维管束鞘

石蜡切片观察表明，愈伤组织是由维管束鞘薄壁细胞分裂而来。

According to the observations of the paraffin section indicated that the callus were originates from the parenchyma cells of the vascular bundle sheath .

细叶型的叶上表皮气孔强烈下陷，叶肉无栅栏组织和海绵组织的区别，由木质化或栓质化细胞形成维管束鞘。

Whereas , the stomas of the upper epidermis of the thin-leave type settle strongly , there are no dividing between palisade tissue and spongy tissue in the diachyma , the vascular bundle sheath consists of lignification and suberin cells .

离体的维管束鞘细胞束也有一定的CO2固定能力。

Isolated bundle sheath cells alsoshowed a certain capacity of CO_2 fixation .

尽管薇甘菊叶片为典型C3植物特征，结果发现了茎以及主叶脉内存在类似C4途径的、具有丰富叶绿体的维管束鞘结构。

Although leaf photosynthesis of this weed is of the C3 type , a C4-like vascular bundle full of chlorophyll was observed in the main vein of the leaf and young stems .

采用半薄切片和组织化学方法研究了木立芦荟（Aloearborescens）叶内维管束的发育过程，并着重于维管束鞘细胞和芦荟素细胞的来源及组织类型。

Semi-thin sectioning and the method commonly referred in histochemistry were used to study the development of vascular bundles in Aloe arborescens leaves with emphasis on the origins and tissue types of vascular bundle sheath cells and aloin-containing cells .

强株系CTV-3侵染墨西哥酸橙后，脉明明显的区域，有63%的维管束鞘厚壁组织细胞退化，脉明不明显的区域仅有34%～48%的退化；

A severe CTV isolate , CTV-3 infected Mexican lime had 63 % of vascular bundle sheath cell degraded at the prominent vein clearing area and 34 % - 48 % in the less prominent areas .

它显示出两个发育完全之维管束鞘位于维管束周围。

It shows two well-developed sheaths around the vascular bundles .

叶的维管束鞘细胞含有许多叶绿体和淀粉粒，可以断定它是四碳植物。

The cells of leaf bundle sheath contain numerous chloroplasts and starch grains .

叶片具有同形的叶肉组织，叶脉维管束鞘具2层细胞。

The mesophyll of the lamina is homogeneous , and the vascular bundle sheath of the lamina has 2 layers of cells .

而维管束鞘细胞则来源于基本分生组织，属于基本组织的范畴，与维管束不同源。

The vascular bundle cells stemmed from ground meristem , belonging to ground tissue and differing from vascular bundle sheaths in origin .

主脉的愈伤组织主要由维管束鞘薄壁细胞，以及与其邻接的一些栅栏组织细胞和韧皮部的薄壁细胞分裂而来。

The origin of the midvein calli developed mainly from the vascular cylinder , the palisade tissues and the phloem parenchyma cells .

结果表明，在叶内原形成层束分化成维管束初期，原形成层束外侧的一层细胞发育成维管束鞘。

The results showed : cells rounded the procambium bundle differentiated into bundle sheath at the initial stage of procambium bundle developing into vascular bundle .

维管束鞘：在被子植物叶中，围绕维管束的通常是一层薄壁或厚壁细胞。

Bundle sheath the ring of parenchymatous or sclerenchymatous tissue , usually one cell thick , that surrounds the vascular bundle in an angiosperm leaf .

小叶脉的维管束鞘细胞中也有很多的金颗粒标记，金颗粒主要分布在叶绿体、细胞质及细胞壁中。

Some were also located in the cells of vascular bundle sheath of the fine veins , mainly distributed over the chloroplasts , cytoplasm and cell wall .

甘蔗栽培品种的更替与光合膜关系的研究&Ⅲ.品种更替与叶片维管束鞘细胞的关系

STUDIES ON THE RELATIONSHIP BETWEEN THE EVOLUTIONAL SUCCESSION OF SUGARCANE VARIETIES AND THEIR PHOTOSYNTHETIC MEMBRANES ⅲ . The relationship between the evolutional succession and the leaf bundle sheath cells

变量分析表明：它们之间的维管束鞘细胞的横剖面积，在不同叶层之间，差异是极显著的；

An analysis of variance indicated the most significant difference was observed among the cross-section areas of the bundle sheath cells between two large size vascular bundles in different leaf layers .

芦荟素在叶的同化组织细胞的质体中合成，通过质外体途径转运到维管束鞘细胞，由其胞间连丝运送到大型薄壁细胞内贮存。

Aloin was produced in the plastids of the assimilating tissue , it reached the vascular bundle sheath by apoplastic endoplasmic , stored , finally in the large parenchymatous cells by means of plasmodesmata .

维管束鞘细胞和平脉叶肉细胞中叶绿体数目较少、体积小、基质较稀疏，叶绿体基粒及片层结构较简单。

The chloroplasts in vascular bundle sheath cells ( VB ) and paraveinal mesophyll cells ( PVM ) are small in number and in size , thin with stroma , and simple with grana structure .

它显示出在维管束周围的鞘状构造。

It shows one sheath around the vascular bundles .

维管束由维管束鞘、木质部、韧皮部和大型薄壁细胞组成。

The vascular bundle consists of vascular bundle sheath , xylem , phloem and big parenchymatous cells .

总而言之，诺克斯的建议考虑不周，显示幼稚。它并没有显示出在维管束周围的鞘状构造。

In short , Knox 's proposal was ill conceived and naively made . It does not show sheaths around the vascular bundles .

它并没有显示出在维管束周围的鞘状构造。原形成层（原形成层束）：形成维管组织的一层细胞。

It does not show sheaths around the vascular bundles . Procambium ( procambial strand ) The layer of cells that gives rise to the vascular tissue .

叶片中维管束数目大多为奇数，叶脉维管束鞘由薄壁细胞组成；

The number of the vascular bundle is usually odd , and the vascular bundle sheath is composed of parenchyma cells ;