细胞分裂

At 21 DAG, the newly established cambium cell started periclinal division, which would result in the production of phloem outwards and xylem inward. The 11-23 immature xylem cell layers beneath the surface continued their differentiation into mature xylem cells.

表面下7-11层未成熟木质部细胞在第7-14 DAG左右脱分化形成新的形成层。21 DAG，再生形成层开始平周分裂，产生新的韧皮部和木质部。11-23层未成熟木质部细胞继续分化为成熟木质部。

Nitrogen deficiency makes phycochrome turn pinkor pale,seedlings become slim and single line for not capable oflongitudinal division.

氮缺乏的症状是细胞色素体颜色浅红，紫菜幼苗苗体细长，不能进行纵分裂，始终保持单列细胞状态。

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。

The fluorescence silgnal on Thr11-phorphoslated histone H3 reached the strongest at early metaphase at the centromere punctated in the central of mitotic cell.

结果显示：在MCF-7细胞中，组蛋白H3 Thr11的磷酸化发生在早前期细胞染色体的着丝粒处，成点状分布，继而在早中期达到最高水平，并眨羔状集中在赤道板上，在有丝分裂后期开始脱磷酸化，并于末期完成脱磷酸化。

The embryogenic cell first divided into multicellular proembryos,then globular embryoid,pearshaped embryoid,long embryoid,scutiform embryoid and mature embryoid.

胚性细胞继续分裂形成多细胞原胚，经球形胚、梨形胚、长形胚、子叶分化期到成熟胚，其发生的胚状体与单子叶合子胚形成具有相似的过程。

The temperature affects the sustained time of secondary sporogenous cell split, the sustained time of microspore mother cell, formation speed and regular of male gametophyte.

温度影响次生造孢细胞持续分裂的时间、小孢子母细胞的持续时间及雄配子体的形成速度和整齐度。

In the anthers of China CMS lines,there is normaldifferentiation of anther walls,male sterility is characterizedby the abortion of sporogenous cells and microsporemother cells.

我国棉花细胞质雄性不育的败育时期主要集中在造孢细胞增殖时期和花粉母细胞减数分裂时期。

Embryo cells display a synchron cleavage rhythm during the cleavage stage, there is almost no gene transactivation, which is regulate and operated by the mRNAs and protein of oocyte.

卵裂阶段的胚胎细胞呈现同步化的分裂节律，鲜有基因转录活动，其发育由源自卵母细胞发生期间合成的蛋白质和mRNAs调控。

Chiasmata also help to hold homologs together until the start of anaphase, thus helping to ensure the correct distribution of chromosomes into the daughter nuclei.

交叉还可以使同源染色体始终在一起直到细胞减数分裂的后期，这样确保了染色体可以正确的进入子细胞。

LSD1 localizes on centrosomes during interphase and spindle poles during mitosis.

LSD1在细胞间期能够定位在中心体上，在细胞有丝分裂期定位在纺锤体两极。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。