原胚的

基本解释 (translations)

proembryonic

与原胚的相关的网络例句 [注：此内容来源于网络，仅供参考]

The other cells of the tetrad undergo degeneration. The mature embryo sac consists of an egg apparatus, a central cell, and 3 antipodal cells. The embryo sac is a monosporic Polygonum type. The zygote develops into a mature embryo going through proembryo, globular, heart, and torpedo stages.

胚囊发育类型为单孢子蓼型胚囊； 2胚的发育经过原胚、球形胚、心形胚和鱼雷胚等阶段发育为成熟胚；胚柄在球形胚时期最发达，但胚柄短小，只由3个扁平细胞组成，之后逐渐退化。

When the pollen tube comes into the micropyle and contact one of the synergids, both synergids do not show any sign of degeneration.

在二细胞原胚的顶细胞和基细胞中，均可观察到与合子中形态相似的双亲质体和线粒体。

There were the radicle polarity and the plumule polarity in differentiation of the first somatic embryogenesis.

此外，体细胞胚的发生和分裂是不同步的，往往在同一张切片上既可看到单个的胚性母细胞，又可见到二细胞、四细胞以致多细胞原胚并存的多样化原胚细胞群体。

GA3 and Z can promote germination of American ginseng seed, but cannot ignite the development of proem bryo.

结论GA3和Z是西洋参种子萌发促进因子，而不能启动原胚的起始发育。

The microscopical observation showed that embryonal suspensor masses developed firstly into early stage proembryos,then into late stage proembryos.

显微观察表明，来自原生质体的胚性胚柄细胞团(ESM：embryogenic suspensor mass)，经早期原胚(ESP：early stage proembryos)阶段形成了后期原胚(LSP：late stage proembryos)。

C Cotyledonary somatic embryos had more morphological variation than zygotic ones. We achieved somatic embryogenesis of Manchurian ash for the first time.

体细胞胚与合子胚的发生程序基本相同，都经历了原胚、心形胚、鱼雷形胚和子叶胚这几个典型发育时期。

We used transmission electron microscopy to study the ultrastructural changes in egg cell, zygote and two-celled proembryo of Beta vulgaris to provide information on the reproductive biology of angiosperms and related research into sugar beet.

为丰富被子植物生殖生物学资料，并为甜菜相关研究提供参考，应用透射电镜技术研究栽培甜菜卵细胞、合子和二细胞原胚的超微结构特征。

The friable embryogenic callus with small grains and without proembryo formation was screened in the process of continuous subcultures for 4~6 times on the medium with low content of sucrose from embryogenic cultures induced from immature embryos in litchi (Litchi chinensis Soon.). The well-scattered embryogenic cell suspensions could be rapidly established from the friable embryogenic callus in 2 liquid initial MS media respectively supplemented with 2,4-D 2 mg/L or 2,4-D 2 mg/L, KT1 mg/L and AgNO3 5 mg/L shaking at 100~120 r/min within 10-14 days.

荔枝幼胚诱导的胚性培养物在低糖条件下连续继代4~6次左右，可筛选到颗粒细小、不含原胚的松散型胚性愈伤组织；以这种松散的胚性愈伤组织作为起始材料，在附加2，4-D 2mg/L或2，4-D 2mg/L、KT1 mg/L、AgNO3 5mg/L的MS液体启动培养基上振荡培养（100~120 r/min）10~14 d，即可建立起分散性良好的胚性悬浮细胞系。

Then one ovule degenerated, the other which contained zygote kept on developing. Embryo undergone proembryo and globular embyo stage in early part of June. Heart stage embryo developed into torpedo stage, and meanwhile nuclear endosperm formed cellwalls in later June. Birch Fruit matured in July..

