xylem 
xylem
Definition
xy·lem (zī′ləm, -lem)
noun
the woody vascular tissue of a plant, characterized by the presence of vessels or tracheids or both, fibers, and parenchyma, that conducts water and mineral salts in the stems, roots, and leaves and gives support to the softer tissues
Etymology: Ger < Gr xylon, wood
xylem
Usage Examples
Converse of object
- differentiate: We have cloned two cDNAs which encode the only members of the Myb class of transcription factors found in differentiating pine xylem.
Modifies a noun
- vessel: Movement in xylem vessels The cells which make up a xylem vessel are dead.
- formation: Analysis of xylem formation in pine by cDNA sequencing.
- tissue: The hollow tubes of xylem tissue are usually strengthened with lignin, the woody material we are familiar with in trees and shrubs.
- cell: This is turn sets up a concentration gradient across which water moves by osmosis out of the xylem cells and across the leaf.
- development: Additionally, xylem development, or xylogenesis, has a significant impact on the value of many crop species.
Noun used with modifier
- pine: We have cloned two cDNAs which encode the only members of the Myb class of transcription factors found in differentiating pine xylem.
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