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Related to Guttation: Hydathodes


The discharge of water from a plant surface, especially from a hydathode.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



the exudation of water droplets by plant leaves, occurring when more water is absorbed by the roots than is evaporated by the leaves. It is observed mainly at night, in the early morning, or when plants are placed in a humid atmosphere; it is often observed in young sprouts, such as those of grains, whose root-system development overtakes the development of the evaporative surfaces of their leaves. The drops of water are secreted through water stomata under the action of root pressure, by the force of water pressing into the stems and leaves. Guttation is a physiological process connected with the life processes of the plant; if wheat sprouts are placed under a cone inside of which there is chloroform vapor, guttation ceases. Secretions of guttation always contain a number of mineral substances. Evidently guttation rids the plant of excess salts, mainly calcium.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
Guttation refers to the process of exudation of liquid droplets,
guttation has passed through several phases of change and advances
machinery and mouths of guttation, absorb and retrieve solutes which are
in the guttation fluid that are also transported to the sites of active
view of significance of guttation in transport of nutrients, water,
When considering total dew in turfgrass systems, the possibility of wound exudates or guttation from individual leaves make the potential contribution of plant-generated moisture much more important than in other crops.
Compostion of guttation fluid from rye, wheat and barley seedlings.
The importance of guttation fluid on turf diseases, p.
Dew and guttation: formation and environmental significance.
For example, many studies show that teeth are strongly associated with the movement of water out of leaves via transpiration and guttation. This suggests that one of the functions of teeth in colder climates is to boost sap flow and also that untoothed margins correlate with leaf thickness and, in turn, with temperature.
Possible explanations for reduced brown patch injury in daily-irrigated turf include alteration in microclimate and conditions necessary for fungal colonization (e.g., daily dew or guttation fluid removal), a decreased susceptibility of diseased plants to midday wilt when evaporative demand was high.