形成层

POⅠ and POⅡ presented only in the spring when cambium activity wasresumed.

POⅠ和POⅡ组同工酶只在春季形成层恢复活动时期存在。

With age adding, the area ratio of phloem and xylem decreases in Ch.smyrnioides . Differentiation of vascular cambium is active in 3～4 years root.

不同年龄的明党参主根随根龄的增加，韧皮部与木质部的比例减小，维管形成层在三至四年生根中活动最旺盛。

Inheritance of wood traits varies to a certain degree in tree stemfrom pith to near bark owing to the difference of cambium maturity.

由于树木形成层的成熟程度的差异，材性指标的遗传力在树干水平方向上随树龄有一定程度的变异。

Cambium lasts activity, the old old share with outer bark also drops ceaselessly, this one is called to fall cerebral cortex.

形成层持续活动，树皮外层的老旧部分也就不断地脱落，这一层被称为落皮层。

The vascular cambium is of perpetuity.

维管形成层是持久的

The Cork was consisted of five or six layer long cells. The secondary phloem occupied 46% of the diameter of root, and the parenchymas cell was abundant of the inclusions. The secondary xylem consisted of vessel, xylary radial ,and a little of xylary parenchyma cells. Some segment of hypha, swelled hypha, pelotons and conidiophore were colonied in cork and secondary phloem.

周皮由木栓层，木栓形成层和栓内层组成，其中木栓层由5～6 列长形细胞组成；维管组织中次生韧皮部所占根径的比例达46%，其薄壁细胞中内含物较丰富，次生木质部中分布有导管和木射线及少量木薄壁组织；在格木木栓层和次生韧皮部中分布有菌丝片段、膨大的菌丝和菌丝团及分生孢子。

Six days after inoculation, the cucumber root tip was slightly swollen and symmetrical root-knots were observed at the meristematic and elongation zones. Giant cells were differentiated by previous cambium cells in the center of the root; 10days after inoculation, symmetrical and secondary root-knots were observed at the root hair and upper zones. Vessels were separated by giant cells, around which protoxylem vessels were observed; l6days after inoculation, hypo-vascular tissue appeared earlier than normal; 20-30 days after inoculation, the vertical arrangement of vessels was disordered, shape was distorted and a new vascular tissue appeared in the cortex.

结果显示：接种后6 d的根尖分生区、伸长区出现膨大、对称的根结，根中心的原形成层细胞分化出巨型细胞；10 d在根毛区及以上部位出现既有对称又有偏于一侧的根结，周围有原生木质部导管出现，根结中巨型细胞阻断了导管；16 d次生维管组织提早出现；20~30 d导管纵向排列无序，形状扭曲，皮层中有新维管组织产生。

Lusty, obscene, boisterous, scrupulous, lying, diabolically truthful man that I am. Henry Miller

3由一系列的句子形成层进结构句子结构可以相同，也可以不同

The primary cambium is found in the stem and root between the phloem and xylem cells, and by division gives rise to the secondary phloem and xylem in woody dicotyledonous plants.

它纵贯于根，茎等器官的木质部和韧皮部之间，是具有分生能力的组织。通过形成层的分裂可以在木本的双子叶植物中形成次生木质部和次生韧皮部。

At higher melt temperature, the residence time and the intensity of flow field required to form filaments decreased.

在较高的熔体温度下，分散相形成层状结构所需要的停留时间和流场强度均降低。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了