodes:
Hydathode function is to remove excess water via a process known as guttation.
It's most common in flowering plants (Angiosperm).
Hydathodes can be found in a variety of plants, including water lettuce, water hyacinth, rose, balsam, and many others.