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它以周皮代替表皮。The periderm of root replaces epidermis.

由中柱鞘产生侧根及周皮。The pericycle produces the latent roots and periderm.

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林奈木茎的表面，表皮层已被周皮所代替。The epidermis has been replaced by periderm on the surface of stem.

维管射线发达，周皮发育明显。The vascular ray was developed and the development of periderm was obvious.

具有次生结构，次生保护组织为周皮。It had secondary structure and the secondary protective tissue was periderm.

“薄皮”黑穗醋栗的薄壁组织细胞层内有“分泌结构”存在。In variety "Thin Skin"there is secretory structure in parenchyma by inner periderm.

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

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

已损伤的茎和根，以及进行次生生长的根茎中，表皮被次生层即周皮代替。In damaged stems and roots, and in those undergoing secondary growth, it is replaced by a secondary layer, the periderm.

结果表明，移山参主根结构由周皮和次生维管组织组成。The results showed that the taproots of transplanted P. ginseng plants consist of periderm and secondary vascular tissue.

浙贝母休眠解除后，鳞片近轴面表皮附近的几层细胞首先降解。Several layers of cortex parenchymal cells near the proximal periderm in scale degraded after releasing dormancy of the bulb.

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 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.

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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。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.

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。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.

周皮中的木栓细胞为近方形或不规则型，口径较大，数量多，且层叠排列，最外层的木栓细胞口径大，充满了空气。Periderm cork cells was nearly square or irregular, large caliber, large quantities, cascading arrangement. The caliber of the outermost layer of cork cells was large, filled the air.

西北中生界煤系烃源岩中普遍含有木栓质体，它来源于植物周皮的木栓化细胞壁。Suberinite occurs commonly in Mesozoic coal measures and terrestrial organic matter source rocks in Northwest China, which is formed from suberized cell walls, particularly in plant periderm.