In addition to phragmosome formation, preprophase is characterized by the formation of a ring of microtubules and actin filaments.

除了组块形成外，前期还以微管环和肌动蛋白丝的形成为特征。

Cortical microtubules were observed in intraepidermal cells of onion bulb with a thin section and negative staining of protoplasts.

洋葱鳞茎表皮细胞内可见皮层微管，呈薄片状，原生质体染色阴性。

Numerous microtubules gathered around the nucleus.

微管以核周为主。

Here, mitochondria and microtubules are colored green.

这里，线粒体和微管被标上了绿色。

Figure GTP hydrolysis controls the growth of microtubules.

GTP水解控制微管的生长。