中柱鞘

中柱鞘具1&3层薄壁细胞。

The pericycle has 1 & 3 layers of parenchymatous cells .

由中柱鞘产生侧根及周皮。

The pericycle produces the latent roots and periderm .

1启动期（0～3d），根尖分生组织细胞、中柱鞘细胞起动分裂。

Root meristematic cells and pericyclic cells first divided .

其木栓形成层由中柱鞘细胞恢复分裂能力而形成。

The cork cambium originated from pericyclic cells that resumed their dividing capabilities .

茎的中柱鞘纤维成环；

Pericycle fibers in the stem were circular ;

内皮层凯氏带不明显，中柱鞘由一层细胞构成。

The pericycle consists of a uniseriate cylinder of cells and the casparian strips of endodermis are not very apparent .

但中柱鞘细胞在形成木栓形成层前，先进行平周分裂，形成了由多层细胞组成的中柱鞘细胞环。

However , before forming the cork cambium , pericyclic cells produced many layers pericyclic parenchyma cells by periclinal division .

侧根原基由木质部放射棱顶端中柱鞘细胞发生，根尖及成熟结构与主根相同。

Lateral root primordia are initiated in the pericycle opposite the protoxylem groups . The development and mature structure of lateral root-tip are the same as main root .

因此，北柴胡根的次生结构从外到内由周皮、中柱鞘薄壁细胞环和次生维管组织组成。

Therefore , the secondary structure included periderm , pericyclic parenchyma tissue and secondary vascular tissue from the outside to the inside of taproots of Bupleurum chinense DC .

匍匐茎中柱鞘纤维呈几乎连续环带的性状，可能有利于其延伸来寻找顶芽的着生点。

Pericycle fibers in the stolon nearly forming a ring is a secondary character that is usefull for the extension of the terminal bud of the stolon and finding a suitable point to develop .

在根的初生结构中，柴胡皂苷分布于表皮、皮层、中柱鞘、初生韧皮部及原生木质部的薄壁组织细胞内，其中中柱鞘和韧皮部是主要的分布部位。

In the primary structure , saikosaponin was distributed in parenchyma cells of the epidermis , cortex , pericycle , primary phloem and protoxylem , among which pericycle and primary phloem were the main storage site .

单中柱：原生中柱的一种类型，是由韧皮部、中柱鞘和内皮层包围着内方的木质部构成的实心中柱。

Haplostele A type of protostele having a solid strand of stele with the xylem on the inside encircled by phloem , pericycle , and endodermis .

中柱包括从原形成层衍生而来的全部初生组织，由中柱鞘、韧质部和木质部组成。

The stele includes all primary tissues derived from the procambium consists of pericycle , phloem and xylem .

不同杨树品系韧皮部和木质部的还原糖含量与被害株率没有相关性。中柱包括从原形成层衍生而来的全部初生组织，由中柱鞘、韧质部和木质部组成。

The correlation between the reducing sugar content in phloem and xylem and the ratio of damaged trees was not close . The stele includes all primary tissues derived from the procambium consists of pericycle , phloem and xylem .