此后，一个胚珠退化，另一个含有受精卵的胚珠继续发育。6月上旬，白桦胚正经历原胚球形胚阶段。6月下旬核型胚乳细胞化，心形胚发育为鱼雷胚。7月，白桦果实成熟。

Polysomes change in number as "few-many-few-many" during the development of the egg, early zygote stage, zygote at dormancy, zygote in prophase of mitosis and two-celled proembryo in sugar beet, which indicates that such changes in metabolism as "low-high-low-high" activity may relate to the transformation from gametophyte to sporophyte generation.

根据上述结果可以得出，栽培甜菜从卵细胞成熟→合子初期→合子休眠期→合子分裂前期→二细胞原胚的超微结构变化中多聚核糖体的变化最为显著，表现为&少→多→少→多&的数量变化过程，反映出细胞代谢状态也经历了&弱→强→弱→强&的变化过程，这种变化趋势与配子体世代向孢子体世代转变有关。

与原胚的相关的网络解释 [注：此内容来源于网络，仅供参考]

metanephrogenic blastema：生后肾原基

(2)生后肾原基:生后肾原基(metanephrogenic blastema)是中肾嵴尾端的中胚层组织受输尿管芽的诱导而产生的. 中肾嵴的细胞密集并呈帽状包围在尿管芽的末端,即成为生后肾原基. 生后肾原基的外周部分演变为肾的被膜,内侧部分形成多个细胞团,

blastopore：胚孔

当囊胚继续发育时,会向内凹陷形成原肠胚(Gastula),向内凹陷的孔洞则称为胚孔(Blastopore). 软体动物即以此种方式发育,胚孔的地方形成嘴部,此称为原口(mouth-first)动物. 另一种动物在发育时胚孔成为肛门,而在另一端发育成嘴,

fate map：原基分布图

采用活体染色、碳粒标记及同位素标记等方法,均可将晚期囊胚或早期原肠胚分区标记,追踪被标记的细胞在形成原肠胚时,细胞迁移的方式及去向,从而明确在晚期囊胚或早期原肠胚的一定区域的细胞,将形成某个胚层或某个器官原基,在囊胚上制定出分区图,称原基分布图(fate map).

neurula：神经胚

此时期的胚胎称为神经胚(neurula). 2.脊索的形成:在原肠的背面中央出现一条纵行隆起,即脊索中胚层,以后这条隆起从原肠分离而形成脊索. 最初脊索的长度比神经管还要短些,后来脊索向前延伸越过神经管到吻的前端.

blastogenetic：胚原性的

blastodermal 胚盘的 | blastogenetic 胚原性的 | blastogenic 母细胞化的

blastogenetic：胚细胞样转变的 胚原性的

blastofmillet 粟瘟 | blastogenetic 胚细胞样转变的 胚原性的 | blastogenic 母细胞化的

blastogenic：母细胞化的

blastogenetic 胚细胞样转变的 胚原性的 | blastogenic 母细胞化的 | blastogenicfactor 母细胞形成因子

gastrocoel：原肠腔

最后形成2层细胞,在外面的细胞层称为外胚层(ectoderm),向内陷入的一层为内胚层(endoderm).内胚层所包围的腔将形成未来的肠腔,因此称为原肠腔(gastrocoel).原肠腔与外界相通的孔称为原口或胚孔(bastopore).

gastrula：肠胚

这时胚胎发育进入原肠期,胚胎称为原肠胚(gastrula). 那些内陷的植物极细胞叫做内胚层细胞,外包在胚体表面的动物极细胞称为外胚层细胞. 发生外包的动物极细胞后来也由原口处向胚内卷入,即中胚层细胞,其中一部分移到原肠背面形成脊索中胚层,

proembryo：原胚

胚在没有出现分化前的阶段,称原胚(proembryo). 由原胚发展为胚的过程,在双子叶植物和单子叶植物间是有差异的. 1.双子叶植物胚的发育 双子叶植物胚的发育,可以荠菜为例说明,合子经短暂休眠后、不均等地横向油裂为基细胞和顶端细胞.