Plasmodesmata in the chalazal end wall as a site for symplastic transportation between nucellar cells and embryo sac only appear in functional megaspore and 1-nucleate embryo sac at early stage.

• 在功能大孢子及单核胚囊早期是通过合点端的胞间连丝与珠心细胞以共质体形式相通；