It fills and expands the apical portion of the cell and forces the nucleus into the slender basal portion . 它充满并推向细胞的顶部,迫使核移向狭窄的基部。
Foot the basal portion of an embryo , sporophyte , or spore - producing body , which is embedded in the tissue of the parent 基部:胚胎、孢子体或产孢体的基部,包埋于母体组织中。