查询词典 pollen chamber

By the nucellar cells PCD, which were encircling the female gametophyte, the pollen chamber connected with the archegonium chamber for the fertilization in coming.

在胚珠中的雌配子体发育完成、受精过程开始之前，贮粉室与颈卵器室贯通。这一过程是通过雌配子体周围的珠心细胞发生程序性死亡完成的。

The pollen grains of yew tree are directly fallen on the micropyle by wind and enter pollen chamber at the top of nucellus through pollination drops, a sugary exudation rich in nutritious materials at the micropyle.

红豆杉的花粉，一般借助风力直接传播到珠孔端的传粉滴上。传粉滴是珠心组织的周期性分泌产物，它富含糖和氨基酸等营养物质。

These results revealed that the pollen chamber developmental pattern passed through four phases. Firstly, a group of nucellar cells at the micropylar end elongated longitudinally. Thereafter, the uppermost nucellar cells at the micropylar end initiated PCD; and these elongated cells undergoed PCD in a basally and laterally oriented direction to form a cavity.

贮粉室的形态发生可分为4个阶段：最先是位于珠孔端的几层珠心细胞纵向地伸长；接着，珠孔端最顶部的珠心细胞发生PCD；然后，那些已经纵向伸长的珠心细胞向基地和侧向地依次发生死亡，产生贮粉室空腔；最后，珠孔端的珠心表皮细胞发生开裂，形成贮粉室的开口。

And the biochemical, cytochemical and ultrastructural changes in the nucellar cells in relation to the pollen chamber formation were studied.

胚珠贮粉室的发育过程，进行了扫描电子显微镜的观察，并对其间相关珠心细胞的生物化学、细胞化学和超微结构变化作了研究。

A development-course observation of the morphological changes in the nucellar cells undergoing PCD to form pollen chamber was performed.

在珠心细胞发生PCD的过程中，其形态变化显著，有序地降解细胞组分，其间液泡起着关键作用。

The appearance of DNA ladder from the ovules in which pollen chamber formation was undergoing, together with TUNEL assay and ultrastructural changes, demonstrated that the nucellar cell death, doomed to bring about pollen chamber, was a process of programmed cell death .

在贮粉室的形态发生过程中，相关珠心细胞的DNA电泳出现DNA ladder、其细胞核被TUNEL反应所标记以及它们的超微结构变化都说明，参与贮粉室形成的珠心细胞的死亡是一种细胞程序性死亡（programmed cell death，PCD）。

No tapetal cells were formed or tapetam collapsed at very early stage in some anther chamber during the microsporogenesis; Pollen mother cells in another chamber were not developed and microspore vacuolized; Tapetum cells developed abnormally, giantized and crammed the anther chamber; Some tapetum cells developed normally, but PMCs developed abnomally, which deformed at sporogeneous stage, and then were abhensive each other and finally degenerated. Nearly no PMCs could complete the process of meiosis, and form the tetrad, leading to the failure of normal microspore development.

药室的绒毡层细胞不形成或提前解体；药室内的花粉母细胞不发育或小孢子液泡化；绒毡层细胞发育异常，出现巨型化而挤满整个药室；绒毡层细胞虽发育正常，但花粉母细胞发育异常，在造孢细胞时期即开始出现变形现象，随后发生粘连退化；绝大部分花粉母细胞不能完成正常的减数分裂过程形成四分体，导致小孢子退化。

Blooms hang upside down like Chinese lanterns, luring bees into an elaborate pollen chamber.

花朵向下生长就好像一个灯笼，将蜜蜂吸引到精心打造的花粉室。

Blooms hang upside down like Chinese lanterns, luring bees into an elaborate pollen chamber.

花朵倒挂，宛如中国灯笼，引诱蜜蜂坠入精心准备的花粉室。

The pollen grains of yew tree are directly fallen on the micropyle by wind and enter pollen chamber at the top of nucellus through pollination drops, a sugary exudation rich in nutritious materials at the micropyle.

红豆杉叶片外表面覆盖较厚的角质层和表面蜡质，具有乳头状角质钉，以及长条形或顶端分叉的角质突起。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。