nucellar embryo是什么意思

网络释义

用法例句

Genesis and developments of megaspore and nucellar embryo in Jiaogan ;

蕉柑大孢子与珠心胚的发生发育

Ultrastructure of nucellar embryo initial and nucellar embryo and nucellar cell as well as ultracytochemical localization of ATPase activity in nucellar embryo of Xanthoxylum bungeanum Maxim were carried out by using transmission electron microscope.

应用透射电镜对花椒 (Xanthoxylum bungeanum Maxim)珠心胚原始细胞、多细胞原胚和此时期的珠心细胞及其 ATP酶的分布进行了详细的观察。

The central portion of an ovule in which the embryo sac develops;the megasporangium.

珠心胚珠的中心，胚芽囊在此发育；大孢子囊

The mean number of ovules per follicle was 10.59,n=320.

每心皮的胚珠数目为10.59（根据320个心皮中胚珠的平均数）。

The region of an ovule that is opposite the micropyle, where the integuments and nucellus are joined.

合点珠孔对面的胚珠内结合珠被和珠心的一个区域

The cells of the integument and nucellus of some plants form perfectly normal embryos.

某些植物的珠被和珠心细胞形成完全正常的胚。

being or of the nature of an ovule.

胚珠的或有胚珠特点的。

The nucellus is usually degraded and absorbed as the endosperm develops.

珠心通常在胚乳发育时被分解和吸收。

Chalaza (pl.chalaxae or chalazas) The region of an angiosperm ovule where the nucellus and integuments merge.

合点：被子植物胚珠上的一个区域，在合点处珠心和珠被愈合。

Studies on Nucella PCD and Endosperm Cells Construction during the Development of Endosperm of Rice;

水稻胚乳发育中珠心凋亡与胚乳细胞构建的研究

A minute structure in seed plants, containing the embryo sac and surrounded by the nucellus, that develops into a seed after fertilization.

胚珠种子植物的一个小的结构，含有胚囊并被珠心所包围，施肥后长成种子

the scar on certain seeds marking its point of attachment to the funicle.

种子上的疤痕，系胚珠于胚珠柄的痕迹。

Food materials may be stored in a special tissue derived from the nucellus, called the perisperm.

营养物质可以贮藏于由珠心产生的一种特殊组织，叫外胚乳。

One of the structural units of a pistil, representing a modified, ovule - bearing leaf.

心皮雌蕊的结构单位之一，表示一片变异的、含胚珠的叶子

Green Gram s ovary consists of singe carpel, one locule, cantaining9-13 campylotropous ovules bearing at the marginal placentation.

绿豆子厉由单心皮构成,1室,有9—13个弯生胚珠着生在边缘胎座上。

development of flower and ovule

花及胚珠发育的时间表

The scar on a seed, such as a bean, indicating the point of attachment to the funiculus.

种脐种子（如豆）上的疤痕，系胚珠于胚珠柄的痕迹

The occurrence of more than one embryo in the ovule denotes polyembryony.

在胚珠中有一个以上的胚发生是表示多胚现象。

Study on the Development of Ovule, Endosperm and Embryo in Stenospermic Seedless Grapes;

种子败育型无核葡萄胚珠、胚乳及胚发育的研究

(of a plant ovule) completely straight with the micropyle at the apex.

（指植物的胚珠）珠孔完全直向顶点。