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- 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。
- 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 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。
- 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。
- 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。
- 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。
- The ovule is bitegminous, crassinucellate and anatropous.The megaspore mother cell divides into linear megaspore terad after meiosis. 大孢子母细胞减数分裂形成线形排列的4个大孢子,合点端大孢子具功能。
- Matureembryo sac can form from megaspore mother cell on the modified VW medium supplemented with 0.5mg/L BA and 0.1 mg/L NAA. 在改良VW培养基上添加0.;5mg/LBA和0
- Mature embryo sac can form from megaspore mother cell on the modified VW medium supplemented with 0.5mg/L BA and 0.1 mg/L NAA. 在改良VW培养基上添加0.;5 mg/L BA和0
- The one megaspore archesporial under the nucellar epidermal cell differentiate directly into megaspore mother cell, the meiosis of megaspore mother cell are nomally. 大孢子孢原细胞在直接发育为大孢子母细胞,大孢子母细胞减数分裂正常,四分体直线型;
- 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。
- The megaspore mother cells are developed directly by a hypodermal archesporical cell. 大孢子孢原单细胞。
- 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。
- 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。
- After the meiosis process, the megaspore mother cell is divided into four linearly arrayed megaspores, but usually, only the one at the chalazal end is functionalized. 大孢子母细胞经减数分裂形成线形排列的4个大孢子,合点端大孢子具功能;
- Cytokinesis in the megaspore mother cell accompanies meiosis and the Chalaza megaspore of a linear three cells develops into 8-nuclealeate.The development of embryo sac is of the Polygonum type. 大孢子母细胞减数分裂形成三分体即3个大孢子,合点端的大孢子发育为胚囊,胚囊蓼型。
- megaspore mother cell(megasporocyte) 大孢子母细胞
- 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。
- megaspore mother cell 大孢子母细胞
- 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。