Question

Hydathodes are present on the

• A. Upper surface of leaf
• B. Lower surface of leaf
• C. Tip of vein of leaf
• D. Base of veins of leaf

Answer 1

Answer: (C)

Tip of vein of leaf

Guttation is the loss of water in liquid form through hydathodes. Guttation is usually seen under environmental conditions when transpiration is low and soil is well watered. It occurs under the influence of positive root pressure. Hydathode pores located on the tip of leaf veins at the margins of leaves. Just below the hydathode pore are present a number of thin-walled loosely packed cells, called as epithem, which covers the blind or dead end of tracheids.