原胚

盾片和胚芽鞘在授粉后3d的幼胚上同时出现，两者均直接由原胚分化，并非胚芽鞘从盾片发生。

In the young embryo at 3 DAP the scutellum and coleoptile appeared simultaneously directly from the proembryo . The coleoptile did not originate from the scutellum .

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。

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

到原胚期，Feulgen正反应恢复正常，核仁在全部过程中均为Feulgen负反应。

In proembryo stage , the Feulgen reaction is positive . The nucleolus is Feulgen negative all the time .

在原胚及早期幼胚发育过程中，胚原细胞核DNA含量恢复正常，RNA及酸性蛋白质含量均较丰富，特别是在胚原细胞内。

After formed proembryo and early young embryo , the content of DNA in the nuclei of the initials became normal . The RNA and acid protein contents are rich during the whole development , especially within the embryo initials .

单瓣紫花木槿开花第4d开始进行双受精，胚的发育历经球形原胚、心形胚、鱼雷胚、子叶胚及成熟胚各时期，胚乳核型，种子成熟后无胚乳；

The double fertilization is observed in the simple flower 4 days after blossom , and the mature embryo forms after stages of globular , heart-shaped , torpedo-shaped and cotyledon embryos .

结果表明：内源生长素IAA含量先降低，达到一个最低值，此时是荔枝体胚发生早期原胚Ⅰ阶段，随后就会逐渐上升，直到球形胚阶段时，达到一个最高值；

The results showed that the levels of endogenous IAA decreased from the stage of embryogenic callus to the stage of early proembryos I and then increased to the maximum at the stage of globular embryoids when the somatic embryogenesis occurred .

开花14～23d，胚珠中可见合子、2-细胞原胚、T-形原胚、多细胞原胚、小球胚及扩散至珠孔端的胚乳核。

The zygote , 2-cell proembryo , T-proembryo , multicellular proembryo , small globular embryo and endosperm nucleus diffusion to micropyle were observed in succession .

分化培养10d时形成多细胞原胚，20d时形成大量球形胚，30d时由具有一定分化的球形胚和少量心形胚组成。

10 days after being transferred to the differentiation medium , multi-cellular proembryos were formed , then great amount of globular embryos were observed at day 20 , specific differentiated globular embryos and a few heart-shaped embryos were formed at day 30 .

铁皮石斛原胚体液体悬浮培养条件

Study on the condition of pro-embryoids suspension culture of Dendrobium candidum

合子二分裂为2细胞原胚时，细胞中淀粉粒有所减少。

In 2-celled proembryo , the quantity of starch grains decreased .

原胚吸收溶蚀腔中的营养，生长发育。

Proembryo absorbed nutrition in corrosion cavity and grew , developed .

烟草合子与二胞原胚在离体培养中的发育

In vitro development of zygotes and two-celled proembryos in Nicotiana

接着进入原胚后期。

After that , late proembryo develop - ment starts .

3，胚发育属柳叶菜型。其发育历经原胚期、心形胚期、鱼雷胚期至成熟胚期。

The development of embryo conforms to the Onagrad type .

樟子松受精作用和原胚的选择

The Fertilization and Proembryo Choose of Pinus sylvestris var. mongolica

授粉后6天，胚乳游离核开始解体，比原胚败育早。

About 6 days after pollination , the hybrid endosperm began to degenerate .

在多细胞原胚及球形胚期具有单列或不规则排列的多细胞胚柄。

The multicellular proembryo and globular embryo possessed uniserial or untidy disposal multi-cellular suspensor .

2-细胞原胚阶段。

Z-cells are in the proembryo stage .

在老芒麦中，早期原胚之间存在淀粉粒含量的差异；

The starch grain content differed in the early stage of proembryos in the seeds of E.

应用微室饲养培养系统诱导水稻和小麦合子及早期原胚的生长

Growth of Zygotes and Early Proembryos in Rice and Wheat Using Microculture System with Feeder Cells

用同样的方法也成功地分离了韭菜的合子和早期原胚。

Egg cells , zygotes and proembryos of Allium tuberosum Roxb were isolated using an enzymatic digestion .

许多林木树种都有颈卵器，受精以后便产生许多原胚。

Many forest tree species have multiple archegonia which , after fertilization produce a number of proembryos .

原胚初期，每个原胚细胞及胚乳原生质中均积累较多脂类。

At early proembryo stage the proembryo cells and endosperm contained numerous lipid globules in their cytoplasm .

在早期原胚发育过程中胚体外一直包围有厚壁。原胚时期和子叶胚时期出现两次淀粉积累现象。

There were two peaks of starch accumulation at the stages of early proembryo and cotyledon embryo .

原胚经过多次分裂依次形成球形胚、心形胚、鱼雷形胚。

The division of the apical cell formed globular embryo , heart-shaped embryo and torpedo embryo successively .

观察到具细长胚柄的原胚及液泡化原胚等异常的胚胎类型；

A few abnormal embryos were observed , for instance , proembryos with elongated suspensor and vacuolated proembryos .

提高培养基的渗透压后，愈伤组织内形成大量的胚性胚柄细胞团和早期原胚。

Embryonal suspensor masses and early stage proembryos were formed from embryogenic callus cultured on high osmotic pressure medium .

在原胚及幼胚胚原细胞质中也呈现很弱的正反应。

The embryo initials and suspensor cells showed very weak Feulgen positive reaction in the proembryo and young embryo .

合子休眠期为15天左右，然后分裂形成二细胞原胚。

Dormant stage of the zygote is about 15 days long , and then divided into a two-cell proembryo .

授粉后7-8天，在胚囊中见到二细胞原胚及数个胚乳游离核。

There ware two cell proembryo and some endosperm free nucleuses in the embryo sac 7-8 days after pollination ;