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.
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.
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.
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.
开花前后可以由于外施IAA，明显增加胚珠的纤维数量。
Adding to IAA before blooming previously increases the cotton fiber quantity.
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.
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。
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 .
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。
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.
胚珠是半球形的，有2个被膜，腱鞘状，而原孢子细胞直接作为大孢子母细胞起作用。
The ovules are hemitropous, with 2 integuments, tenuinucellate and the archesporial cell functions directly as the mega-spore mother cell.
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.
结果表明，倒生的棉花胚珠可以分为合点区、株柄顶区、腰区和珠孔区。
The results showed that ovule surface might bedivded into the chalazal zone, crest zone, middle zone and the micropylezone.
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.
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.
对7个葡萄二倍体与四倍体杂交组合的胚珠进行离体培养研究。
In vitro of ovules in 7 cross combination between diploid and tetraploid cultivars of grape were studied in this experiment.
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.
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.
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.
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.
在胚珠发育过程中，细胞壁上逐步出现不连续的高电子致密物质，液泡逐渐变大，细胞分化逐渐明显。
In the course of ovule development, un-continual density election substances gradually appeared in cell walls, vacuole gradually become big and cell separated gradually marked.
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.
棉花细胞质雄性不育花药、叶片和胚珠中，IA A氧化酶、色氨酸合成酶和细胞分裂素氧化酶活性的变化与内源激素含量的变化基本一致。
Changes of the activity of IAA oxidase, tryptophan synthetase and cytokinin oxidase in sterile anther, leaf and ovule were similar to those of phytohormones.
当胚发育最为充分而又尚未败育时取胚珠进行培养，存活胚的比例较高。
When embryos developed fully and did not abortive, ovules might be cultured, and percentage of the viable embryos was higher.
培养50—70天，7个杂交组合及2个自交品种的胚珠均获得一定频率的胚(包括成熟和不成熟胚)及成熟胚萌发的苗。
After being cultured 50-70 days, embryos (including mature and immature ones) as well as seedlings from the mature embryo are obtained from 7 crosses and 2 selfed cultivars with a certain frequency.
离体诱导不同类型的纤维突变体胚珠纤维发育，研究纤维突变体离体纤维发育的情况。
The fiber induction and development from cotton ovules of fiber mutants in vitro were studied and analyzed.
的开花物侯、开花动态、访花者的种类、行为和访花频率，并对其繁育系统、花粉-胚珠比（P/O）、花粉活力进行了检测。
The flowering phase and dynamics, insect visitors and their behavior and visiting frequency were observed, and the breeding system, pollen-ovule ratio (P/O) and pollen viability were determined.
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.
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.
应用推荐