形成层

The results showed that POD activity increased at first and then decreased in the skin and flesh of root. The peak occurred at 40 d and 60 d in the skin and flesh, respectively. POD activity in the skin was higher than that in the flesh at 30 d and then contrary results were observed. The higher POD activity was, the more POD isoenzyme was. The pattern of POD isoenzymes was different between skin and flesh at different vegetative growth stages. POD isoenzymes in the skin were composed of five monomers and four dimers while five dimers or two monomers, two dimers and one tetramer in the flesh. POD isoenzymes in the root were mainly acidic. POD localized mainly in the cell walls of periderm, cambium, xylem ray, xylem vessels and primary xylem.

结果显示，心里美萝卜营养生长期肉质根的皮和肉中POD活性均先升高后降低，分别在播种后第40 d和60 d出现峰值，30 d时皮中POD活性高于肉，之后则相反，酶活性最高时同工酶数目也最多，不同时期，皮和肉中同工酶种类不同；皮中POD同工酶由5个单体和4个二聚体组成，而肉中由5个二聚体或2个单体、2个二聚体和1个四聚体组成，均以酸性同工酶为主；组化定位显示POD主要分布在肉质根的周皮、形成层、木射线、木质部导管和肉的初生木质部等的细胞壁附近。

The variation of polysaccharide content was related to the periodicity of cambial activity.

多糖贮量的变化和形成层的活动周期有关。

Phellem A protective layer of radically arranged cells produced to the outside of the PHELLOGEN.

木栓：指由木栓形成层外侧的一系列细胞所组成的保护层。

Botany A nonliving, water-resistant protective tissue that is formed on the outside of the cork cambium in the woody stems and roots of many seed plants.Also called In this sense, also called phellem

栓皮：一种无生命的、防水保护纤维，形成于许多种子植物的木质茎和根软木形成层的外部也作在此意义上也可称作 phellem

Botany A nonliving , water resistant protective tissue that is formed on the outside of the cork cambium in the woody stems and roots of many seed plants Also called In this sense , also called phellem

栓皮：一种无生命的，防水保护纤维，形成于许多种子植物的木质茎和根软木形成层的外部也作

The cells of the phellogengive rise externally to the PHELLEMand internally to the PHELLODERM.

木栓形成层的细胞向外产生木栓层，向内产生栓内层。

The cells of the phelloderm arise in radial columns from the phellogen, and this distinguishes them from the primary cortex.

栓内层细胞是起源于木栓形成层，显然不同于初生皮层。

Bark The outermost tissue of the stem and roots in woody plants, on the outside of the phellogen.

bark 树皮：木本植物中的茎或根中木栓形成层外方的全部组织，称为树皮。

Phellogen(cork cambium;pefiderm cambium) A subepidermal layer of cells forming a 1ateral meristem that arises following the onset of secondary growth.

木栓形成层：由表皮下层的细胞形成的侧生分生组织，在次生生长开始后产生。

In roots it may also be called plerome.

原形成层在根中也被可称为中柱原。

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