nucellus

nucellus

1. At the later stage of macro spore mother cell development, the quantity of starch within ovary wall diminished rapidly while starch grains occurred in the inner-integument and nucellus;

到大孢子母细胞晚期，内珠被和珠心组织开始淀粉积累时，子房壁淀粉含量迅速下降。

2. The tube nucleus disintegrates as the pollen tube penetrates the nucellus.

另外的粉管核会在花粉管穿过珠心时发生分裂。

3. The part of an ovule or seed where the integuments are connected to the nucellus, at the opposite end from the micropyle.

合点 Chalaza 胚珠或种子中珠被和珠心联合的部位，与珠孔相对。

4. 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

5. 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。

6. Chalaza (pl.chalaxae or chalazas) The region of an angiosperm ovule where the nucellus and integuments merge.

合点：被子植物胚珠上的一个区域，在合点处珠心和珠被愈合。

7. In endospermic seeds the endosperm replaces the nucellus and is often a rich source of growth-regulating substances.

在有胚乳种子中，胚乳取代珠心，成为生长调节物质（应为营养物质译者注）的丰富来源。

8. It includes the process whereby a diploid cell of the nucellus develops into an embryo giving a diploid seed with a genetic constitution identical to the parent.

在这个过程中珠心的二倍体细胞发育为胚胎，二倍体种子的遗传组成与亲本完全相同。

9. The single megaspore archesporial cell origins from nucellus hypodermal layer and becomes the megaspore mother cell directly, which as tenuinucellate.

大孢子孢原细胞起源于珠心次表皮层，并直接行使大孢子母细胞功能，为薄珠心。

10. The ovule is bitegminous and tenuinucellate.The archesporial cell locates under the nucellus epidermis, which develops into fuctional megasporocyte.

孢原细胞位于珠心表皮之下，直接起大孢子母细胞的功能。

11. Simple ovary, the placentation is brink.The ovules are campylotropous.The ovule is bitegmic and crassinucellate.The megaspore archesporium is initiated from sub-epidermis of nucellus.

摘要矮沙冬青子房单心皮1室，边缘胎座，弯生胚珠，胚珠具双珠被、厚珠心。

12. 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。

13. a minute structure in seed plants,containing the embryo sac and surrounded by the nucellus,that develops into a seed after fertilization

植物的一个小的结构，含有胚囊并被珠心所包围，施肥后长成种子

14. 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。

15. nucellus embryo

珠心胚

16. 2. The nucellus is usually degraded and absorbed as the endosperm develops.

珠心通常在胚乳发育时被分解和吸收。

17. Enclosure of the nucellus by the integuments is incomplete, the embryo sac or, in gymnosperms, to the archegonium.

珠被并不是将珠心完全封闭，而是留有珠孔以便受精时花粉管进入胚囊，或裸子植物的藏卵器。

18. integument A layer surrounding the nucellus in the ovules of gymnosperms and angiosperms.

珠被：是裸子植物和被子植物的胚珠中包裹珠心的结构。

19. A minute structure in seed plants, containing the embryo sac and surrounded by the nucellus, that develops into a seed after fertilization.

种子植物的一个小的结构,含有胚囊并被珠心所包围,施肥后长成种子。

20. 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。

21. A minute structure in seed plants,containing the embryo sac and surrounded by the nucellus,that develops into a seed after fertilization.

胚珠种子植物的一个小的结构，含有胚囊并被珠心所包围，施肥后长成种子

22. 39. 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。

23. Microstructural Aspects of Mature Embryo Sac Derived from Nucellus Cells in Pennisetum Squamulatum

非洲狼尾草无融合生殖胚囊显微结构特点

24. Ultrastructural Study of Nucleus Transfer in Nucellus of Pennisetum squamulatum

非洲狼尾草珠心细胞核穿壁运动超微结构研究

25. ULTRASTRUCTURAL OBSERVATION ON PROGRAMMED CELL DEATH OF NUCELLUS IN PENNISETUM SQUAMULATUM

非洲狼尾草珠心细胞程序死亡过程的超微结构观察