megaspore
n. 大孢子；（种子植物的）胚囊
n.
大孢子，（种子植物的）胚囊；
英英释义
megaspore[ 'meɡəspɔ: ]
n.larger of the two types of spore produced in heterosporous plants; develops in ovule into a female gametophyte
同义词：macrospore
双语例句
用作名词(n.)
Of the four products of a megaspore mother cell, three usually abort.
在大孢子母细胞分裂产生的四个孢子中，三个会解体消失。
The chalazal end megaspore develops into the embryo sac mother cell.
合点端大孢子发育为胚囊母细胞。
The chalazal end megaspore develops into the embryo sac mother cell.
合点端大孢子发育为胚囊母细胞。
权威例句
MegasporeMegaspore
megaspore:
MEGASPORE WALL ULTRASTRUCTURE IN ISOETES
Megaspore Abortion: A Consequence of Selective Apoptosis?
Isoëtes Megaspore Surface Morphology: Nomenclature, Variation, and Systematic Importance
Cytokinin-dependent specification of the functional megaspore in the Arabidopsis female gametophyte.
Colloidal crystal-like structure of sporopollenin in the megaspore walls of Recent Selaginella and similar fossil spores
Transcriptome Analysis of the Arabidopsis Megaspore Mother Cell Uncovers the Importance of RNA Helicases for Plant Germline Develo...
The Role of Self-Assembly in Biological Systems: Evidence from Iridescent Colloidal Sporopollenin in Selaginella Megaspore Walls
megaspore (n.)
1857, from mega- + spore.
1. As development goes on, callose fluorescence disappears in the chalazal wall of diplosporous functional megaspore.
二倍体功能大孢子的合点端细胞壁内的胼胝质荧光消失。
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2. In theterosporous species, a distinction is usually made between megaspore mother cells and microspore mother cells.
在异型孢子体种类中，可区分为大孢子母细胞和小孢子母细胞。
dict.bioon.com
3. In dandelion ( Taraxacum ), for example, the chromosomes of the megaspore mother cell remain in one cell after the first meiotic division, forming a restitution nucleus.
例如在蒲公英中，在第一次减数分裂后，大孢子母细胞的染色体仍在一个细胞中，形成一个再组核。
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4. The chalazal end megaspore develops into the embryo sac mother cell.
合点端大孢子发育为胚囊母细胞。
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5. The megaspore archesporium splits circumference, it circumferential edge cell and a sporogenous cell.
大孢子孢原进行平周分裂，产生一个周缘细胞和一个造孢细胞。
dict.cnki.net
6. Function megaspore is in the chalaza and the monosporic embryo sac is chenopodiad type.
功能大孢子位于合点端，大孢子发育为蓼型胚囊。
www.ceps.com.tw
7. A single archesporium differentiates immediately below the nucellar epidermis, it functions directly as the megaspore mother cell.
孢原细胞处于珠心表皮之下，直接起大孢子母细胞的功能。
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8. The megaspore mother cell meiosis to form a linear megaspore tetrad.
大孢子母细胞减数分裂产生直线形大孢子四分体。
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9. The polysaccharides in the cells of micropylar and chalazal end increases with the formation of functional megaspore.
一旦功能大孢子分化，合点和珠孔端细胞中多糖增加。
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10. No callose fluorescence shows in the wall of mononuclear embryo sac after its formation, while thick callose deposits in the wall of the degenerative megaspore.
单核胚囊形成后，其细胞壁内无胼胝质荧光，而退化的大孢子细胞壁胼胝质荧光显著。
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11. Of the four products of a megaspore mother cell, three usually abort.
在大孢子母细胞分裂产生的四个孢子中，三个会解体消失。
plb.snnu.edu.cn
12. Little ACPase was localized ia the cytoplasm from functional megaspore to 7-celled embryo sac stage, and striking difference was not observed between its two ends.
从功能大孢子至七细胞胚囊期，胚囊内部胞质酸性磷酸酶活性很低，合点与珠孔两端的反应强度无明显区别。
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13. Arrangement of megaspore is linear shaped, the megaspore of chalazal end is functional megaspore.
大孢子排列为直线型，合点端大孢子为功能大孢子。
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14. Plasmodesmata in the chalazal end wall as a site for symplastic transportation between nucellar cells and embryo sac only appear in functional megaspore and 1-nucleate embryo sac at early stage.
在功能大孢子及单核胚囊早期是通过合点端的胞间连丝与珠心细胞以共质体形式相通；
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15. A large amount of starch deposit found in functional megaspore and nucellar cells are presumably as the nutrient source in the developmental process of embryo sac.
