胚珠的

When ovule orientation is orthotropous the chalaza corresponds to the point where the funicle is attached but in anatropous and campylotropous ovules the chalaza is some distance from the funicle.

当胚珠的方向是直生胚珠时，合点和珠柄连成一条直线，当胚珠是倒生胚珠或弯生胚珠时，合点和珠柄之间有一定的距离。

The central portion of an ovule in which the embryo sac develops ;the megasporangium.

珠心胚珠的中心，胚芽囊在此发育；大孢子囊

The obturator of the ovule is of funicular origin.

黄檗胚珠的珠孔塞起源于珠柄。

The development of anther and ovule followed the finish of the flower organ initiation. Pollen mother cells and well developed microsporagium wall occurred when the diameter of the bud reached about 3.0 mm, and the archesporial cell which played the role of megaspore mother cell formed in ovule when the diameter of the bud reached about 3.5 mm.

花药及胚珠的发育与花器官的形态发生之间有明显的连续性，当花蕾直径为3.0 mm左右时花粉母细胞及完整的花粉囊壁形成，直径达到3.5 mm左右时胚珠中出现孢原细胞的分化，它直接起大孢子母细胞的功能。

Bead the one part of the ovule that be, ovule You Zhubing, bead composition of place of the nucellus that be mixed.

珠被为胚珠的一部分，胚珠由珠柄。珠被和珠心所组成。

Being or of the nature of an ovule.

胚珠的或有胚珠特点的。

The development of research has resolved in part many important problems, such as the origin and molecular mechanism of ovule ontogenesis. But these problems still require further study.

近年来，随着研究手段的不断改进，研究者对许多关键性的问题，如胚珠的起源、胚珠发生发育的分子机制已经有了一定的认识，但是这些问题并未得到圆满的解决。

Is one of the most important afforestation and ornamental species in China. Ovule abortion is a serious problem influencing the output of seeds and reproduction of Chinese pine.

但是油松胚珠败育是油松种子生产和繁殖面临的一个严重的问题，因此研究油松胚珠的发育机理和败育原因具有重要的理论和实践意义。

Cytological studies show that the incompatibility of interspecific hybridization of Abies is mainly due to the abort of embryos or ovules.

细胞学研究发现，杂种胚阶段胚或胚珠的败育是冷杉种间杂交不成功的主要原因。

At the same time,some ovule-specific cDNA clones in Orchid and Petunia flowers had been isolated and among them MADS Box genes may be responsible for the ovule differentiation and formation.

同时，已分别从蝶兰和矮牵牛的胚珠中分离出一批胚珠发育特异的基因，其中有关MADS Box 基因在胚珠形成和发育中的作用研究得比较清楚，基因转化工作证实胚珠的分化和形成受一类新的MADS Box基因控制。

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。