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tracheid

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
tra·che·id  (trk-d, -kd)
n.
A cell in the xylem of vascular plants.

tra·chei·dal (tr-k-dl, -kdl) adj.

tracheid [ˈtreɪkɪɪd], tracheide
n
(Life Sciences & Allied Applications / Botany) Botany an element of xylem tissue consisting of an elongated lignified cell with tapering ends and large pits
[from trachea (in the sense: a vessel in a plant) + -id2]
tracheidal  [trəˈkiːɪdəl ˌtreɪkɪˈaɪdəl] adj

tracheid  (trk-d, -kd)
An elongated, water-conducting cell in xylem, one of the two kinds of tracheary elements. Tracheids have pits where the cell wall is modified into a thin membrane, across which water flows from tracheid to tracheid. The cells die when mature, leaving only their lignified cell walls. Tracheids are found in all vascular plants. Compare vessel element.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.tracheid - long tubular cell peculiar to xylem
vascular tissue - tissue that conducts water and nutrients through the plant body in higher plants
xylem - the woody part of plants: the supporting and water-conducting tissue, consisting primarily of tracheids and vessels


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34)) The use of TEM greatly extended LM observations, providing information on ultrastructural features of tracheid walls in the surface layers of boards where delignification from chemical pretreat-ment was greatest as well as of tracheid walls in deeper layers of cells, representing early to intermediate stages of delignification.
Tracheid to parenchyma pit pairs may have porose pit membranes on the tracheid side and nonporose pit membranes on the parenchyma side; thus degree of porosity in a section can represent the degree to which one primary wall or the other is pared away.
As the tracheid cytoplasm undergoes autolysis, the matrix materials in pit membranes of Metasequoia are removed from both torus and margo regions.
 
 
 
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