nucellus

The nucellus cells could differentiate the sexual cell under quite low concentration of exogenous hormones .

珠心细胞在低浓度的外源激素条件下可以分化性细胞；

Soluble polysaccharides was observed in the nucellus cells .

珠心细胞中只见到可溶性多糖。

In vitro culture of nucelli in 3 species of citrus subfamily plants

3种柑橘亚科植物的珠心组织培养

The cells of the integument and nucellus of some plants form perfectly normal embryos .

某些植物的珠被和珠心细胞形成完全正常的胚。

Food materials may be stored in a special tissue derived from the nucellus , called the perisperm .

营养物质可以贮藏于由珠心产生的一种特殊组织，叫外胚乳。

Comparative Studies on the Behavior of Growing of Nucellus between Monoembryonic and Polyembryonic Rice

单多胚水稻珠心组织消长变化的比较研究

The archesporial cell below nucellus epiderm functions directly as the megaspore mother cell .

珠心表皮下的雌性孢原直接发育为大孢子母细胞。

Intercellular migration of protoplasm and its relation to the development of embryo sac in nucellus of Wheat

小麦珠心组织中原生质的细胞间动态及其与胚囊发育的关系

Caryopsis dorsal vascular bundle and the endosperm were not direct contact ; between the two was nucellus tissue .

颖果背部维管束和胚乳组织不直接接触，二者之间有珠心突起组织。

With slight increase of hormone concentration , the differentiation of the sexual cells stopped and proliferation of the nucellus cells took place instead .

稍稍提高外源激素浓度，性细胞化化停止，代之以珠心细胞的增殖；

A low frequency of abnormal nucellar growth was observed in AP ⅳ, but no embryo developed from nucellus cell was found under natural condition .

APⅣ珠心组织出现低频率异常生长的现象，但未观察到在自然条件下由珠心细胞发育形成的不定胚。

In explants of M99 , DNA and RNA content increased in ovules , especially in nucellus .

M99上的外植体，胚珠内尤其是珠心组织中DNA、RNA含量增加，薄壁细胞内DNA含量逐渐减少；

The female archesporium differentiates from many cells under the subhypodermis of nucellus .

雌性孢原为珠心亚表皮下多细胞。

This mass , which connected the haustorium with nucellus was likely to be as an active functional unit of haustorium .

胚乳细胞质团追接胚乳吸器和外侧的珠心组织，它可能是胚乳吸器一个活跃的功能单位。

After years of observation and assessment on the top-grafting plants of nucellus seedlings , considerable quality variations were found among nucellus embryo plants .

对珠心苗高接植株多年观察及品质鉴定，认为珠心胚植株在品质上表现较大差异。

Since the 5th day after observing embryo , seed production paraffin section is taken every 5 days , observes the nucellus embryos when to embryo sac .

自观察到幼胚后的第5d起，每隔5天取种子制作石蜡切片，镜检珠心胚何时开始入侵胚囊。

The research mainly includes the development processes of embryo and endosperm , pericarp and spermoderm as well as the changes of nucellus and chalaza .

主要包括胚与胚乳的发育过程，果皮与种皮的发育，珠心与合点的变化。

Embryological observation of ovary culture shows that haploid plants are from megaspore tetrad , while diploid plants are probably from nucellus cell .

同时在珠心细胞中观察到旺盛的分裂活动和细胞团的形成，这可能是二倍体植株的来源。

There were only two layers of nucellus which had abundant cytoplasm and reserved substance , and were consumed at the stage of late heart-shaped embryo .

珠心细胞只有两层，细胞核大，胞质丰富，内含贮藏物质，至心形胚期逐渐解体。

The ovule is orthotropous and crassinucellate , nucellus is surrounded by three envelopes .

胚珠直生，厚珠心，珠心被内、外珠被以及盖被等三层被膜所包围。

However , the nucellus becomes thicker and thicker and eventually constitutes the major portion of the mature seed and forms the permanent food storing tissue called prosembryum .

而珠心组织则一天天增厚，其细胞体积也一天天增大，最后成为种子的永久性的营业养组织即外胚乳。

The region of an ovule that is opposite the micropyle , where the integuments and nucellus are joined .

合点珠孔对面的胚珠内结合珠被和珠心的一个区域。

Mature ovule was componented of nucellus , integument , bead handles , combined point and composition of the nucellar beak .

成熟的胚珠是由珠心、珠被、珠柄，合点和珠心喙组成。

In the second year , the resting pollen tube revives its activity in the nucellus towards the March . The two unequal male gamete formed in the April .

第二年三月，休眠的花粉管在珠心内恢复活动，四月形成二个不等的雄配子。

The result were as follows : The embryonic development began in the nucellus tissue from a archesporium cell which would divide to a sporogenous cell and a parietal cell .

结果表明：锥栗胚胎发育始于珠心组织中的一枚孢原细胞。

There are many wall ingrowths in the boundary wall between endosperm and degenerated nucellus , which is benefit to the material transport from degenerated nucellus to endosperm .

胚乳与珠心组织分界壁-胚囊壁上有发达的壁内突，有利于珠心组织内的物质向胚乳内转运；

When female inflorescences accepted the pollen grains , ovary development was increased in early May . With the development of either of the two ovule , funiculus , integument and nucellus were differentiated .

5月上旬，雌花序授粉后，迅速增长，子房膨大，两个胚珠分化出珠柄、珠被和珠心，珠心中产生孢原细胞；

The main cause of the incompatibility between P.koraiensis and P.tabulaeformis is the pollen of P.tabulaeformis showing poor or no germination in the nucellus of P.koraiensis .

红松和油松杂交不孕的主要原因是，油松的花粉不能在红松的珠心上发芽。

If the ovule aborts before or after the stage of functional megaspore , an elliptical sac with rugosity from in the nucellus , and functional male flower will from .

若胚珠在功能大孢子出现前后败育，则在胚珠形成椭圆的、内含皱折的空腔，决定雄能花的形成；

It was also observed in white cucumber that there were multipolar nucleus-like in the center of mature embryo sac , nucellus cells were dispersed and the edge of some megaspore sacs were irregular .

观察白皮黄瓜成熟胚囊发现，在胚囊中央观察到多个类极核，珠心组织细胞离散、变形，大孢子囊边缘不规则。