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Qu'est-ce (qui) est xylem - définition
ONE OF THE TWO TYPES OF TRANSPORT TISSUE IN VASCULAR PLANTS
Transpiration pull; Transpirational pull; Xylem vessel element; Cohesion-tension theory; Cohesion tension; Xylem development; Secondary xylem; Metaxylem; Protoxylem; Woody tissue; Secondary wood; Endarch; Centrarch; Mesarch; Tracheary element; Xylem cell
Xylem
·noun That portion of a fibrovascular bundle which has developed, or will develop, into wood cells;
- distinguished from phloem.
xylem
['z??l?m]
¦ noun Botany the vascular tissue in plants which conducts water and dissolved nutrients upwards from the root and also helps to form the woody element in the stem.
Origin
C19: from Gk xulon 'wood' + the passive suffix -ema.
Xylem
Xylem is one of the two types of transport tissue in vascular plants, the other being phloem. The basic function of xylem is to transport water from roots to stems and leaves, but it also transports nutrients.
Wikipédia
Xylem
Xylem is one of the two types of transport tissue in vascular plants, the other being phloem. The basic function of xylem is to transport water from roots to stems and leaves, but it also transports nutrients. The word xylem is derived from the Ancient Greek word ξύλον (xylon), meaning "wood"; the best-known xylem tissue is wood, though it is found throughout a plant. The term was introduced by Carl Nägeli in 1858.
