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以长春密刺黄瓜为材料,采用石蜡切片法对黄瓜胚胎的发生发育过程进行了研究。解剖学观察表明:黄瓜从雌花显蕾到种子发育成熟需经历60d左右,其间雌配子体发育经历18～20d形成成熟蓼型胚囊,开花前10d进入单核胚囊期,开花前7d左右出现二核胚囊,开花前3d出现四核胚囊,开花前1～2d形成八核成熟胚囊。受精过程在授粉后第2～3天完成。胚胎的发育经历3个阶段,授粉后2～11d为原胚期,11～25d为胚器官剧烈分化期,25～40d为胚器官的进一步充实分化期。胚胎发育过程中胚乳被吸收,最终形成无胚乳种子。
Using the cucumber of Changchun as the material, the development and development of cucumber embryo were studied by paraffin section method. Anatomical observations showed that the development of mature cucumber from the female flowers to mature need to go through about 60d, during which female gametophyte development experienced 18 ~ 20d to form mature embryo sac of the Polygonum, 10d before flowering into the mononuclear embryo sac, about 7d before flowering appeared two Nuclear embryo sac, quadrupeduclear embryo sac appeared three days before flowering and octopronuclear mature embryo sac formed 1 ~ 2 d before flowering. Fertilization process in pollination after 2 to 3 days to complete. Embryonic development experienced three stages, 2 ~ 11d after pollination for the embryo stage, 11 ~ 25d for the embryonic organ violent differentiation period, 25 ~ 40d for the further enrichment of embryonic differentiation. The endosperm is absorbed during the development of the embryo, eventually forming an endosperm seed.