elemento de traqueida del protoxilema (Spanish, exact), 原生木部仮導管要素 (Japanese, exact)
Alternate IDs
None
Definition
A primary xylem tracheary element (PO:0025444) with predominately annular or helical secondary wall thickening that are the first formed tracheary elements (PO:0000290) at a particular location.
Source:ISBN:0471738433,
POC:Laura_Moore
Comment
In a given portion of primary xylem (PO:0005849), protoxylem tracheary elements are generally smaller in size, fewer in number, un-pitted and have less secondary wall material than metaxylem tracheary elements (PO:0025576).
Subset
None
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