Hydathode

Hydathodes or water columns are a special type water-separating glands that occur ( monocots and dicots ) in many plants. Through them, water can be excreted actively or passively, even at very high humidity. Such water removal by living cells under energy expenditure is called guttation. It pits two types of hydathodes on: Passive hydathodes in them guttation on the root pressure occurs, and active hydathodes in them guttation occurs with consumption of energy in the hydathodes itself

Hydathodes are often at leaf tips (eg grasses ) on teeth of the blade edge ( for example, when lady's mantle ) or at the end of large veins (eg nasturtium ). The name is formed from hydato ( nominative hydor ) "water" and hodos ( f) "way". A special form of trichome Hydathode is the Perldrüse.

Swell

• Peter Sitte, Elmar Weiler, Joachim W. Kadereit, Andreas Bresinsky, Christian Körner: textbook of botany for colleges. Founded by Eduard Strasburger. 35th edition. Spektrum Akademischer Verlag, Heidelberg 2002, ISBN 3-8274-1010- X.

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