Question

Water conduction in stem of tree takes place by

• A. Duramen
• B. Sapwood
• C. Primary xylem
• D. All of the above

Answer 1

Answer: (B)

Sapwood

Sapwood is the younger, outermost wood in the growing tree. It is living wood and its principal functions are to conduct water from the roots to the leaves and to store up and give back according to the season the reserves prepared in the leaves. However, by the time they become competent to conduct water, all xylem tracheids and vessels have lost their cytoplasm and the cells are therefore functionally dead. All wood in a tree is first formed as sapwood. The more leaves a tree bears and the more vigorous its growth, the larger the volume of sapwood required.