xylem的例句大全

The results of anatomical observation indicated that the graft compatibility is better when the internal structure of scion and rootstock ( the size of cambium cell, xylem/ phloem and area of vascular) is similar;

另外，解剖结构观察发现，砧木与接穗一年生茎的形成层细胞大小、木韧比（木质部/韧皮部）及导管面积越相近，两者的亲和性越好。

The present results indicated the remarkable impact of salt stress on cambium cell activity and secondary xylem cell differentiation of both root and stem.

显微结构观测表明，盐胁迫对根和茎形成层细胞的活动和次生韧皮部和木质部细胞的分化产生显著影响。

Intrafascicular cambium ( fascicular cambium) The part of the VASCULAR CAMBIUM within the vascular between the xylem and phloem.

束中形成层：是位于木质部和韧皮部构成的维管束内的一部分维管形成层。

The primary xylem of root is diarch, of which developmental process contains primary growth and secondary growth. Secondary growth mainly depends on the activity of the vascular cambium and cork cambium.

其根为二原型，发育过程可分为初生生长和次生生长，成熟根的结构以次生结构为主，次生生长主要依靠维管形成层和木栓形成层的活动来完成。

With the progressive development of stem, the activity of vascular cambium began. The fascicular cambium differentiated into secondary xylem and secondary phloem, while the interfascicular cambium only differentiated into wide ray of parenchyma tissue.

随着茎的继续发育，维管形成层开始活动，由束中形成层产生次生韧皮部和次生木质部分子；而束间形成层仅产生薄壁细胞组成宽的射线。

Between primary xylem and primary phloem there are 2& 3 layers of parenchymatous cells, regularly or irregularly arranged, but no cambial zone can be recogni-zed.

初生木质部与初生韧皮部之间可见到2&3层排列规则或不规则的薄壁组织细胞，但是没有维管形成层的发生。

Supposing that ramie stalk is made up of two kinds of different material ( bast fibre and xylem). But their differences of mechanical properties are ignored.

提出了三者的力学建模方法。假定苎麻茎秆是由韧皮纤维、木质部两种异质材料复合而成的复合材料，不考虑它们的性能差别。

Ramie stalk is composed of bast fibre and xylem mainly.

苎麻茎秆主要由韧皮纤维、木质部等组成。

Centrifugal xylem differentiates from the center outwards, and a centrifugal inflorescence ( e.g. the dichasial cyme) is one in which the progression of flower opening is from the center to the periphery.

离心式的木质部分化是从中间开始的，离心式的花序中花开放的顺序是从中央到周围。

A reduction in the number of xylem and phloem poles in the central vascular cylinder in dl2 roots was observed and the diameter of cortical cell is also reduced.

突变体根中心维管束中木质部和韧皮部的数目减少，另外皮层细胞的直径也减小。

The Cohesion-Tension theory of water transportation in xylem requires a continuous column of water in the vessels.

根据内聚力&张力学说，水分在导管内运输时需要形成一个连续的水柱。

There are plenty of wood parenchyma in the secondary xylem, most of them are paratracheal parenchyma, belong to the aliform paratracheal parenchyma and vasicentric paratracheal parenchyma;

导管具单穿孔板，轴向木薄壁组织丰富，傍管型居多，为翼状傍管薄壁组织和环管薄壁组织；

While for older roots, there are periderm, secondary phloem, cambium, secondary xylem and primary xylem. In root, the duct caliber of xylem in Akebia quinata ( Thunb.) Decne.

老根由外向内依次为：周皮、次生韧皮部、形成层、次生木质部、初生木质部。在根中五叶木通木质部导管口径比三叶木通的大很多。