Hydathode – Water Stomata
(Structure and Functions of Hydathodes)
What are Hydathodes?
Hydathodes are specialized pores (openings) particularly present on the leaf margins, which exudes or secretes drops of water. The exudation of water as drops from the tip or margin of the leaves is called guttation. The process of guttation is facilitated by the hydathodes.
Ø They are also called as Water Stomata because they structurally resemble stomata and they facilitate guttation (secretion of droplets of water from the pores of plants).
Ø Hydathodes are commonly found in Angiosperms, especially in grasses.
Ø They are also present in some other plants such as water hyacinth, balsam, roses, Hibiscus and rarely in some non-angiospermic plants.