The apical cell of the first leaf and of the first root originate almost at the same time after the embryo reaches to the 32 - celled phase 胚胎在32细胞阶段后，第一叶顶端细胞与第一根顶端细胞几乎同时发生。
Apical shapes were formed through electropolishing in the 1 - m naoh water solution at 2 volts with reciprocating the electrode array 尖端的形状通过电解抛光法构成， 2伏的电压在电极阵列和1m氢氧化钠溶液之间互换。
Leaves show bright yellow interveinal chlorosis , usually more acutely in apical areas and in younger leaves followed sometimes by bleaching and scorching 叶片脉间黄化，通常在叶尖和嫩叶上更为严重，有时转变成白化并枯黄。
The mitral - valve tenting area was also measured and used as a quantitative index for leaflet stiffening and apical displacement of leaflet coaptation 对二尖瓣幕状区也进行测量，作为定量参数评价发生瓣叶僵硬和瓣叶接合处顶部移位。
Calyptogen a layer of meristematic cells covering the root apical meristem in some plants ( e . g . grasses ) that gives rise to and maintains the root cap 根冠原：在一些植物中覆盖根顶端分生组织的一层具有分生能力的细胞，根冠原可以产生和维持根冠。
Primordium ( pl . primodia ) a collection of cells that differentiates into a specialized cell , tissue or organ , e . g . the apical shoot and apical root primordia of the embryo 原基：指能分化出特化的细胞、组织或器官的少数细胞，如胚芽原基和胚根原基。
The temination " of the deferent duct got into cloacal chamber a as apical segment . 1 . in ivtestis , seminiferous epithelium consisted of spermatogenous and sustentacular cell 在期精巢内，精细管包含有精原细胞、初级精母细胞、少量精子细胞和支持细胞。
In many plant species , includingarabidopsis , the growth of axillary meristems is inhibited by the primary inflorescence , a phenomenon generally known as apical dominance 在很多植物包括拟南芥中，侧芽的生长会被顶端花序的生长抑制，这就是植物特有的顶端优势现象。
Older leaves have ivory - tinted necrotic spots and shreaks coalescing into larger scorched areas ; some leaves show pale ( faded ) yellow chlorosis over whole surface of apical regions 缺钾的大麦叶片：老叶出现灰白色斑点，逐渐连在一起呈烧焦区域，有的叶片黄化一直到叶尖。
It was also observed that the “ inter - grain apical dominance ” in hybrid rice was stronger than its restorer , which might be one of the main reasons for low seed setting in hybrid rice combination 强势粒对弱势粒物质摄取能力的优势，可能是杂交稻籽粒结实率低下的重要原因之一。
