英语释义

1. an outer layer of tissue especially a cortical protective layer of many roots and stems that typically consists of phellem, phellogen, and phelloderm

2. the outer layer of the epidermis of the skin especially of the embryo

片语

wound periderm[植]

periderm present周皮出现

periderm structure周皮结构

cork periderm木栓周皮

trauma periderm创伤周皮

secondary periderm[植]

periderm m周皮

英汉例句

• Results The secondary structure of the roots of Taxus chinensis var. mairei consisted of the periderm and vascular cylinder(stele). Axial and radial systems formed the secondary xylem of the roots.

  结果南方红豆杉根的次生结构由周皮和维管系统组成，次生木质部由轴向系统和径向系统两部分构成。

• The vascular ray was developed and the development of periderm was obvious.

  维管射线发达，周皮发育明显。

• In cultivated salvia miltiorrhiza roots light-colored periderm contained less layers of cells and low ratio of phloem to xylem compared with those in wild salvia rniltiorrhiza roots.

  栽培丹参根的周皮细胞层数少、色淡，韧皮部与木质部比值小，而野生丹参根的周皮细胞层数多、颜色重，韧皮部与木质部比值大。

• The epidermis has been replaced by periderm on the surface of stem.

  林奈木茎的表面，表皮层已被周皮所代替。

• The dorsal epidermis had three layers of cells at the 34th day of incubation. Pigmentation started to appear in the cells of periderm at the 40th day of incubation.

  背部表皮在孵化第34天出现三层细胞，第40天周皮层细胞中开始出现色素沉集。

• The formation of periderm is relatively late and cork cambium is come from the cortex cells which arenear endodermis.

  周皮发生较迟，其木栓形成层由紧靠内皮层的皮层细胞产生。

• The harmful effect of injecting chemical into tree on the xylem, bast, periderm and tree body was studied.

  本文就树干注入农药，对木质部、韧皮部及周皮和整个树体是否产生不良影响做出评价。

• The phellem of periderm and special morphological structure of sweet potato 「Lushu 780」 and 「Shengli 00」 play the role of a barrier to the spread and invasion of nematodes.

  甘薯品种「鲁薯780」和「胜利百号」的周皮木栓层和一些特殊形态结构是阻止该线虫侵入和扩展的屏障。