Name (sing. stoma = mouth, orifice or opening) for the pores or stomata on leaves of plants and fungi. Gas exchange with the surrounding air takes place through these, especially the supply of carbon dioxide during photosynthesis. The transpiration (evaporation) that takes place through the pores creates a transpiration suction through which water with the nutrients it contains is transported upwards from the roots to the leaves. See also the keywords guttation and humidity.
![]()
As honorary chairman of the Domäne Wachau, it is the easiest and quickest way for me to access the wein.plus encyclopaedia when I have questions. The certainty of receiving well-founded and up-to-date information here makes it an indispensable guide.
Hans-Georg Schwarz
Ehrenobmann der Domäne Wachau (Wachau)