花粉

The pollen of the weed is the main sensibiligen of hay fever in human.

豚草是人类枯草热症主要致敏源。

Hummingbirds have discovered that nectar and pollen are very nutritious.

蜂鸟发现蜜和是很有营养。

He developed an allergy to pollen.

他对过敏。

Pollen morphology of Plumbaginaceae in China.

中国白丹科形态研究.

Hay fever sufferers have a worse time when the pollen count is high.

计数高时，枯草热患者日子就更不好过了。

The big,empty and abortive pollen grains are abserred at the stage of uninuclear microspore.

核期小孢子出现壁发育不良和巨大及现象。

Nectar and pollen are very nutritious.

蜜和是很有营养。

The exine is composed of tectum, columellae, foot layer and endexine.

外壁由顶盖层、柱状层、底层及外壁内层所组成。

The outer wall (extine) of the pollen grain is often diagnostic (see pollen) and very resistant to decay.

外壁（壁）通常为特异性并很难腐烂。

A mass of waxy pollen grains transported as a unit in many members of the Orchidaceae and Asclepiadaceae.

块 Pollinium (pl. pollinia) 在许多兰科和萝藦科植物中，作为传蜡质团。

Tapetum (pl. tapeta) A food-rich layer surrounding the spore mother cells in the anthers of vascular plants.

维管植物囊内包围孢子母细胞富含营养物质一层结构。

The pollen morphology of 10 species of Scorzonera genus in the Mongolian Plateau was observed by scanning electronic microscope.

用扫描电子显微镜观察了蒙古高原鸦葱属植物10个种形态。

Pollen mother cells undergo meioses through simultaneous cytokinesis and give rise to tetrads of microspores, which are tetrahedrally arranged.

母细胞行减数分裂，细胞质分裂属同时型，产生小孢子四分体，为四面体形。

(2) The pantoporate pollen of P. merrilliana shows that the species has vital taxonomical and evolutionary significance in Primula.

(2) 安徽羽叶报春散孔型显示其在报春属中有重要系统意义和进化意义。

The similarity of its heteropolar 3- or 6-aperturate pollen to the 3-aperturate pollen of Eudicots might result from convergent evolution.

其异极3沟或6沟型与真双子叶植物3沟相似是趋同演化结果。

Generative nuclei The two gametic nuclei formed by the division of the generative cell in the pollen tube of angiosperms.

在被子植物管中生殖细胞（应为雄原核译者注）分裂成两个配子核。

These results indicate that callose metabolism is active and very important not only in microsporogenesis but also in microgametogenesis in rice.

营养细胞细胞质中继续积累胼胝质，成熟对胼胝质在小孢子形成和发育过程中功能进行了讨论。

But fed with oakery pollen,indices as above were 9. 59 days, 37. 17 days, 3. 89 days,and 0. 86 per day,respectively.

而用青杠饲养，其发育历期长达9．59天，雌雄成螨寿命缩短为37．17天和3．87天，日平均产卵量仅0．86。

It indicated that the frequency of formation of the true pollen-derived plantletsw ere significantly low in the anther culture of B. napes.

这些结果说明在油菜药培养中可能有一少数植株形成。

As a result, this paper presents the 3D reconstruction segmentation display, and analysis results of pollen spore, chaperonin, head, cervical vertabra, tibia and carpale.

实现了孢子、分子伴侣、以及头颅、颈椎、胫骨、腕骨三维重建分析测量与分割。