Question

Which one is true about guttation?

• A. It occurs through specialized 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 specialized pores called hydathodes.

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