One of many raised pores in the stem of a woody plant that allows gas exchange between the atmosphere and the internal tissues.
- Both root system and trunk have lenticels (gas exchange pores) and aerenchyma (interconnected air-filled spaces), the former features comprising up to 51% of the volume of some mangrove roots.
- This tissue probably aided photosynthetic gas exchange much like the lenticels of modern trees.
- Finally, long-term morphological changes are induced, such as the formation of lenticels and aerenchyma to improve the oxygen permeability of the tissue.
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