Air Embolism - in Vascular Plants

In Vascular Plants

Air embolisms generally occur in the xylem of vascular plants because a fall in hydraulic conductivity results in cavitation. Possible causes of falling hydraulic conductivity include water stress and the freeze-thaw cycle.

A number of physiological adaptations serve to prevent embolisms. These include variations in the length and diameter of vessel elements in different parts of the plant; and the ability to reduce transpiration by closing off leaf stomata.

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