游离核

CaM和类CyclinC蛋白在雌配子体游离核有丝分裂过程中起着重要作用。

It was found that CaM and Cyclin C-like protein played an important role in the free nuclei mitosis of female gametophyte .

新细胞质及其包着的游离核迁移到卵的基部。

The neocytoplasm and the engulfed free nuclei migrate towards the base of the egg .

结果表明，在胚乳游离核期和细胞化期，胚囊壁、细胞核和质膜上有ATP酶活性分布。

The results indicated that , at the coenocyte and cellularization stages , active ATPase was mainly distributed in an embryo sac wall , nucleus , and plasma membrane .

结构疏松，边界不清的NLB与粗面内质网和游离核蛋白体关系密切。

The NLB of loose structure was frequently associated with free ribosomes and cisternae of the rough endoplasmic reticulum .

在平均气温30℃时游离核的分裂周期为4.6h；

The division cycle of free nucleus is 4.6h at 30 ℃ .

早期的胚乳游离核以有丝分裂的方式增殖。

The early endosperm free nuclei proliferated in the form of karyomitosis .

胚乳游离核达30个左右时形成细胞。

Endosperm nuclei remain free until 30 or so .

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 .

合子与相应时期游离核胚乳中的脂类颗粒均较少。

Zygote and the corresponding free nuclear endosperm contained fewer diffused lipid globules .

包含游离核的合点端胚乳部分形成几个裂片。

The chalazal parts of the endosperm containing free nuclei forms several lobes .

游离核和体内核均为球形，直径5毫米。

The nuclei are 5 mm in diameter , spherical or semispherical in shape .

小麦的游离核与胚乳细胞要比水稻大。

The free nucleus and endosperm cells in wheat were larger than those in rice .

4月中旬雌球花迅速增长为胚乳游离核期。

Female cone elongates rapidly in middle April and at this time endosperm is in free nuclear stage .

2～5天形成大量的胚乳游离核；

In 2 ~ 5 days , a large amount of free nuclei of endosperm were rapidly formed ;

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 ;

当胚乳游离核为32个时，以自由生长细胞壁的方式进行胚乳细胞化。

Wall formation in the endosperm was initiated at the late heart-shaped embryo when there were 32 free nuclei .

同时，随着游离核的不断分裂，游离核膜状球体逐渐由椭圆形渐变为圆球形。

Meanwhile , with the constant division of free nucleus , membranous oval gradually changed from ball to spherical .

大孢子内部首先是充满均匀物质，随着发育，出现游离核，其后形成细胞结构。

First , the interior of macrospore is even material , then dissociative nucleus formed , followed cell structure formed .

当胚乳游离核数目增加到200至300时，胚乳以自由生长细胞壁的方式细胞化，胚乳细胞以典型的有丝分裂方式进一步增殖，增加细胞数目。

When the number of endosperm free nuclei reached 200 ~ 300 , the endosperm cellularized through free growing wall formation .

水稻游离核的分裂以无丝分裂为主，而小麦游离核的分裂以有丝分裂为主。

The primary division way of the free nucleus in rice was amitosis , While the one in wheat was mitosis .

合子准备分裂时胚囊中已经形成少数胚乳游离核。

A few of dissociated endosperm nucleus have been formed in the embryo sac when the zygocyte is ready to divide .

并分别比较了胚乳细胞化过程不同阶段胚乳游离核或胚乳细胞有丝分裂与分生组织细胞有丝分裂微管周期的差异。

And the differences in microtubular mitotic cycle between free nucleus or cell of endosperm and meristem are listed as well .

核期结束时，游离核间形成成膜体，产生细胞壁。

When the nuclear phase ended , the phragmoplast was formed between the free nucleus . Then the cell wall was developed .

在六月上旬，球形原胚处于末期时，胚乳游离核形成细胞壁。

When the tend period of the globular proembryo in early June , the cell wall of the endosperm free nuclei forms .

胚乳为核型胚乳。胚囊合点端胚乳保持游离核状态，成为胚乳舍点吸器。

The endosperm is of the Nuclear type , without cellularization the chalazal region of endosperm remains free nuclear and becomes a chalazal haustorium .

心形胚期，除合点端保持游离核胚乳吸器外，其余部分完成胚乳细胞化。

At the heart embryo stage , endosperm forms a free nuclei haustorium at the chalazal end , and finishes cellularization at other partion .

由于游离核之间出现了垂周壁，由一层胚乳游离核形成了一层无内切向壁的开放细胞。

Due to the anticlinal wall formation , a layer of free nuclei becomes a layer of open cells which lack the inner periclinal wall .

胚发育经过原胚、分化胚和成熟胚三个时期；胚乳发育经历游离核时期；

The embryo development went through three stages : proembryo 、 embryo differentiation and embryo maturation , and the endosperm experienced a free nuclear stage .

胚乳发育为核型，珠孔端胚乳细胞化，合点端保持游离核状态。

The endosperm development follows the nuclear type . The endosperm cells form at the micropylar end , and remain free nuclear phase at chalazal end .

其中一个具生殖核性质，以后的分裂多形成游离核，在胚状体的发育中最后被排除；

One of the nuclei having the nature of generative nucleus may divide and produce free nuclei which are eventually excluded in the course of embryoid development ;