查询词典 microspore

The aim of this study is to reveal the disinfectants and disinfection methods, medium components, and embryoid culture method on dissociative microspore culture.

［目的］研究消毒处理方式、培养基成分和胚状体培养方法对油菜游离小孢子培养的影响。

Objective］The aim of this study is to reveal the disinfectants and disinfection methods, medium components, and embryoid culture method on dissociative microspore culture.

［目的］研究消毒处理方式、培养基成分和胚状体培养方法对油菜游离小孢子培养的影响。

The primary results could be summarized as follows: The result of flower developing showed that the flower bud morphological differentiation way is form a leaf bud with a flower bud; The process of microspore occurring and male gametocyte development is normal,the development of anther wall is elementeny type.

结果如下：花发育的研究表明，安祖花的花芽分化是以一叶芽一花芽的方式进行；小孢子与雄配子体的发育过程均属于正常发育，花药壁的发育属于基本型，绒毡层细胞属于腺质绒毡层，成熟的花粉粒为2-细胞型。

Isolated Microspore culture is one of the methods to obtain haploid.

摘要游离小孢子培养技术是获得大白菜单倍体植株的有效途径之一。

Megaspore mother cell just enters leptotene as The meiosis of microspore mother cell develop into tetrads . The meiosis of megaspore mother cell develop into pachytene while that of microspores develop into a single nuclear adjacent to cell wall.

当白杨小孢子母细胞减数分裂至四分体时，大孢子母细胞开始进入减数分裂细线期；而当小孢子发育至单核靠边期上时，大孢子母细胞减数分裂达到粗线期。

Paeoniaceae,a monomarphic family,has distinctive characters for its phylogeny in Angiosperm,such as:both of tapetum and microspore mother cell are homologous,and so are nucellus cell and macrospore mother cell;there are many macrospore mother cells.

芍药科Paeoniaceae为单属科，其系统发育具有一系列的独特性，在被子植物中是独一无二的。

2The mother cells of macrospore and microspore directly go mitosis by-passed meiosis to form normally fertility gametes.

分析其主要原因在于：①雌配子不育；②雄配子不育；③雌雄配子之间的亲和性障碍；④雌雄配子发育不同步；⑤单受精。

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

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。

2It is practical that triploid white poplars induced by the chromosome doubling of megaspore based on the development of microspore.

2通过小孢子发育进程参照系的设立，实现了大孢子染色体加倍诱导白杨三倍体技术的实用化。

Now the research has made progress.(1) The meiosis stages of megaspore could be discriminated timely through observing the meiosis of microspore under the same environmental conditions, according to the association of female and male buds during development.

1首次提出利用雌、雄花芽发育进程的时序性相关性，以相同生境以及培养条件下的小孢子发育进程为参照，从而相对准确地实现白杨大孢子母细胞减数分裂进程即时判别的技术方法。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。