小孢子母细胞

初生造孢细胞经过有丝分裂，形成次生造孢细胞，然后次生造孢细胞发育成小孢子母细胞，小孢子母细胞经过减数分裂形成四分体，胞质分裂为同时型。

During the mitosis of microspore mother cells , the nucleus of tapetum divides into two . The primary sporogenous cells develop into microsporocyte by mitosis . The microsporocyte undergoes simultaneous meiotic division and produces tetrahedral tetrad .

在进行温度处理前，花药已发育到小孢子母细胞阶段。

Paraffin section observation showed that anthers were developed to the microsporocyte stage before treatments with different temperatures .

用孚尔根核染色反应处理DNA的变化：小孢子母细胞的核是鲜紫红色，细胞质无色；

The treatment with Feulgen reaction shows that the DNA of undergo the following change : The nuclei of microspore mother cells are of fresh purply red color and the protoplasms are colorless ;

杜仲（EucommiaulmoidesOliv）小孢子母细胞减数分裂属同时型。

The meiotic division of the microspore mother cell of Eucommia ulmoides Oliv belong to simultaneous type .

结论如下：在花药发育过程中，小孢子母细胞和四分体内的ATPase很少，仅在细胞核及小液泡中分布有少量的ATPase。

The results are as follows : During anther early development , only few ATPase precipitates located in small vacuoles and the nucleus of microspore mother cell and tetrad microspore .

三种松科植物（白皮松Pinusbungeana，油松pinustabulaeformis，白杄Piceameyeri）小孢子母细胞减数分裂中的次级配对和多极分裂现象

The Secondary Pairing and Multipolar Division in PMC Meiosis of Three Species ( Pinus bungeana , Pinus tabulaeformis , Picea meyeri ) of Pinaceae

通过检查小孢子母细胞减数分裂染色体行为和四分孢子行为，分析了热激或低温诱导产生2n花粉的细胞遗传学机理。

The cytogenetic mechanism of 2n pollen formation after heat-shock or low temperature treatment was determined on the basis of the behavior of meiotic chromosomes and sporads during microsporogenesis .

unicolor小孢子母细胞减数分裂异常进行了研究，发现存在不等二价体、同源染色体早分离、染色体桥、不均等分离、滞后染色体、核外染色体、微核等。

There were unequal bivalents , homologous chromosome deconjugation , chromosome brige , unequal separation , laggard chromosomes , chromosome outside nucleus , micronuclei and so on .

小孢子母细胞时期内质网和质体较多；

Many endoplasmic reticulums and plastids are present at microsporocyte stage .

芍药的小孢子母细胞减数分裂和花粉的发育

The microspore mother cell meiosis and pollen development of Paeonia lactiflora Pall

液泡在不育系与保持系小孢子母细胞中存在明显差异。

There were distinct difference on vacuole of CMS and maintainer line .

绒毡层为分泌型.小孢子母细胞减数分裂时，胞质分裂为同时型，小孢子呈四面体型排列。

Penetration into the cell ; The tapetum is of the secretory type .

小孢子母细胞发育为小孢子的过程为离心式发育，小孢子母细胞在同一药室内发育是不同步的。

The development of microspore mother cell was asynchronous in the same chamber .

马铃薯花药中的造孢细胞产生3～4层时，进而变成小孢子母细胞。

When sporogenous cells in potato anther produced 3-4 layers they became microsporocytes .

黑麦小孢子母细胞形成和发育过程中细胞胼胝质壁合成的变化

Change of callose wall synthesis during formation and development of microsporocytes in Secale cereale

（逐渐）减少，缩小收缩的小孢子母细胞中核进入减数分裂终变期。

The nucleus in shrinking cytoplasm of microspore mother cell enters into diakinesis stage.16 .

6小孢子母细胞期；

Microsporocyte phase ; 800 μ g / kg chromium picolinate for 6 weeks .

小孢子母细胞在减数分裂前期时开始积累肼胝质壁；

At the stage of meiosis prophase , microspore mother cell begin to accumulate callose wall .

小孢子母细胞减数分裂属于同时型，小孢子在四分体中的排列方式多数为四面体形，少数为十字交叉形。

Microspore mother cells meiosis was conformed to simultaneous type with mostly tetrahedral and decussate tetrad .

初生造孢细胞经过分裂形成次生造孢细胞，最后发育为小孢子母细胞。

The primary sporogenous cells divide into secondary sporogenous cells , and develop to microspore mother cells ultimately .

在异型孢子体种类中，可区分为大孢子母细胞和小孢子母细胞。

In theterosporous species , a distinction is usually made between megaspore mother cells and microspore mother cells .

小胞子母细胞减数分裂Ⅰ前期的凝线期至减数分裂Ⅰ的中期，普遍观察到小孢子母细胞间染色质胞间转移现象。

Intercellular migration of chromatin of microspore mother cells are generally observed from synizesis stage to metaphase of their meiosis I.

不同的花药或同一花药不同的小孢子母细胞减数分裂同步，偶出现不同步。

The tempos of microspore mother cell in different anther and in the same anther were in most cases highly synchronized .

初生造孢细胞直接行小孢子母细胞的功能，在小孢子囊中成单列。

The primary sporogenous cells functioned directly as microspore mother cells and were arranged in a single row in a microsporangium .

我们已对晋A细胞质雄性不育系进行了细胞生物学基础方面的研究，研究结果表明：晋A不育系的败育时期主要在造孢细胞增殖&小孢子母细胞形成时期。

We had found that the auxocyte abortion of Jin A took place at the stage of sporogenous cell division-microspore mother cells formed .

人工花粉萌发实验表明：小孢子母细胞减数分裂异常是导致花粉败育的主要原因。

The statistic of pollen germination rate showed that abnormal meiosis of pollen mother cells was chief reason which resulted in abortive pollen .

同一颖花不同花药之间及同一花药内多数小孢子母细胞的减数分裂存在不同步现象。

The non-synchronous phenomena on majority of microspore mother cells was exist among the anthers and within the same anther in the same floret .

小孢子母细胞是由次生造孢细胞分裂后发育而来的。其减数分裂中的胞质分裂为同时型，四分体的排列主要为四面体型，也有交叉型。

Will is primary . Cytokinesis of micro - sporocyte meiosis is simultaneous type and results in the microspore tetrad of tetrahedral and decussate .

线粒体和液泡结构异常可能是小孢子母细胞死亡造成雄性不育的细胞形态学特征。

These abnormal mitochondria and vacuoles may be associated with the death of microspore mother cell which leads to the male sterility in cotton .

所以，通过掌握银杏小孢子母细胞减数分裂进程及其与花芽外部形态的相关性，可通过观察花芽外部形态来及时判别减数分裂时期，以确定适宜的染色体加倍时期。

Therefore , we can easily identify the microsporocyte meiosis stage by its external morphology character , and determine the pollen chromosome doubling time correspondingly .