The mycorrhizal fungi affects the size and shape of the host cell nucleus.

春兰菌根真菌对其宿主的细胞核大小及形状有一定的影响。

youdao

In this case the shape is - there's a cell body in the center here so this is where the nucleus is and where all the transcription, production of proteins take place here.

在这个细胞中,中间部位是细胞体,细胞核位于其中央,转录以及翻译过程均发生于此

耶鲁公开课 - 生物医学工程探索课程节选