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Plant Water Relations

Guttation

The loss of extra water in liquid drops from margins of leaves of herbaceous plants when root pressure is high and transpiration is low.

This process is very common during warm humid nights.

This process occurs in plants growing in high soil moisture.

It occurs through specialised pores called hydathodes present near the vein endings.

Nasturtium Leaf Showing Guttation at the Margin of Leaf

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	Introduction
	Absorption and Movement of Water
	Plasmolysis
	Permeability
	Water Potential
	Imbibition
	Availability of Water in the Soil
	Absorption of Water by Plants
	Passage of Water in Root or Pathway of Water in Root
	Theories for Ascent of Sap
	Guttation
	Transpiration
	Internal Plant Factors
	Role of Stomata in Transpiration
	Mechanism of Stomatal Action
	Summary
	Points to Remember
	Some Interesting Features
Animations
	Opening and Closing of a Stoma

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