查询词典 sperm sac

The megagamete fertility, the quantity of the anther , pollen sac wall structure and the dehiscent state, the quantity of the pollen grain were observed in the flowering phase I

第Ⅰ花期观察供试材料的雌配子育性、颖花内花药数、花药吐露情况、成熟花粉囊壁的开裂状况与结构、花粉量

During the development three outstandingcharacteristics were observed:three kinds of different division taking place;.the orientation of spindle to be fixed in the three mitosis of one-nucleate embryo sac;.changes of starch grains during megagametophyte development to be regularity.

单核胚囊三次有丝分裂纺锤体的定向较为固定。

The results are summarized as follows: tin the polygonum embryo sac of tetraploid grape , megaspore telrad arranged in straight line.

结果如下：在四倍体葡萄的蓼型胚囊中，四分体孢子呈直线排列，合点端的大孢子发育胚囊。

Ten days post meiosis, megaspore gave rise to the one nucleate embryo sac.

花粉粒在授粉后三天发芽长出花粉管。

The megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of the polygonum type.

大孢子四分体线形排列，合点端大孢子为功能大孢子，胚囊发育为蓼型。

Mature embryo sac can form from megaspore mother cell on the modified VW medium supplemented with 0.5mg/L BA and 0.1 mg/L NAA.

在培养基无外源激素或仅含生长素或细胞分裂素时，雌配子体的发生过程不能顺利完成；在改良VW培养基上添加0.5 mg/L BA和0.1 mg/LNAA时，形成成熟胚囊。

But,some functional cells containdistinct starch grains like mature megaspore and single nucleate embryo sac which isin the station before division.

同样，从单核胚囊分裂开始到八核胚囊刚形成也未观察到淀粉粒。

The megaspore mother cell is located at the 3rd or 4th layer of cells in the nucellus top end. It divides transversally to form a linear megaspore tetrad, and the megaspore at the chalazal end develops into the embryo sac mother cell.

大孢子母细胞位在珠心顶表皮下第三或四层细胞处，经横分裂后产生一直线形的大孢子四分体，其中位居合点端的大孢子发育成胚囊母细胞。

These animals,which threshold of auditory nerve compound active potential and cochlear microphonic potential heightening evidently,showed that the amplitude of endolymphatic potential bring down in various degress,which was related to the change of the active of Na+-K+-ATPase and SDH in vascularis stria and endolymphatic sac.

研究证实，同种内耳抗原(isologous inner ear antigen，IIEAg)免疫可造成ASHL动物模型；并行体液与细胞转移免疫均获得成功；针对内耳组织的特异性抗体和淋巴细胞可经体液循环到达内耳局部；内淋巴囊(endolymphatic sac，ES)在其中起着重要作用〔1～4〕。

The thesis work is to investigate the connection of [Ca2+]cyt and fertilization by avoiding drawbacks noted above, say, employing an ideal experimental plant, Torenia fournieri , with a naked embryo sac that protrudes from the micropyle.

因此，材料本身的结构限制和研究手段的限制使得植物双受精过程中胚囊内胞质游离钙的研究相比之下显得落后。

You can snipe the second and third union leaders from this position.

您可以鹬第二和第三工会领袖从这一立场出发。

Aiming at the currently shortage of XML streams quality detecting, this paper proposes a new forecasting method of XML streams quality by least squares support vector machines, which is used the method of XML keys' vector matrix as windows, and vector product wavelet transform to multilevel decompose and refactor the XML streams series, that can fulfill real-time checking demand of XML quality, and ensure constraint, consist- ency and integrality. For even more adapting net load, it proposes a control strategy by weight and adaptive adjustment to ensure XML streams quality.

针对当前XML数据流质量检测存在的不足，提出构建XML键的矢量矩阵作为窗口，利用矢量积小波变换多级分解与重构XML数据流，再结合最小二乘支持向量机对XML数据流质量进行预测的一种方法，满足XML数据流质量重构时实时检测的要求，保证XML数据的约束性、一致性与完整性；为了更好的适应网络负载，采取加权与自适应窗口调整等调度策略充分保证XML数据流的质量检测。