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；
2
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。
3
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.