The increase in cells number derived from primary thickening meristem and in cells volume make the rhizome thicken rapidly.
初生增厚分生组织细胞不断向内分裂和其衍生细胞的体积增大，是根状茎能迅速增粗的主要原因。
There is primary thickening meristem at the lower part of rhizome tip under protoderm.
根状茎顶端的原分生组织由鳞片包被，顶端下方的原表皮内存在初生增厚分生组织。
There were some important discovery in structure character as the follows: in sarcotesta that materials making experiment, all possessed the structure of bandshape and like primary thickening meristem; sarcotesta possessed amphivasal vascular bundle and the vascular bundle that xylem distribute in two sied of phloem on inside and outside were discovered; new structure patterns of root that possessed more plentiful secondary cortex etc.
其中，发现外种皮中均具明显的似初生增厚分生组织的带状结构；且发现在外种皮的组织中具有双木维管束及周木维管束，发现了苏铁科植物根具较丰富的次生皮层等新的结构形式；在对比材料鳞秕泽米铁的羽片中发现了导管，这些在苏铁植物方面过去均未见有报道。
Studies on the cell division of primary thickening meristem and apical meristem of the shoot apex in sugarcane
甘蔗茎尖初生增粗分生组织与顶端分生组织细胞分裂研究
Cell divisions were diffused almost in the whole axis, and no primary thickening meristem occured.
结果表明：番红花球茎增粗生长是由于细胞分裂与细胞体积增大。细胞分裂几乎分散在整个轴上，没有初生增粗分生组织。
Anatomical structure of shoot apex on Angelica sinensis Genesis and Differentation of Primary Thickening Meristem in Shoot Apex of Sugarcane
当归营养苗端的解剖学观察甘蔗茎尖初生增粗分生组织的发生和分化活动
In the early stage, the cellular group of the primordium will differentiate into both of interior and exterior tissues, namely, exterior parenchyma and the saccular primary thickening meristem (PTM) adjacent to the inside as well as interior parenchyma.
初期，原基细细胞团分化为内外两部分组织：外侧为薄壁组织及紧邻其内的囊状初生加厚分生组织，内侧为薄壁组织。
In the primary thickening process of the Phyllostachys edulis shoot bud, the contributions of different tissues were arranged as follows: pith meristem vascular tissue ground tissue cortex + epidermis. The main factor of the primary thickening process is the proliferation and the increase of pith cells.
在笋芽的初生增粗生长过程中，各组织的贡献率自大到小为：髓分生组织维管组织基本组织皮层+表皮，髓分生组织细胞的增殖与增大是竹笋进行初生增粗生长的主要因素。
Results: Of the 20 primary tracheal tumors, 1 was benign, showing intraluminal smooth nodule with narrow base and without tracheal wall thickening.
结果：20例原发气管肿瘤，良性1例，CT表现为腔内光滑结节，窄基底，气管壁无增厚；
The hypoeutectic structure of the test sample water-quenched at and above eutectic temperature is showed. During cooling process there are thickening processes of primary dendritic α and Si phases.
研究表明：在共晶温度以上（包括共晶温度）的激冷试件中，呈现亚共晶组织，存在着初生α和共晶硅的粗化过程；
The anomalous secondary thickening was studied in the root of medicinal species of Achyranthes bidentata B1. The primary and early secondary structures are similar to those of most herbs of the dicotyledons.
药用植物川牛膝根中异常次生结构的发育解剖学研究本文报道了药用植物牛滕根的异常次生生长。其初生结构和早期的次生结构类似于一般的草本双子叶植物根。
Cortical microtubule arrays were predominant in the primary thickening meristem of S. spontaneum, while other three arrays were rarely observed. It may be one of the reasons why S. spontaneum has a narrower stem than other cultivars.
在割手密初生增粗分生组织细胞中观察到的大多数是周质微管列阵，很少观察到其它3种典型的微管列阵，这可能这是割手密茎较小的原因之一。