形成层

次生生长主要是依靠维管形成层和木栓形成层的活动来完成。

The secondary growth mainly relied on activities of vascular cambium and cork cambium .

块根的次生木质部发达，导管周围存在额外形成层。

The secondary xylem of tuberous root is well developed , and there is supernumerary cambium around the vessels .

SDSPAGE电泳结果表明，在Q1RQ2的转变期出现一11.8kD的特异蛋白条带。此特异蛋白条带可能与形成层休眠期中各阶段的转变调节有关。

SDS_PAGE revealed a special " protein band of 11.8 kD in the transitional Q1_R_Q2 stages . This special " protein bands would be related to the cambial dormancy and to the regulation of the Q1_R_Q2 transition .

形成层细胞阶段和伸展生长阶段，POD主要分布在径壁上，尤其是细胞壁角隅处和初生纹孔场附近的细胞壁。

POD was mainly distributed in the radial walls of the cambial cells and expanding xylem cell , especially at the corner of cell wall and cell wall close to the primary pit field .

说明河北毛白杨形成层中存在CPI基因并能够有效表达，这为进一步研究该基因的抗虫功能奠定了良好的基础。

It would be suggested that CPI gene exist and express in the cambium of Populus tomentosa which could become the clue for cloning novel insect resistance gene .

创新点：1.首次测定了野生和栽培防风形成层以外的组织结构的颜色，建立野生和栽培品总色值Eab值域，用以鉴别防风不同的生长方式。

For the first time using a colorimeter on the organizational structure of wild and cultivated Fangfeng outer layer of color formation was measured to establish wild and cultivated products total value of Eab color range . 2 .

构树形成层的活动周期及其淀粉贮量的变化

Periodicity of cambial activity and changes of starch content in Broussonetia papyrifera

形成层的向顶分化像初生根伸长一样在继续进行。

Acropetal differentiation of the cambium layer continues as the primary root elongates .

杉木维管形成层发生发育的解剖学观察

Anatomical Observation on Development of Cambium in Cunninghamia lanceolata

原生木质部：初生木质部的成分，最早由原形成层形成。

Protoxylem The PRIMARY XYLEM elements that are formed from the procambium first .

早期的叶柄横切面呈马蹄形，与幼茎的结构相似，具有形成层。

The structure of petiole was similar to that of stem and possessed cambium .

生长龄不同，额外形成层、栓内层的宽度和细胞大小不同。

Roots are different in the width of supernumerary cambium and phelloderm and the cell .

黄檀属两种树木形成层的活动周期和次生韧皮部的季节变化

Periodicity of cambium activity and seasonal changes of the secondary phloem in two species of Dalbergia

初生分生组织由原表皮、基本分生组织和原形成层组成。初生分生组织的衍生细胞分化形成茎的初生结构，包括表皮、皮层、维管束、髓和髓射线。

The primary structure consisted of epidermis , cortex , vascular system , pith and pith ray .

拟分生组织分化的拟形成层形成维管组织结节；

Forming vascular tissue node ;

八种华北树木形成层季节活动及韧皮部与木质部形成的研究

Seasonal cambial activity and formation of phloem and xylem in eight forest tree species grown in North China

分析此现象可能与维管形成层细胞的分裂分化作用有关。

It was analysed that the phenomenon was related to the divide and differentiate of vascular cambium cell .

漆树茎干维管形成层的活动有明显的季节性，冬季休眠，春、夏季细胞分裂活动。

Cambium activity has obvious seasonal variations , vascular cambium dormant in the winter and active in spring and summer .

酯酶同工酶的酶谱和酶活性亦随形成层的活动状态发生变化。

The variability of esterase isozyme activity in the vascular tissues was in consistent with the periodicity of cambial activity .

杜仲形成层活动周期中多糖贮量和淀粉酶同工酶的变化

Changes of Polysaccharide Storage and Amylase Isozyme Activity in Relation to the Annual Cycle of Cambium Activity in Eucommia ulmoides Shoots

早春形成层恢复活动后，淀粉贮量逐渐减少直至消失。

Starch grains decreased progressively after cambial activity was resumed in early spring until they disappeared in all the stem tissues .

分别以胡萝卜子叶、下胚轴和直根形成层为外植体诱导出愈伤组织，并建立细胞悬浮系。

Calli were induced from cotyledons , hypocotyls , and taproot cambium of Daucus carrot . and cell suspension lines were established .

由形成层构成的细胞层，负责在根和叶之间运输食物和水分。

The flow of food and water between the roots and leaves is accomplished by layers of cells formed by the cambium .

在原生韧皮部启动分化之前，所有原形成层细胞均显示与原形成层起始细胞基本相似的超微结构特征：细胞核大，具电子致密的异染色质；

Prior to the initiation of protophloem differentiation , all of the procambial cells showed ultrastructural characteristics basically similar to the procambial initial .

白天树干阳面形成层温度高于阴面，夜间阴面温度略高于阳面；

Cambium temperature of SE bark was clearly higher than that of NU bark during daytime , but was slightly lower at night .

形成层活动周期中，过氧化物酶同工酶的酶谱和酶活性在形成层区域和木质部区域中变化最大。

In consistent with the periodicity of cambial activity , the variability of peroxidase isozyme activity as demonstrated by isozymography was most sign .

在春季芽膨大前，形成层带已经进入了恢复活动期。在芽展开后一周形成层进入活动期，细胞开始分裂，细胞层数也有所增加，同时分化出未成熟的韧皮部细胞。

However , initiation of cambial activity with cell proliferation and increase in immature phloem cells was about a week later than bud sprouting .

核桃试管嫩茎不定根的发育过程可分为4个阶段：（1）形成层细胞分裂；

The development of the adventitious roots of the in vitro stems could be divided into four stages :( 1 ) The cambium cells divided ;

形成层大多数导管植物中靠近边缘的分生组织，它形成植物细胞组成的平行的行列，导致产生二次组织、二次增生或长成软木。

A lateral meristem in most vascular plants that forms parallel rows of cells resulting in secondary tissues either as secondary growth or as cork .

到雌雄蕊分化期，穗、茎维管系统依靠原形成层束达到初步联络；

By the time of differentiation of the primordia of stamen and pistil , the bundles of the ear and the stem were connected through procambium .