二原型 meaning in Chinese
diarch
Examples
- We have observed the following characteristics of anatomical structure and development : ( 1 ) the primary roots belong to archetype and the lateral roots occur in the position toward the xylem of the vascular cylinder ; ( 2 ) the root endodermis consists of thicken casparian strips , and there are from two lo four layers parenchyma cells near the pericycle ; ( 3 ) the pith and resins canals are absent in the toots ; ( 4 ) secondary structure occurs in the root hair zone , and vascular cambium is formed from the parenchyma cells between the primary xylem and primary phloem ; ( 5 ) tanning materials are abundant in pericycle cells and phelloderm cells ; ( 6 ) sclereids are found in secondary phloem , and rays are rather rich in secondary xylem
结果表明：气生不定根具有以下结构特征和发育特点： ( 1 )根为二原型，侧根正对着木质部发生； ( 2 )幼根内皮层细胞具凯氏带加厚，维管柱内紧挨中柱鞘内侧具有2 ~ 4层大型薄壁细胞； ( 2 )根中无髓和树脂道； ( 4 )次生结构发生于根毛区，维管形成层由初生木质部和初生韧皮部之间的薄壁细胞转化形成； ( 5 )中柱鞘和栓内层细胞富含单宁类物质； ( 6 )次生韧皮部有石细胞，次生木质部射线发达。 - 1 . the study of comparative anatomy on the structure of seedlings of acorus tatarinowii and zantedeschia aethiopica suggested a . tatarinowii was more primitive " x " - shape mesarch haplostele , while z aethiopica atactostele ; the actinostele of root of the former was di - to octoarch , but the latter only di - to pentarch ; the pattern of endothecial wall thickening in a . tatarinowii was characteristic of five - face thickened and contained passage cell , while z . aethiopica four - faced thickened and known as casparian strip
通过对石菖蒲和马蹄莲幼苗结构的比较解剖学研究，发现石菖蒲幼苗的子叶节区下部为原始的中始式二原型的“工”字形的单中柱，而马蹄莲为散生中柱；石菖蒲根的维管柱为2 - 8原型星状中柱，马蹄莲为2 - 5原型星状中柱。石菖蒲根的内皮层细胞壁为马蹄形五面加厚；而马蹄莲为凯氏带四面加厚。