细线期

Some new organizational patterns of microtubules (that have not been described before) were observed during microsporogenesis, including the existence of a broad band of perinuclear microtubules at the diakinesis stage of development.

主要包括：(1)在细线期，从核膜向胞质衍射的微管呈螺旋状，显示核具旋转功能；(2 )在偶线期，微管的分布呈极性分布现象；(3)在终变期，核被一组微管形成的宽带围绕着。

Prophase may be divided into successive stages termed leptotene, zygotene, pachytene, diplotene, and diakinesis.

前期可被分为连续的阶段：细线期、偶线期、粗线期、双线期和终变期。

ResultsAll dividing stages （leptotene, zygotene, pachytene, diplotene stages and diakinesis） were observed in low power lens and those divi- ding stages increased greatly compared with the routine method.

结果 低倍镜下可见细线期、偶线期、粗线期、双线期、终变期细胞，各期细胞染色体分裂相较常规制片明显增加。

Centromeres could be identified easily on the bivalents at diplotene, so it was convenient to analyse the karyotype.

结果表明，日本沼虾染色体数n=52，2n=104，据双线期二价体的相对长度、着丝点位置以及形态诸方面的特点分析了核型，共分为A，B，C，D4个染色体组，核型组成是N=37M+4ST+11T；初级精母细胞减数分裂前期I可分为细线期/偶线期、粗线期、双线期和终变期5个时期，双线期的二价体存在弥散阶段，核仁明显，且双线期二价体着丝点清晰，给核型分析带来了方便。

The results as follows: Chromosomal axial cores formed during leptotene nuclei in spermatocytes of the brown rat, some homologous axial cores were close to each other. The fomation of SCs starts at zygotene, completed at pachytene and disintegrates at diplotene.

在褐家鼠精母细胞的细线期，常染色体轴心（Axial cores， ACs ）已形成，同源轴心在空间上靠近，偶线期SCs 开始形成，到粗线期SCs 完全形成，于双线期SCs 开始解体。

It is subdivided into:① leptotene.

它又细分为：①细线期。

Here we show that the inner nuclear membrane protein SUN1 specifically associates with telomeres between the leptotene and thediplotene stages during meiotic prophase I.

我们发现内核膜蛋白SUN1从减数分裂前期Ⅰ的细线期到终变期，特异性的与染色体端粒相结合。

According to the ultrastrucral observation of PMCs, three successively specific phases could be distinguished as leptotene, zygotene and pachytene in early prophase Ⅰ of Arabidopsis.

通过对拟南芥菜减数分裂前期花粉母细胞的形态学观察，我们认为在早前期Ⅰ中，拟南芥菜又可以分为三个时期：细线期、偶线期和早粗线期。

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。

At interphase, there is no cytoplasmic channel in the cell walls of PMCs; At zygonema and pachynema, a lot of cytoplasmic channel, ranging in diameter from 150nm to 600nm, appears; After pachynema, the number of channels decrease rapidly.

在间期的花粉母细胞间未见胞质通道，胞质通道在偶线期前后形成并开放，在粗线期以后迅速减少。在细线期和偶线期，花粉母细胞细胞质膜与细胞壁之间的质外体出现大量的小泡，即所谓的壁旁体。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。