英语语法分析

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。

The fusion rate of the inactivated parental protoplasts was 3.31%.

所得双亲菌株原生质体的融合率为3.31%。

The protoplasts of attached cells are connected and integrated by plasmodesmata.

接触的细胞的原生质体通过原生质连丝连接成一体。