花粉

The pollen of approximately 400 species was observed by optical microscopy. In the meantime, the pollen of Punicaceae and Aceraceae was studied by scaning electron microscopy.

在对研究区近400种植物的花粉进行光学显微镜观察研究的同时，还用电子显微镜对收集比较集中的石榴科及槭树科的花粉进行了系统的研究。

The anther was shriveled, dwindled to be acerate shape and fade, and the length of filament was shortened. There was no pollen or only shrunken, malformed and aborted pollen.

油菜花药皱缩干秕呈针状、颜色变浅、花丝缩短，花药无花粉或为空秕、畸形的败育花粉。

It is the first time that these phenomena were observed: Two nuclei are surrounded by plasma and locate at the central of the female gametophyte and the others nuclei are positioned at the fringe of the female gametophyte; Before the pollen tube enters the female gametophyte. the nuclei in chalazal end begin splitting of plasma and form multinuclear cell.4. The pollens of Gnetumc are spherical or applanate with single aperture. The ornamentation of exine is spine. The basis part of spine is lenience and the top part of spine is tip or obtuse sphere.

首次在买麻藤属植物的雌配子体中观察到2个游离核位于配子体的中央位置，且被一团原生质所包围的，其余的游离核位于边缘的现象以及花粉管进入雌配子体前，合点端的核已经发生胞质分裂形成多核细胞的现象 4、买麻藤的花粉近球形或扁平型，有单萌发孔，外壁表面具小刺状纹饰，小刺基部宽大，末端尖或钝圆。

Microscopic observation on anther development process of cytoplasmic male sterile line"1815A"showed that its anther development was inhibited at the stage of archesporial cell differentiation.

以1815A不育系对应的保持系1815B作对照，对不育系进行细胞学观察，结果表明：随着花蕾的发育，败育的雄蕊一直处于孢原细胞时期，不能形成花粉囊并产生花粉母细胞，但雌蕊和维管束组织发育正常。

The results show that the normal process begins with archesporial cell and undergoes stages of primary and secondary sporogenous cell,microspore mother cell,dyad,tetrad,central nucleus microspore,vacuolated microspore,mature microspore,twocell pollen and threecell mature pollen.

对平流层辐射处理SP3谷子和对照CK3谷子雄性细胞发育的研究表明，雄性细胞正常发育过程从孢原细胞开始，经初生造孢细胞、次生造孢细胞、小孢子母细胞、二分体、四分体和单核小孢子中央期、单核小孢子液泡期、单核小孢子成熟期直到二细胞花粉、三细胞成熟花粉结束。

The pollen is malformed, unstained, and small in the KI-I2 solution. The anther dehiscence is in advance at the bicellular pollen stage.

结果表明： 1、不育花药白色，花药在二孢花粉期提前开裂；最后形成的花粉小而畸形，碘液不染色。

Immunocytochemistry further revealed that the proteins encoded by these genes accumulated inthe elongating and condensing generative nucleus during development of bicellular pollen, and weremost abundant in the two sperm nuclei within an elongated pollen tube.

免疫细胞化学进一步显示，该编码的蛋白是由这些基因的累积inthe拔节和冷凝生成核的开发过程中bicellular花粉，并weremost丰富，在两个精子细胞核内的一个狭长花粉管。

Once the panicle stops developing, all anthers are in developing from 4th stage to early binucleate for about 1 month.

台湾泡桐之花粉发育与花序之开展有关，当花序中花芽仍处在继续生长状态时，花粉母细胞、四分子及单核初期至中期均可在同一花序之花芽中观察到。

The result showed that the key stage of sterility was the late binucleate stage.2.158 candidate bands generated by cDNA-RAPD (random amplified polymorphic DNA) were recovered from denatured polyacrylamide gel.

主要结果如下： 1、对喷施化学杂交剂BAU9403的农大3159进行细胞学水平观察发现，花粉的发育加快，提早解体，败育发生的关键时期是花粉二核期后期。

Whereas, the tapetum of Zhenshan 97A disaggregated at the pollen mother cell stage, the nuclear membrane and the cell membrane disaggregated, the phenomena continued to the binucleate pollen stage. The cytoplasm of the tapetum cells of Zhenshan 97A deposited a few Ca^2＋ precipitates at the pollen mother cell stage.

珍汕97A绒毡层细胞从花粉母细胞时期开始，细胞质内有少量颗粒状的Ca^2＋沉淀；减数分裂时期，绒毡层细胞的内切向壁表面有大量大颗粒的Ca^2＋沉淀；单核花粉时期绒毡层细胞周围集聚一层Ca^2＋沉淀。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。