查询词典 proembryo

A suspensor-like structure was formed on the bottom of the proembryo. Along with the constant growth of the proembryo, its shape converted from long-ellipse to obovate, at last it evolved as a globular embryo with smooth surface, and there were absciss layer in the joint of the bottom of suspensor and matrix tissue.

随着原胚不断生长，其形状由长椭圆形发展成倒卵形，最后逐渐形成表面较光滑、外观近球形的球形胚，并在'胚柄'基部与母体组织连接处形成离层。

The other cells of the tetrad undergo degeneration. The mature embryo sac consists of an egg apparatus, a central cell, and 3 antipodal cells. The embryo sac is a monosporic Polygonum type. The zygote develops into a mature embryo going through proembryo, globular, heart, and torpedo stages.

胚囊发育类型为单孢子蓼型胚囊； 2胚的发育经过原胚、球形胚、心形胚和鱼雷胚等阶段发育为成熟胚；胚柄在球形胚时期最发达，但胚柄短小，只由3个扁平细胞组成，之后逐渐退化。

The proembryo from zygotic cell divisions may be divided into three parts: proper, hypoblast and suspensor .

玉米合子细胞分裂形成的原胚分为胚柄、基与胚体三部分。

Proembryo A young plant after fertilization but before differentiation into embryo and suspensor tissue.

原胚：从受精卵分裂形成2细胞胚开始至胚芽和胚柄等器官分化之前的胚。

Embryo The organism that develops from the zygote of a vascular plant after the proembryo has differentiated into embryo and SUSPENSOR but before germination, i.e.

胚：由维管植物受精卵发育而成，在原胚分化成胚胎和胚柄之后，萌发之前的结构。

The multicellular proembryo and globular embryo possessed uniserial or untidy disposal multi-cellular suspensor .

在多细胞原胚及球形胚期具有单列或不规则排列的多细胞胚柄。

Suspensor A temporary stalklike row of cells, found in angiosperms, that differentiates from the proembryo by mitosis and pushes the embryo into the nutritive endosperm after fertilization.

胚柄：被子植物中临时由一串细胞排列而成的茎样结构。

It undergoes the following stages, such as the clavated proembryo.the globular proembryo, the heart-shaped embryo and the torpedo -shaped embryo stage.

后经棒状原胚、球形原胚、心形胚、鱼雷形胚，至六月底，幼胚器官形成。七月中旬幼胚逐渐成熟。

The development phase of proembryo was about 30 days, young embryo 40 days and matu...

在形态发育的观察中，发现低温冻害会引起花粉在发育各阶段的形态异常及大量败育。

The reseach on activity changes of SOD, POD and CAT during the somatic embryogenesis of Y35 showed:(1) The activty of SOD was from 52.98 to 133.20 U·g-1·h-1, and remained a rising trend after early single embryo forming, this revealed that SOD might be positively correlated to the differentiation of embryogenic cell and the development of somatic embryo.(2) The activty of POD was from 0.05 to 0.50 U·mg-1·min-1, ascended firstly and desceded later, and was highest in embryogenic callus and lowest in late single embryo , this revealed that POD might be positively correlated to the division and differentiation of proembryo mass, while negatively correlated to the development of PEMⅢto late single embryo.(3) The activty of CAT was from 0.86 to 2.81 U·mg-1·min-1, showed an up-down-up trend, reaching to the highest peak at the time of early embryo formating and decreasing to the lowest at the time of early cotyledonary embryo formating, this revealed that CAT might be positively correlated to the development of early single embryo, while negatively correlated to the formation of middle single embryo and early cotyledonary embryo.The changes in activty of SOD, POD and CAT indicated these three antioxidant enzymes coregulated the differentiation and development of embryogenic cells during Larix somatic embryogenesis.4. Differentially expressed cDNA libraries of the stages of proembryo mass and somatic embryo maturation were successfully constructed by suppression subtractive hybridization.

对Y35体细胞胚胎发生过程中抗氧化酶活性变化的研究显示：(1)SOD活性在52.98~133.20 U·g-1·h-1之间，并在早期单胚形成后一直保持上升的趋势，表明其与胚性细胞的分化及体细胞胚的发育均具呈正相关；(2)POD活性在0.05~0.50 U·mg-1·min-1之间，呈现出先下降后升高的趋势，在胚性愈伤组织中最高，而在后期单胚形成时降至最低，表明其与原胚团的分裂和分化呈正相关，但与PEMⅢ向后期单胚的发育呈负相关；(3)CAT活性在0.86~2.81 U·mg-1·min-1之间，表现出升-降-升的变化趋势，在早期单胚形成时升至最高，在早期子叶胚形成时降至最低，表明其与早期单胚的发育呈正相关，而与中期单胚和早期子叶胚的发育呈负相关。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

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如果有任何问题，你可以随时联系我。