查询词典 pollen tube

It is motile and is produced in an antheridium, except in certain gymnosperms (e.g.Cycas, Ginkgo) in which antherozoids develop from the generative cells of the pollen tube.

除了在一些由花粉管的生殖细胞产生配子的裸子植物中（铁树 Cycas，银杏 Ginkgo ），通常是由精子器产生的并且会游动。

They may represent what remains of the archegonium in angiosperms and the pollen tube may penetrate a synergid first, but they do not participate in the fertilization process and abort soon afterwards.

它们扮演了残留的被子植物藏卵器的角色。花粉管可首先穿透其中一个助细胞，但助细胞并不参与到受精过程中去，而且随后会消亡。

Unicolor in autogamy shows different the seed-setting percentage in different pollinating methods, with the result as the higher rate of self-fruitfulness through xenogamy. Based on hybridization, genetransferring through pollen-tube pathway to Lilium davidii van Unicolor is researched. The master of basic technique of exogenous DNA transferring to Lilium davidii var.

在进行了有性杂交的基础上，选取具有较高结实率的兰州百合作为受体，利用花粉管通道导入法，对一些百合品种的总DNA在在兰州百合中进行了初步研究，基本掌握了在兰州百合中进行外源DNA导入的基本操作方法，提供了一组以结实率和有胚种子率为标准的优化参数。

It plays a key role in the process of cell division, cell movement, pollen tube elongation and so on.

ADF蛋白是一种在真核生物中广泛存在的低分子量的肌动蛋白结合蛋白，在细胞分裂、细胞运动、花粉管伸长等重要的生命活动中发挥着重要的作用。

Chalazogamy A method of fertilization in angiosperms in which the pollen tube enters the ovule by the chalaza instead of through the micropyle, penetrating the placenta en route.

合点受精：被子植物的一种受精方式，花粉管是通过合点部分而不是通过珠孔进入胚珠的。

Pollen-tube growth down the style is both positively and negatively chemotropic; the tube grows toward chemicals secreted by the pistil, and away from atmospheric oxygen.

花粉管沿着花柱的生长是既有正向性也有负向性的：花粉管向着由雌蕊分泌的化学物质生长，同时远离空气中的氧气生长。

The pollen tube may grow down the stylar canal , or it may secrete enzymes that digest the tissue of style , creating a path for the tube .

花粉管可能沿着花柱道向下生长，也可能分泌消化酶分解花柱组织，为花粉管创造一个通道。

Specific recognition and degradation of stylar S-RNase for self-pollen tube RNA, resulted in the stop of self-tube growth in Prunus mume. The recognition specificity of stylar S-RNase for the RNA weakened with the rise of temperature, consequently regulating the self-incompatibility reaction in Prunus mume.

果梅花柱S-RNase特异性识别并降解自花花粉管RNA，导致自花花粉管停止生长；随着温度的升高花柱S-RNase对花粉管RNA的识别特异性减弱，从而调节果梅的自交不亲和性反应。

CaM may be involved in regulating suchevents as microspore development, pollen germination, pollen tube growth,fertilization, and substance transport during sexual plant reproduction through〓/CaM -mediated signaling pathways.

钙调素可能通过〓／CaM信号传递途径调节小孢子发育、花粉萌发、花粉管生长、受精以及物质运输等生理过程。

Exam ination ofin vitrogerm ination of these 2n pollen grains revealed that the ir germ ination percentage and pollen tube elongation rate were w ith in the norm a...

初步观察了2n花粉离体萌发状况，其萌发率与花粉管伸长速度较为正常，但萌发启动比单倍性花粉慢。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。