查询词典 protoplasm

Many tracheids lack protoplasm at maturity and have lignified secondary cell walls.

许多管胞的原生质体会在成熟时消失，同时细胞壁进行木质化的次生加厚。

Other possible gravireceptors are stretch-activated ion channels in membranes, which may sense movement of the protoplasm in response to gravity.

另外一种重力感受器是膜上被激活的呈开放状态的离子通道，它们可以感受到在重力作用下的原生质体的移动。

They are usually associated with specialized parenchyma cells called COMPANION CELLS, whose protoplasts are connected with the protoplasm of the sieve tube by plasmodesmata.

筛管常与特殊薄壁细胞相联系，这种细胞被称为伴胞，其原生质和筛管内的原生质有丰富的胞间连丝相通。

The progress of studies on Stylosanthes in the aspects of stylo anthracnose caused by the fungus Collectotrichum gloeosporioides and its genetic diversity and epidemiology, breeding, cytogenetics, cytobiology, tissue culture, protoplasm fusion, gene clone, genetic transformation, classification and molecular makers was reviewed in this paper.

摘要综述了柱花草的炭疽病危害、炭疽病原菌的遗传多态性及流行性、柱花草的抗炭疽育种、细胞遗传学、细胞生物学、柱花草组织培养、原生质融合、基因克隆、遗传转化、柱花草分类、分子标记、航天辐射育种等方面的研究进展。

Observation on the ultrastructure of the radicle cell of cabbage seeds indicated that the ultrastructure changed with the seed vigor reduced, such as the segregation of cytoplasm from the cell wall, the fragmentation of cell membrane, the vesiculation of protoplasm, the homogenization of chromation, the disintegration of cytoplasm, the distinguishing of nuclear membrane and nucleous ,and so on.

胚根细胞亚显微结构电镜观察结果，甘蓝种子通过人工老化活力降低后，胚根超微结构发生了变化，主要表现为：质壁分裂，细胞膜内陷或局部断裂，细胞质空泡化，细胞器难以辨认，染色质均质化，核仁和核膜的界限模糊等现象。

Later at zygotene and pachytene stages, the hydrolases were released directly from the SER cisternae via fusing with the PM and caused cell wall degradation to form cytoplasmic channels. Sometimes cytomixis via CCs was observed. The possible functions of CC were to maintain the balance of protoplasm between different cells and relate to the growth and heredity of the whole population of PMCs.

细胞器及核物质通过胞质通道在细胞间可以进行转移运输，认为胞质通道的功能可能是在维系着细胞间的包括细胞器和细胞质在内的物质平衡以及与整体的发育和遗传有关。

Symbol P A highly reactive, poisonous, nonmetallic element occurring naturally in phosphates, especially apatite, and existing in three allotropic forms, white, red, and black. An essential constituent of protoplasm, it is used in safety matches, pyrotechnics, incendiary shells, and fertilizers and to protect metal surfaces from corrosion.

符号 P 磷：一种易起化学反应的、有毒的非金属元素，常在磷酸盐中天然存在，尤其是磷灰石，以三种同素异形的形式存在，为白色，红色和黑色，是原生质的基本成分，可用于安全火柴、烟花、燃烧弹和化肥，还可以保护金属表面免于腐蚀。

By using antimonate potassium cytochemistry method, we found that antimonate calcium precipitates existed only in the cell wall rather than the protoplasm and showed a tip to base gradient in the cell wall of hyphal tips, i.

焦锑酸钾电镜细胞化学定位揭示焦锑酸钙沉淀颗粒仅存在菌丝细胞壁中，呈顶端到基部的极性分布。

The streaming rotary motion of protoplasm within certain cells and one - celled organisms.

女孩泪流满面，央求让她不声不响地到押车员车厢里去算了。

Two whiplike threads of protoplasm reduced a microscopic scale .

原生质的两条极的鞭形螺纹；减小极小的比例。

We are forbidden from giving money to these shoeless, skinny children, as this will perpetuate begging.

向光着脚，骨瘦如柴的孩子施舍是不可以的，因为要招来无休无止的乞讨。

It would be hard not to fall victim to some sharpeyed policeman.

要想不被某个目光锐利的警察抓到，谈何容易。