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Tyloses are outgrowths on parenchyma cells of xylem vessels (vascular tissue used for water and mineral transport throughout a plant). When the plant is introduced to a stress like drought or infection, tyloses will fall from the sides of the cells and "dam" up the vascular tissue to prevent further damage to the plant.
Tyloses can aid in the process of making sapwood into heartwood in some hardwood trees, especially in trees with larger vessels.[1] These blockages can be used in addition to gum plugs as soon as vessels become filled with air bubbles, and they help to form a stronger heartwood by slowing the progress of rot.[1]
- ^ a b Thomas, Peter. Trees: Their Natural History. Cambridge, UK: Cambridge UP, 2000. 242-43.
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