可能有助于营养物质进入胚囊。 4。功能大孢子中贮存丰富的淀粉粒，它和珠心细胞一起是胚囊发育时的营养来源。
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16. So it defined as crassinucellate. The megaspore mother cell divides transversally to form a linear megaspore tetrad. The megaspore at the chalazal end develops into the embryo sac mother cell.
大孢子母细胞经横向分裂后产生一直线形的大孢子四分体，之后位居合点端之大孢子发育成胚囊母细胞。
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17. 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。
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18. The megaspore tetrad is linear, but only the megaspore near thechalazal end remain The formation of embryo sac is Polygonum type.
功能大孢子为合点端的一个单孢子，胚囊发育类型为蓼型；
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19. Successive cytokinesis in the megasporocyte follows meiosis and the megaspore tetrads are linear.
大孢子母细胞减数分裂形成直线型四分体。
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20. The megaspore mother cell undergoing meiotic divisions produces a T-shaped, or, rarely, linear tetrad.
大孢子母细胞减数分裂产生T形四分体和少数线形四分体。
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21. The archesporial cell is a cell of 3￣4 layer cells under the nucellar epidermis, the archesporial does not undergo meiosis and becomes the megaspore mother cell.
孢原细胞为表皮下3～4层细胞处的一个细胞，孢原细胞不经分裂直接发育成大孢子母细胞。
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22. This shows a synchronous development of megaspore and pollen chamber.
反映大孢子发育和贮粉室发生的同步性。
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23. The chalazal megaspore of a linear tetrad develops into a polygonum type sac.
四分体线行排列，合点端的大孢子发育为蓼型胚囊。
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24. The megasporocyte undergoes meiosis and gives rise to a linear or a"T" shaped tetrad of megaspore, the chalazal megaspore was functional.
大孢子母细胞减数分裂形成四个线形或“T”形排列的大孢子，合点端大孢子具功能。
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25. 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。
dict.cnki.net
26. According to the developmental characters of the megaspore mother cells, diplospories in angiosperms were divided into 8 types, viz.
根据大孢子母细胞的发育特性，将被子植物的二倍体孢子生殖分为8种类型，不同类型的胚胎学机制各不相同。
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27. Development of megaspore and formation of embryo sac:The ovule has a layer of parietal cells at the sporogenous stage.
大孢子的发育及胚囊的形成：造孢时期，造孢细胞发育成大孢子母细胞。
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28. Megaspore tetrad is linear. the chalazal megaspore develops into an embryo sac of polygonum type. Hypostase and special integument tapetum exist in the ovule.
大胞子四分体线形排列，合点端大孢子为功能大孢子，胚囊发育类型为蓼型，具有特化的珠被绒毡层和承珠盘。
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29. The megaspore mother cell undergone meiotic divisions and developed into a linear type of tetrads. The chalazal megaspore of the tetrad was functional.
大孢子母细胞减数分裂形成线形四分体，合点端大孢子为功能大孢子，胚囊发育类型为蓼型。
journal.kib.ac.cn
30. Our main results were as follows: the ovary of male I degenerated and disappeared quickly upon megaspore tetrad degeneration, and developed into macrosporocytes;
结果发现： 色木槭一期雄花（雄I）在大孢子四分体退化形成功能性大孢子时期，子房萎缩并迅速退化消失；
www.biodiversity-science.net
31. The gametophyte is derived from the product of a reduction division in the megaspore mother cell.
该配子体是由大孢子母细胞进行减数分裂而来。
-- 来源 -- 英汉 - 辞典例句
32. megaspore haustorium
大孢子吸器
-- 来源 -- 英汉 - 翻译参考[网络]
33. There is only one layer of parietal cells at the stage of sporogenous cell, megaspore mother cell and tetrad.
造孢细胞,大孢子母细胞和四分体时期,周缘细胞仅1层。
-- 来源 -- dict.cnki.net
34. megaspore membrane
大孢子壁
-- 来源 -- 英汉 - 翻译参考[网络]
35. megaspore mother cell
大孢子母细胞
-- 来源 -- 英汉 - 翻译参考[网络]
36. megaspore tetrad
四分大孢子
-- 来源 -- 英汉 - 翻译参考[网络]
37. In dandelion (Taraxacum), for example, the chromosomes of the megaspore mother cell remain in one cell after the first meiotic division, forming a restitution nucleus.
例如在蒲公英中，在第一次减数分裂后，大孢子母细胞的染色体仍在一个细胞中，形成一个再组核。
-- 来源 -- 网友提供
megaspore
