胚珠的

Most angiosperm ovules possess two integuments, while gymnosperms usually have only one.

大多数被子植物的胚珠有两层珠被，而裸子植物通常只有一层。

The relationship among calcium signal transduction, pollen-ovule interaction, and Programmed cell death was discussed from these studies, and the results are as follows:(1) Great difference was observed in the calcium distribution of pollens in the micropylar canal of self-pollinated and cross-pollinated ovules: a large quantity of calcium precipitates was located on the intine of self-pollinated pollen, while none on cross-pollinated pollen.

研究结果表明：(1)传粉后到受精前，自交和异交授粉胚珠珠孔道内花粉的钙信号表达存在很大差异，前者在花粉内壁上有大量表达，后者则没有。

Porogamy The usual method of fertilization in angiosperms in which the pollen tube enters the ovule by the micropyle.

珠孔受精：被子植物通常的受精方式。花粉管通过珠孔进入胚珠。

The ovule development process of Cercediphyllum japonicum were beginning in November in the area of Nanjing. The integument and nucellus were checked in the middle of April.

连香树在南京地区11月初连香树胚珠已经开始发育，4月中旬可以观察到珠被和珠心的明显形态。

The occurrence of more than one embryo in the ovule denotes polyembryony.

在胚珠中有一个以上的胚发生是表示多胚现象。

Could be observed on 10th day after pollination, archesporial cell on 20thday, megasporocyte on 24th day, the functional megaspore on 30th day; and 8-nucleate embryo sac on 41th day. And then double fertilization finish and early globular embryo emerg.

授粉10 d出现指状突起，20 d形成胚珠原基，24 d大孢子母细胞发生，30 d功能大孢子形成，41 d发育为成熟的八核胚囊，而后完成双受精发育成早期球形胚。

The investigation of the structures of reproductive organs,megasporogenesis,microsporogenesis and the development of male and female gametophyte in Dendrocalamus sinicus are made using normal paraffin method in this article.

通过石蜡切片的方法对巨龙竹生殖器官结构、大小孢子的发生和雌、雄配子体的发育过程进行了观察研究。巨龙竹为一心皮组成的单室单子房，子房内具有一个胚珠，倒生、双珠被、厚珠心。

Dioecious monoecious, reproductive structures axillary, solitary. Pollen cones pedicellate, globose, with overlapping bracts at base; microsporophylls 6-14, shield-shaped, each with 4-9 radially arranged pollen sacs. Seed-bearing structures subsessile, with several overlapping bracts basically. Ovule erected, entrusted with disc-like embryophore. After fertilization, embryophore developed into fleshy, cup-like and red aril.

雌雄异株，球花单生于叶腋，有短柄；雄球花圆球形，基部覆瓦状排列的苞片，雄蕊6-14枚，盾状，花药4-9丝，辐射状排列；雌球花几乎无柄，基部有多数覆瓦状排列的苞片，胚珠直立，基部托以圆盘状的珠托，受精后珠托发育成肉质、杯状、红色的假种皮。

Carpels 2, rarely 3-5(-10), usually ± connate; ovary superior or semi-inferior to inferior, 2- or 3-5(-10)-loculed with axile placentation, or 1-loculed with parietal placentation, rarely with apical placentation; ovules usually many, 2- to many seriate, crassinucellate or tenuinucellate, sometimes with transitional forms; integument 1- or 2-seriate; styles free or ± connate.

心皮2，很少3-5(-10)，通常多少合生；半不如下位的子房上位或，2-或3-5-10室具中轴胎座，或1室具侧膜胎座，很少具顶端placentation；通常胚珠很多，2-在很多具薄珠心的crassinucellate或，有时具过渡形式，seriate；珠被1或2 seriate；花柱离生或多少合生。

The vascular bundle of stem is the type of double phloem. The anther is tetrasporangiate. Simultaneous cytokinesis in the microspore mother cell follows meriosis.

茎的维管束是双韧类型；雄蕊的花药四室，小孢子的形成为同时型胞质分裂，悬垂胎座，倒生胚珠，核型胚乳，果实成熟时胚仍处于球形胚阶段。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。