栽培甜菜中央细胞受精前后的超微结构
李伟1,2, 申家恒2,*, 郭德栋3

Ultrastructure of Central Cell before and after Fertilization in Sugar Beet (Beta vulgaris)
LI Wei1,2, SHEN Jia-Heng2,*, GUO De-Dong3
图版I 两个极核阶段中央细胞的结构 A: 细胞化时期胚囊的半薄切片, 示中央细胞的上、下极核Bar = 5 μm; B~D: 上极核的超微结构, 图B示上极核Bar = 1 μm; 图C、D示上极核周围胞质中的内质网和高尔基体Bar = 500 nm; E~G: 胚囊珠孔端的超微结构, 图E示中央细胞与珠孔端细胞Bar = 2 μm; 图F、G示中央细胞与珠孔端细胞之间的细胞壁箭头示胞间连丝图F, Bar = 1 μm; 图G, Bar = 500 nm。H: 下极核的超微结构Bar = 1 μm; I: 反足细胞的超微结构Bar = 2 μm。
Plate I Structure of central cell at the stage of two polar nuclei A: semi-thin section of cellularization embryo sac, showing the upper and lower polar nuclei Bar = 5 μm; B–D: ultrastructure of upper polar nuclei; B: upper polar nuclei Bar = 1 μm; C–D: endoplasmic reticulum and Golgi around upper polar nuclei Bar = 500 nm; E–G: ultrastructure of embryo sac at micropyle end; E: central cell and cells at micropylar end Bar = 2 μm; F–G: cell wall between the central cell and the cells at micropylar end, plasmodesmata is shown by arrows F, Bar = 1 μm; G, Bar = 500 nm; H: ultrastructure of lower polar nuclei Bar = 1 μm; I: ultrastructure of antipodal cell Bar = 2 μm.