nucellus

1. 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。
2. 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。
3. 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。
4. 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。
5. 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。
6. 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；
7. Soluble polysaccharides was observed in the nucellus cells.
   珠心细胞中只见到可溶性多糖。
8. 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。
9. 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。
10. The nutrient transportation was associated with the persistent synergid. There is no starch in the nucellus, integuments and the antipodal cells, the persistent synergid contains a large amount of starch.
    宿存助细胞与营养物质的转运有关。珠心、珠被、反足细胞都不含淀粉。宿存助细胞具丰富的淀粉。
11. 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。
12. The pistil has two carpels, the ovules belong to straight ovules with bitegmic; 77% nucellus stoped development before from the archesporial cell and disappear and 23% nucellus atrophy.
    安祖花的雌蕊是由2心皮组成，胚珠为直生胚珠，双珠被，77%珠心细胞在胞原细胞形成之前停止发育，并且逐渐解体消失，23%珠心细胞发生萎缩，导致雌蕊败育。
13. 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。
14. 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；
15. The style, integument, nucellus, synergid and antipodal cell lack starch in the entire coarse of the hybrid embryo and endosperm development, The synergid embryo also lacks starch just as the synergid does.
    花柱、珠被、珠心组织及胚囊中的助细胞和反足细胞，在整个杂种胚和胚乳发育过程中，始终不存在淀粉粒。助细胞胚亦和助细胞一样，无淀粉粒的存在。
16. 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。
17. 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。
18. 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。
19. 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。
20. 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
21. However, the nucellus cells at the chalaza end split and reproduce, which results in the appearance of an expanded apophysis that keeps its shape until the seed becomes mature during the development process of the fruit in the coming year.
    而合点端的珠心细胞不断分裂增值，在来年的果实发育过程中，形成一球状的膨大突起并保持到种子成熟。
22. 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。
23. The pistil shape structure of the almond is: Wet column cap, style solid, ovary 1 room, the basal placenta, overflowing-ovule, pairs of integuments, thick nucellus, having obturator.
    扁桃雌蕊形态结构为：湿型柱头，花柱实心，子房1室，基生胎座，横生胚珠，双珠被，厚珠心，有珠孔塞。
24. It is different with former researchers that the way of exogenous DNA delivered by pollen tube pathway is pollen tube-external pathway not pollen tube-internal pathway or only just nucellus pathway, transforming receptor cell is generative cell in fusion status not zygote.
    把外源基因导入的途径确立为花粉管外通道而非花粉管内通道、珠心孔道等，转化受体确定为融合期的生殖细胞而非受精卵（合子）、早期合子细胞等，明显不同于先前的假说。
25. 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。
26. 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。

noun

1. central part of a plant ovule