胚囊细胞

颠茄胚囊细胞原生质体的酶法分离和观察

Enzymatic isolation and observation of protoplasts of embryo sac elements of Atropa belladonna

取花柱为2～3mm长的幼蕾用压片法观察马铃薯胚囊母细胞的减数分裂，得到细胞结构完整、染色体形态清晰的分裂相。

By squash technique , the meiosis cells with chromosome dispersion phase were observed in EMC ( Embryo Sac Mother cell ) of potato . The ideal length of potato style was 2-3 mm .

平邑甜茶的无性胚囊原始细胞始于盛花期前后靠近合点端的珠心细胞，并很快发育为单核无性胚囊，盛花后5～7d的坐果初期形成无性的八核胚囊。

The aposporous initials , the nucellar cells in the chalazal end , developed during full blooming stage . Then it grew rapidly to unreduced embryo sac and formed 8-nuclei aposporous embryo sac , which happened 5 to 7 days after full bloom .

用压片法观察马铃薯胚囊母细胞减数分裂的研究

Study On The Meiosis Of EMC in Potato By Squash Technique

沙冬青成熟胚囊助细胞的超微结构观察

Ultrastructural Observations on the Synergid of the Mature Embryo Sac in Ammopiptanthus mongolicus

同时利用图像处理系统对胚囊成员细胞中钙沉淀颗粒的体密度和大小进行了定量分析。

Image processing system was employed to measure the volume density and the diameter of the deposits .

切片观察发现，丽2号胚囊母细胞在四核期已完全退化。

Observation by paraffin section showed that Lipeng No.2 embryo sac mother cells were almost entirely degenerated during megasporogenesis .

胚囊母细胞发育排成直线形的四分体，其中靠合点端的一个胚囊细胞将成为有功能的大孢子，但靠珠孔端的其余胚囊细胞则不发育。

The megaspore mother cell develops into a linear tetral and the megaspore at chalazal end will become a functional megaspore but the rest at the microphyte end will not develop .

胼胝质首先在这些有性胚囊起始细胞的细胞壁上积累，随着胚囊母细胞减数分裂的进行，在大孢子四分体的细胞壁上也有胼胝质沉积。

Callose was initially deposited in the walls of these sexual embryo sac cells , following the embryo sac mother cell via meiosis , callose also deposited in the megaspore tetrad walls .

成熟胚囊具七细胞，两极核在受精前融合。

The mature embryo sac contains seven cells and the two polar nuclei fused before fertilization .

紧连胚囊的珠心细胞衰退程度最大，细胞严重变形，酸性磷酸酶定位于细胞绝大部分结构中，但此时变形的细胞核则无酸性磷酸酶活性反应。

Enzyme activity was the highest in most components of the nucellar cells adjacent to the embryo sac where the degeneration of nucellar cells was the strongest , but it was not observed in the nuclei of the degenerated nucellar cells .

应用透射电镜研究了临近受精时天竺葵（PelargoniumhortorumBailey）胚囊中的卵细胞、助细胞和中央细胞的结构。

The constituent cells of the female germ unit in the embryo sac of Pelargonium hortorum Bailey just before fertilization were studied using transmission electron microscope .

蓼型（Polygonum-type）胚囊大孢子母细胞减数分裂时，其珠孔端细胞壁出现胼胝质荧光，并逐渐扩展到整个细胞壁。

Polygonum-type & During the process of megasporocyte meiosis , callose occurs first in the wall of megasporocyte from micropylar end , then gradually envelops the whole cell .

属薄珠心，胚囊形成时珠心细胞全部消失。

All nucellar cells disappear , when an embryo sac is ripe .

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 ;

合点与胚囊之间的珠心细胞特化或长形。

Some specialised nucellar cells between the vascular bundle and the chalazal end of embryo sac were often present and elongated , this might facilitate nutrient absorption of embryo sac through chalazal end .

大胚囊中的卵细胞受精发育可能是形成所谓中位胚（远离珠孔端胚）的主要原因。

The fertilization and development of egg cells in the large embryo sac might be the main cause of the formation of the so called " mid-seated embryo " ( the embryo far from the micropyle end ) .

小麦（Triticumaestivum）受精前成熟胚囊，除胚囊中央细胞的合点端细胞质中有酸性磷酸酶外，其余部位均未发现酸性磷酸酶。

No acid phosphatase activity was observed in the mature embryo sac of wheat ( Triticum aestivum ) except the chalazal cytoplasm of the central cell before fertilization .