What is Guttation called? : Definition and Examples
Guttation is the process of secretion of water droplets from the pores of some vascular plants like grass.
Guttation is often confused with dew droplets that condense from the atmosphere onto the plant’s surface. In some herbaceous plants, such as Garden nasturtium (Tropaeolum majus), oats (Oat = Avena sativa), barley (Barley = Hordeum vulgare) and grouse (Colocasia esculenta) at the ends of veinlets at the edge of leaves
Under certain circumstances, droplets of liquid keep coming out. This happens when there is active absorption of water by the roots of plants, but little or no transpiration is taking place due to the high humidity of the atmosphere. Such a situation arises during hot days and cold nights.
When there is sufficient amount of absorbable water in the soil, but transpiration cannot take place, due to the positive root pressure, water (actually solution) in the form of dots on the edges of the leaves (hydathode = water stomata) The point of secretion of water (solution) through the passage of water is called guttation. This action usually takes place at night.
The liquid released in Guttation is actually an aqueous solution (not pure water) in which sugars, wicks, amino acids, organic acids, etc., are dissolved in water.
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| apparatus for performing guttation |
Bleeding – If any part of the stem of a plant is cut with a sharp knife, then the sap comes out from there. The loss of water occurs in the form of liquid but it is not pure water. Along with water, salts and organic solutes also come out in it. In this way up to 50 liters of juice can be extracted from a palm tree in a day.
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