Question

What is Duramen or heartwood?

Answer 1

Heartwood:

1. Heartwood is the central, dark-coloured non-functional part of the secondary xylem of an old stem.
2. Parenchymatous cells of the heartwood are dead.
3. The tracheary element is plugged by tyloses or gets filled with resins, gum, or tannins.
4. Heartwood is heavier and more durable.
5. Heartwood is less susceptible to the attack of pathogens and insects.