生殖细胞

Bicoloratus raised in an aquaculture plant has been made through histological methods. The results show that there are about 2 primordial germ cells present in the newly hatched larva, and are located between the gut and the mesonephric duct.

结果显示：刚孵化石鲽的原生殖细胞数量在2个左右，位于体腔肠管与中肾管之间的背肠系膜附近，至孵化3d后数量增至8个左右，之后PGCs开始迁移。

The Vg-negative reaction of the triploid female rainbow trout could not provide full evidence for the impossibility of liver to synthesize Vg. That Vg was not synthesized resulted from insufficient estradiol due to the retardation of ovaries development, the un-differentiation of follicular cells and the lost interaction of germ cell and somatic cells. It could be concluded from yolk genesis that the shortage of female triploid rainbow trout's Vg resulted from the abortive ooecium, but did not result in sterility.

由于三倍体雌性虹鳟卵巢发育受阻，无滤泡细胞分化，生殖细胞与体细胞的互作缺失，不能分泌足量的17β-E2以诱导Vg的合成，因而肝脏的Vg阴性并不能说明肝脏不具备合成Vg的能力，从卵黄发生的角度分析，卵黄蛋白原的缺乏不是导致三倍体虹鳟雌性不育的原因，而是其卵泡败育的结果。

In particular, it has remained unclear how oogamy arose from isogamy, a more simple form of sex in which ery similar reproductie cells take on different "mating types" but do not differentiate as distinct sperm and egg.

尤其是异配生殖如何由同配生殖转化而来，我们对此还懵懵懂懂。同配生殖是一种更为简单的结合形式，在此过程中，非常相似的生殖细胞不管三七二十一地就与不同的配子结合，都不分这些配子是&公&是&母&。

In order to approach this question, we used a cross-reacting antibody against the most conserved germline marker Vasa to stain the panoistic ovarioles dissected from the adult German cockroach Blattella germanica .

为了研究这个问题，我们用一个可辨识最保守之生殖细胞标记分子Vasa的高度交叉反应性抗体对德国蜚蠊的无营养细胞型微卵管进行免疫染色。

The analysis shows that under heat stress, meiocytes degenerate while tetrad cell dispersion fails at microspore formation phase. During pollen maturation phase, loss of orientation of reproductive cells, abnormal vacuolization of tapetal cells, paramorphia or abortion of anther walls and pollens are observed under heat stress.

结果表明，受高温胁迫后，在小孢子形成阶段，水稻花粉母细胞发育异常、四分体无法适时分散；在花粉粒成熟阶段，水稻生殖细胞失去正确的排列方向、绒毡层细胞发生非正常分解、花药壁和花粉粒发生形态异常并出现败育。

It is proved by ultrastructural observations that few plastids and abundednt mitochondria were ever presenting in the generative cell of Pisum sativum from its formation to maturation.

在豌豆中证明了生殖细胞自形成直至成熟花粉时，始终存在少量质体和较多的线粒体。

It was proved by ultrastructural observations that few plastids and abundent mitochondria were ever present in the generative cell of Pisum sativum L.

超微结构的研究证明，豌豆（Pisum sativum L。）生殖细胞自形成直至成熟花粉时期，始终存在少量质体和较多的线粒体。

Pisum sativum ; Generative cell ; Plastid inheritance

豌豆；生殖细胞；质体遗传

PLAP can be applied for differentiating diagnosis of germinomas from other tumors.

PLAP可用于生殖细胞肿瘤与其他肿瘤鉴别诊断。

The mutation potential of ethephon was by investigated the micronucleus test of bone marrow polychromatophilic erythroblastsPCE cells and sperm shape abnormality test in mice.

为测定乙烯利对人体健康的影响，采用小鼠骨髓细胞微核试验和小鼠精子畸形试验分别检测了乙烯利对小鼠体细胞和生殖细胞的致突变性。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。