protoxylem 中文意思是什麼
protoxylem
解釋
n. 名詞 【植物；植物學】原生木質部。-
4. the studies focused on the cnz of dianthus barbatus and saponaria offlcinalis seedlings applied two different vascular cylinder types, even through they both were " " - shape exarch and diarch haplostele, their patterns of protoxylem and m
此外，在商陸科的美洲商陸的子葉節區下部發現了一種具有雙大括號狀（ 「 { } 」 ）的維管柱類型。 -
It consists of the protoxylem ( formed first ) and metaxylem
包括原生木質部（最早形成的）和後生木質部。 -
Protoxylem the primary xylem elements that are formed from the procambium first
原生木質部：初生木質部的成分，最早由原形成層形成。 -
Annular thickening rings of thickening laid down on the inner wall of protoxylem vessels and tracheids
環狀加厚：原生木質部導管和管胞的內層環狀?厚。 -
In seed plants the protoxylem occurs at the innermost edge of the vascular bundles in stems, but external to the later - formed xylem in roots
在種子植物中，原生木質部發生在莖的維管束的最內方，但在根中，位於後生木質部的外方。
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