nucellar

The character of macrospore in development were as followed: anatropal ovule, basal placenta, thick nucellar, two integument, megaspore mother cell coming directly from archesporial cell, early degenerating antipodal cell, thedevelopment of the embryo sac being conformed as the polygonum type.

雌配子体发育的特点是：倒生胚珠、基底胎座、厚珠心、双珠被、孢原细胞直接长大成大孢子母细胞、反足细胞退化早，胚珠发育为蓼型。

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Activation of nucellar cells by discharge from the pollen tubes has been claimed.

认为由花粉管的流出物能使珠心细胞活化.

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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。

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In mature embryo sac, the nucellar cap is composed of 2～7 layer of cells.

珠心帽在胚囊成熟时, 具有2～7层细胞.

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The third pass debranned the episperm and a part of nucellar layer.

第三道碾皮主要碾除了麦粒的种皮及部分珠心层。

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The nucellar epidermal cell cuts off several layer nucellar parietal cells.

珠心表皮细胞平周分裂产生多层珠心周缘细胞,为厚珠心.

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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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The nucellar embryo suspensor , its development passed through the similar stages of the zygotic embryo.

珠心胚发育经历与合子胚相同的发育阶段.

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The habituated nucellar calli consisted of embryogenic and non-embryogenic cells.

电镜和光镜观察表明，适应型珠心愈伤组织由胚性细胞和非胚性细胞组成。

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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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