High activity of ACPase was observed in the multiple concentric structures in the degenerating cytoplasm, but such structures were not present in the undegenerated nucellar cells.

• 电镜细胞化学定位也表明退化珠心细胞质中有强烈的酸性磷酸酶活力,它们存在于多层环状的胞质结构中,而远离胚囊的非退化珠心细胞中无上述结构,酸性磷酸酶活性仅出现于液泡中。