这种现象可能与胚珠后期败育有关。
This phenomenon was probably correlated with ovule abortion.
珠鳞基部近轴面着生2个胚珠；
胚珠的异常常伴随着花药的异常而发生。
The abnormal ovule often appear simultaneously with the abnormal anther.
初生合点吸器沿着胚珠的维管组织分支。
The primary chalazal haustorium ramifies around the vascular tissues of the ovule.
三月中旬，胚珠原体形成。
胚珠生于什么位置等。
由WUS建立的信号体系还参与胚珠的发育。
The signal system established by WUS is also involved in ovule development.
本文首次报告了甜菜远缘杂交胚珠培养的结果。
This paper reported the first results of ovule culture in beet wide hybridization.
番茄的胚珠倒生。
实验结果说明花粉管的定向生长受胚珠的分子信号调控。
It is suggested that directional growth of pollen tubes are controlled by molecular signal in ovule.
的花粉形态和水合特性及胚珠发育、传粉滴形成与传粉过程。
Pollen morphology and hydration, ovule development, formation of pollination drop and the pollination process of Taxus chinensis (Pilg.
扁桃果实由单心皮上位子房发育而成，边缘胎座，横生胚珠。
The almond fruit was developed from solitary carpel in the superior ovary which there were the border placenta and amphitropous ovule.
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。
Most angiosperm ovules possess two integuments, while gymnosperms usually have only one.
试验证明胚珠培养在克服萝卜和大白菜属间杂交不亲和性方面具有一定意义。
The experiment showed that ovule culture in overcoming cross-incompatibility between radish and Chinese cabbage is of significance.
运用常规石蜡制片法，在光学水平观察了淀粉在大麦胚珠发育中的消长动态。
Based on the conventional paraffin sectioning method, observation was done at the optical level on the dynamics of starch during the ovular development in barley.
极早熟桃品种“春蕾”果实硬熟期的幼胚在胚珠离体培养条件下维持胚性生长。
The young embryo of super-early maturing peach variety 'Chunlei 'at fruit hard-ripe stage maintain embryonic growth under the conditions of in vitro culture of ovule.
本工作对苎麻花药的发育和花粉粒的形成、胚珠的发育和胚囊的形成进行了观察。
In present work, the development of anther, formation of pollen grain and development of ovule and formation of embryo sac in Ramie were observed.
开花当天内源IAA含量的急剧上升可能是胚珠表皮细胞迅速伸长的一个重要原因。
The remarkably raised IAA level at anthesis may be responsible for the epidermal cell expansion.
雄球花序中的不育胚珠和雄球花以及雌球花序中的胚珠均起源于环状总苞基部的分生组织。
The abortive ovules and male flowers in male cone inflorescence and the ovules in female cone inflorescence are originated from an annular meristem which differentiates from the base of each collar.
子房具胚珠20—23枚，胚珠横生，珠被二层，薄珠心，孢原细胞直接起大孢子母细胞作用。
The ovary contains 20-23 ovules. The ovules are hemitropous, with 2 integuments, tenuinucellate and the archesporial cell functions directly as the mega-spore mother cell.
胚珠发育和雌配子体形成过程中遗传控制分子机理研究的材料主要来源于对突变体的发现和诱导。
The material for studies on molecular mechanism of genetic regulation in the course of ovule development and gametophytes forming were mainly from the finding and inducement of mutation.
首次利用数字化图像处理软件确定了离体胚珠及纤维生长轮廓所形成的面积，较纤维长度测量简单易行。
For the first time, the area formatted by the outline of cultured ovule and fibers was determined using digital image analysis software. This method is relative easier than length measurement.
进一步提高外源激素浓度，珠心细胞又可以分化出新的胚珠原基，进一步长大以后发育成许多新的胚珠。
Upon further increase of the exogenous hormone concentration, new ovule primordia could be formed from the proliferated nucellus cells, which further developed into many new ovules.
联系红花木莲花粉粒数目和胚珠数目进行探讨，认为雄配子体发育不是影响红花木莲结籽率低的主要因素。
The process of male gamete formation was not considered as an important factor responsible for the low seeding rate.
基于返祖性畸形三胚珠球花的出现及其他形态特征，认为麻黄属胚珠数目减少是该属内物种特化的一个趋势；
Reduction of ovule number as a tendency of speciation in the genus is substantiated by the occurrence of tri_ovulate cones coupled with comprehensive characters of the genus.
该文从雌配子体发育、胚珠发育及珠被发育等几个方面综述了近年来植物雌配子体发育的分子调控机制研究进展。
Studies on molecular regulation of female gametophyte development were reviewed in terms of female gametophyte and ovule and integument development.
棉花胚珠离体培养方法被广泛用于棉纤维发育的研究，这种方法使对纤维的分化和发育研究能够在可控的条件下进行。
In vitro culture of cotton ovule has been widely used in studying of cotton fiber development, which makes the research of fiber differentiation and development possible under controllable condition.
他还观察到裸子植物的胚珠并不是被子房壁包围，这个发现直接导致了被子植物和裸子植物之间最根本的几点区别的建立。
He also observed that gymnosperm ovules were not enclosed in an ovary wall, leading to the establishment of one of the basic differences between angiosperms and gymnosperms.
他还观察到裸子植物的胚珠并不是被子房壁包围，这个发现直接导致了被子植物和裸子植物之间最根本的几点区别的建立。
He also observed that gymnosperm ovules were not enclosed in an ovary wall, leading to the establishment of one of the basic differences between angiosperms and gymnosperms.
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