What is guttation ? How it is affected by root pressure?

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transportinplants

#1

The process of exudation of liquid drops from the margins of the leaves through hydathodes is called guttation. (a) When root pressure is high and transpiration is low, herbaceous plants may loose small quantities of liquid water in the form of drops, (b) The rate of guttation increases with the decrease in root pressure due to less absorption of water.