Abstract: When the embryo is proembryo in buckwheat ( Fagopyrum escidentum Moench.), the endosperm is free nuclear. When the embryo is at late globular stage, the endosperm starts to cellularize. When the embryo is heart shaped, the "open cells" of the endosperm are formed in the middle part of the embryo sac. At the stage of torpedo shaped embryo, many layers of endosperm cells in the middle part of embryo sac can be observed. The embryo is at cotyledon - curved stage and the chalazal endosperm haustorium, a trans-fer cell, is formed. The initial anticlinal walls of endosperm come from the freely growing wall and from the cell plates.

Key words: Fagopyrum esculentum

摘要： 荞麦原胚期，胚乳为游离核期。球形胚晚期，胚乳开始 细胞化。心形胚期，胚囊中部形成一层“开放细胞”。鱼雷形胚期，胚囊中部有5～7层胚乳 细胞。子叶弯曲胚期，胚乳全部形成胚乳细胞，具传递细胞特征的合点胚乳吸器形成。胚乳 细胞的初始垂周壁来自于自由生长壁和胞质分裂形成的细胞板；初始平周壁由自由生长垂周 壁分支相接形成，及有丝分裂的细胞板形成。开花后9 d，胚乳细胞积累淀粉，比胚细胞积 累早6 d。开花后15 d，胚乳最外层细胞积累蛋白质，而子叶细胞在开花后20 d积累蛋白质 。开花后25 d，子叶细胞中充满蛋白质体，而胚乳仅最外层细胞含很多的蛋白质体形成糊粉 层。

关键词: 荞麦, 胚和胚乳的发育, 贮藏营养物质的积累, 塑料切片及组织 化学技术