1、

A single archesporium differentiates immediately below the nucellar epidermis, it functions directly 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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3、

Hypodermal archesporium is 2 or 3 cells; a single cell well developed into megaspore mother cell. Undergoes meiotic divisions, produces a linear tetrad.

大孢子孢原细胞2~3个,其中1个发育为大孢子母细胞,大孢子母细胞减数分裂形成直线四分体,合点端的大孢子为功能大孢子,珠孔端3个大孢子退化。

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4、

The archesporium in its pistils directly developed into megaspore mother cells, which later divided into macrospores through meiosis.

孢原细胞直接发育成大孢子母细胞,然后大孢子母细胞减数分裂形成大孢子。

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5、

The archesporium is divided into a parietal cell and a sporogenous cell, by the periclinal division.

孢原细胞进行平周分裂形成一个周缘细胞和一个造孢细胞。

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6、

Megasporogenesis and Female Gametogenesis: Archesporium is of one cell, it directly functions as macrospore mother cell.

大孢子和雌配子体发生:孢原为一个细胞,它直接起大孢子母细胞功能。

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8、

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。

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