What happens when a tree is wounded according to the CODIT theory?

According to the CODIT (Compartmentalization of Decay in Trees) theory, when a tree is wounded, it responds by forming barriers in the wood to wall off the injury. This process involves the tree compartmentalizing the damaged area to minimize the spread of decay and protect healthy tissues. The barriers consist of layers of defense, created by the living tissues of the tree, which prevent pathogens and decay fungi from invading the healthy portions. This natural defense mechanism enables the tree to maintain its structural integrity and continue growing despite the injury.

The other options do not accurately represent the fundamental principles of the CODIT theory. Nutrient absorption is influenced by root systems and not directly related to wound response, while the idea of removing decay is not a direct action but rather an outcome of the tree's compartmentalization. Strengthening the surrounding bark may occur through general growth processes but is not a specific response to injury as described in CODIT.