lenticellit

Lenticellit are small, raised pores found on the bark of woody stems and roots of plants. They are essentially openings in the bark that facilitate gas exchange between the internal tissues of the plant and the external atmosphere. This gas exchange is crucial for respiration, allowing oxygen to enter and carbon dioxide to exit. Lenticellit are also involved in the release of volatile organic compounds from the plant.

Structurally, lenticellit are composed of loosely packed, unsuberized cells called complementary cells. These cells are produced by the underlying phellogen (cork cambium) and break through the cork layer, forming the visible pore. The number, size, and arrangement of lenticellit vary significantly among different plant species, and can even differ on various parts of the same plant. Their appearance can range from small dots to larger, elongated slits or patches.

In some species, lenticellit are more prominent and can be a distinguishing characteristic for identification. For instance, birch trees are well-known for their conspicuous lenticellit. While primarily serving gas exchange, lenticellit can also be points of entry for pathogens if the surrounding tissues are damaged. Their presence is a normal and vital aspect of woody plant anatomy.