Question

Guttation usually occur in a well watered herbaceous plant and well drained soil during

• A. Early morning hours
• B. Evening hours
• C. Noon hours
• D. Day hours

Answer 1

The correct option is A Early morning hours

Guttation is the loss of water through water stomata (hydathodes) in the form of the dilute solution of mineral salts. When the absorption of water exceeds transpiration i.e., when plants are absorbing water actively, a positive root pressure is built up under the influence of which excess water simply oozes out through the dead ends of xylem tracheids and vessels. This usually happens during early morning hours when transpiration is low.