What type of wood do trees produce to provide stability when they lean?

Trees produce reaction wood in response to mechanical stress, such as leaning due to wind or uneven weight distribution. This specialized wood helps provide additional support and stability, allowing trees to maintain their structure and grow upright.

In hardwood species, reaction wood is typically referred to as tension wood and is characterized by the formation of cellulose-rich fibers that strengthen the lean. In contrast, conifer species (softwoods) form compression wood, which serves a similar purpose but has a different structural composition.

Understanding reaction wood is crucial for arborists as it influences the tree's health and stability, particularly in managing and maintaining trees in urban environments or areas prone to high winds or soil instability. Recognizing the presence of reaction wood can also inform decisions regarding pruning, support systems, and overall care.