查询词典 pollen tube

When pollen germinates on a stigma the growing pollen tubes deposit callose as small plugs, but if the plant is self-incompatible, tubes from its own pollen will deposit more callose, which then blocks the tube, preventing fertilization.

当花粉在柱头上萌发时，生长的花粉管产生少量胼胝质，但如果该植物是自交不亲和的，那么花粉管将产生比较多的胼胝质，可以阻塞花粉管来阻止受精。

So it is suggested that the maintanance of appropriate Ca〓 level in the germinating pollen is essential for normal catabolism of lipids during pollen germination and tube growth, and CaM is also involved in these processes.

因此在萌动的花粉中保持适当的Ca〓水平对正常的脂类和脂肪酸代谢是必需的，CaM也参与此过程的调控。

Stamens 5, usually inserted at base of corolla tube and adhering to stigma head to form gynostegium; filaments usually connate to form a tube enclosing ovaries; anthers 4-celled (Periplocoideae and Secamonoideae) or 2-celled, often with a membranous apical appendage; pollen tetrads contained loosely on a spatulate translator with a basal corpusculum, or pollen united into waxy pollinia, each attached through a caudicle to the retinaculum between adjacent anthers to form a pollinarium, pollinia 2 or 4 per pollinarium.

雄蕊5，着生于花冠筒的基部，与柱头贴生，和柱头粘生，形成合蕊柱；花丝通常合生成管包围子房；花药4室(Periplocoideae和Secamonoideae)或者2室的，通常有一膜质的顶端附属物；四合花粉松散地着生于匙形的载粉器上，具有着粉腺体，或者花粉合生成腊质的花粉块，通过花粉块柄与系接于着粉腺上，每个花药有花粉块2个或4个。

The results of studying the effects of several plant growth regulating substances on pollen germination and tube growth in pear (Pyrus serotina Rhed.) by cultivating pollens in liquid media showed that GA3,TRIA,IAA and 2,4D stimulated pollen germination and tube growth when pollen was cultivated in their lower concentration media.

采用花粉液体培养法研究了植物生长调节物质对梨花粉萌发和花粉管生长的影响，结果表明：较低浓度的赤霉素、三十烷醇、吲哚乙酸及2，4-D均能促进花粉萌发和花粉管生长，而超过一定浓度时却起抑制作用，最适宜于花粉萌发和花粉管生长的赤霉素浓度为50～300mg/L，三十烷醇为3～100mg/L，吲哚乙酸为5～25mg/L，2，4-D为5～10mg/L。

Pollen tube growth is stimulated by auxin and its production by developing seeds stimulates fruit set and pericarp growth in fleshy fruits.

花粉管的生长也是通过生长素刺激的。

The results showed that pollen in differentfamily or genus of plant have different requirements for phytohormones.The basicmedium of pollen culture supplemented with 2ppm NAA and GA_3 can promotes thepollen germination in Cruciferae.It has been proved that basic medium supplemtedwith 2ppm IAA and GA_3 has special effect on pollen germination and elongation ofpollen tube of woody plant in Rosace...

结果证明：不同科属的植物花粉对激素的要求不同，如在花粉萌发的基本培养基上加2ppm的NAA和GA_3混合液对十字花科植物花粉有促进作用，加2ppm的IAA和GAa_3混合液对蔷薇科木本植物花粉萌发和花粉管伸长有显著效果，而葫芦科植物的花粉在基本培养基上只要有无机盐离子就可以萌发，激素仍有促进花粉萌发的作用。

The screening of progenies derived from pollen tube pathway transformation of soybean with PCR is simple, fast and economic.

用PCR法筛选花粉管通道法转化的后代，具有简便、快速、经济等优点。

Besides playing an apparently key role in wall expansion, expansins have been implicated in an increasing number of processes including cell enlargement, seed germination, root hair formation, root growth, leaf primordium initiation,leaf growth, softening of fruits, fruit abscission and growth of the pollen tube of grasses through the stigma and the style.

目前认为扩张蛋白几乎参与了植物的整个发育过程：除具有增大细胞的功能外，扩张蛋白在细胞生长、种子萌发、根毛形成、根系生长、叶原基形成、叶子生长发育、果实成熟、器官脱离，以及花粉管生长方面起着重要的作用。

By means of gene engineering of plant, exogenous DNA from milk vetch was directly induced into tobacco variety CoKer319 through pollen tube.

以外源紫云英DNA 为供体，通过花粉管途径直接导入烤烟品种 Co Ker319，处理的烟株后代部分根系出现结&瘤&现象。

The expression of phosphorylase gene in stigma and style may beinvolved in regulating glucose metabolism and glucoprotein synthesis during pollengermination and pollen tube growth.

磷酸化酶基因在柱头和花柱中的活跃表达可能与花粉萌发和花粉管生长过程中的葡萄糖代谢和糖蛋白合成有关；磷酸化酶可能参与雌蕊及颖果发育过程中过渡性淀粉和储藏性淀粉的合成、分解和转运。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。