Question

Which one is true about guttation?

• A. It occurs through specialised pores called hydathodes.
• B. It occurs in herbaceous plants when root pressure is low and transpiration is high.
• C. It only occurs during day time.
• D. It occurs in plants growing under conditions of low soil moisture and high humidity.

Answer 1

The correct option is A It occurs through specialised pores called hydathodes.

Guttation refers to the exudation of water droplets from the margins and tips of leaves. During guttation, water is exuded from group of leaf cells through specialized openings or pores called hydathodes. It occurs in some angiosperms like garden nasturtium (Tropacolum) colocasia, tomato, etc., and is most noticeable where transpiration is suppressed and relative humidity is high such as during the night. It also takes place early in the morning, when soil moisture, root pressure and rate of water absorption is higher.