companion cell

companion cell的基本解释

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伴细胞

与companion cell相关的网络例句 [注：此内容来源于网络，仅供参考]

There was lots of organelle, such as rib somes, mitochondria in companion cell during the mature stage of SE. Also the plasmodesmata appeared in cell wall between SE and CC.

在筛管成熟期间，伴胞的细胞质较浓，内含辜富的核糖核蛋白体、线粒体等细胞器，与筛管相连的细胞壁上具有胞间连丝。

Companion cell An elongated thinwalled cell cut off longitudinally from the same meristematic cell as the SIEVE ELEMENT with which it is closely associated.

伴胞：与筛管分子侧面相邻的一种细胞，和筛管间有密集胞间连丝，它与筛管是由分生组织的同一个母细胞不均等分裂发育而成。

Subcellular localization of ATPase activity in the flesh of developing apple fruit was carried outusing a lead phosphate precipitation technique via electron-microscope. The ultrastrcture of phloemand its surrounding cells was also observed. The results showed that ATPase activity wasdominantly localized on the plasma membranes of sieve element/companion cell complex.

应用铅沉淀的细胞化学方法，研究了发育过程中苹果果肉内卸载区(韧皮部及其周围薄壁细胞)ATP酶的亚细胞分布和变化，并且，作为补充，观察了韧皮部及其周围薄壁细胞的超微结构。

The results displayed the symplasmic isolation of sieve element/companion cell complex from the surrounding parenchyma cells, and suggest that the photoassimilate unloading from phloem follows an apoplasmic pathway and must be facilitated via the sugar transporters.

由此可见，苹果果实韧皮部组织同周围薄壁组织存在共质体隔离，同化物必须通过糖转运蛋白的介导从筛分子以跨越质膜的方式卸出到质外空间，然后再装载到周围薄壁细胞中。

The ultrastructural changes during the development of sieve element companion cell complex (SE/CC complex) in Populus deltoides were investigated using electronic microscopy. The result showed that SE and CC tome from the same secondary phloem mother cell. The development of sieve element went through three stages, i. e. immature, mature, and degenerate stage. In immature stages the sieve element presented radial expansion, cell wall thickening, and production of sieve plastid and P-protein. The cytoplasma selectivly autolysed in mature stage. At the same time, karyoplasm was dispersed, and nuclear envelope was not clear, or karyoplasm was disorgnized, and nuclear envelope was clear. The karyopalsm finally turned into P-protein. In degenerate stage, the cytoplasm completely disappeared, and the function was lost.

利用电镜技术研究美洲黑杨次生韧皮部筛管和伴胞发育过程中细胞超微结构的动态变化，观察到筛管和伴胞由同一个次生韧皮部衍生细胞分裂分化形成筛管约发育历经未成熟期、成熟期和衰退期的变化未成熟期筛管分子表现为细胞的径向扩展、壁的增厚、筛管质体和P-蛋白质的产生；成熟期筛管分子细胞组分发生选择性自溶，细胞核核质弥散状，核膜不清晰，或核膜清晰而核物质降解，最后细胞核完全解体转化为P-蛋白质类的物质；衰退期筛管分子细胞质完全解体消失，失去功能。

与companion cell相关的网络解释 [注：此内容来源于网络，仅供参考]

companion cell：伴胞

脱分化3.筛管(sieve tube)和伴胞(companion cell):筛管分子在发育早期阶段,细胞中有细胞核、浓厚的细胞质、线粒体、高尔基体、内质网、粘液体等细胞器存在.

companion cell：伴细胞

communicable disease 传染病 | companion cell 伴细胞 | comparative anatomy 比较解剖学

companion cell：伴细胞,伴胞

compact bone 密质骨 | companion cell 伴细胞,伴胞 | compatibility 相容性,亲和性