All nucellar cells disappear, when an embryo sac is ripe.
属薄珠心，胚囊形成时珠心细胞全部消失。
Their origins were assured to be from nucellar cells in ovule.
其不定胚起源于胚珠内的珠心细胞。
Programmed Cell Death of the Nucellar Cells in Ginkgo biloba L.
银杏珠心组织得细胞程序化死亡。
The nucellar epidermal cell cuts off several layer nucellar parietal cells.
珠心表皮细胞平周分裂产生多层珠心周缘细胞，为厚珠心。
Activation of nucellar cells by discharge from the pollen tubes has been claimed.
认为由花粉管得流出物能使珠心细胞活化。
Embryo sac lies on the top of nucellar. Nucellar tissuesunder ovule form nucellar colum.
胚囊位于珠心顶部，胚囊下方得珠心组织形成珠心柱。
The nucellar embryo suspensor, its development passed through the similar stages of the zygotic embryo.
珠心胚发育经历与合子胚相同得发育阶段。
At the mature embryo sac stage, some nucellar cells at the chalazal region differentiated into hypostase.
成熟胚囊期, 合点端部分珠心细胞特化为承珠盘。
Mature ovule was componented of nucellus, integument, bead handles, combined point and composition of the nucellar beak.
成熟的胚珠是由珠心、珠被、珠柄，合点和珠心喙组成。
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