A parenchyma-cell outgrowth that wholly or partly blocks a xylem vessel. It grows out from an axial or ray parenchyma cell through a pit in the vessel wall.
A balloon-like intrusion into the lumen of a xylem vessel, formed by enlargement of an adjacent living cell and its extrusion through a pit in the vessel wall.
Tyloses are outgrowths on parenchyma cells of xylem vessels (vascular tissue used for water and mineral transport throughout a plant). When the plant is stressed by 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 .....Found on http://en.wikipedia.org/wiki/Tylose
<plant biology> A parenchyma cell outgrowth that wholly or partly blocks a xylem vessel. It grows out from an axial or ray parenchyma cell through a pit in the vessel wall. ... (13 Nov 1997) ... Found on http://www.encyclo.co.uk/local/20973
(from the article `angiosperm`) Tyloses are balloonlike outgrowths of parenchyma cells that bulge through the circular bordered pits of vessel members and block water movement. The ... ...ring-porous trees are found in the north temperate areas of the world. In a number of species the vessels become occluded by cellular ingrowths ... ...Found on http://www.britannica.com/eb/a-z/t/99
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