The morphology and size of the filiform apparatus change with the development period of the synergids.
助细胞的丝状器在不同发育时期形态及大小不同；
A mature embryo sac is composed of egg apparatuses (two synergids and one egg cell), central cells and three antipodal cells.
成熟胚囊包含卵器(由两个助细胞、一个卵细胞组成)，中央细胞及三个反足细胞。
Three kinds of abnormal phenomena of double egg apparatuses (71.4%), three egg apparatuses (17.5%) and no synergids (11.1%) were found in the varied sacs.
