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根据这两年对籼、粳稻开花后不同发育期种胚分化发育过程中胚重、胚体积及细胞数的变化规律,以及蛋白质、核酸、淀粉等大分子物质动态的观察结果,说明稻胚分化各器官原基时期,胚重、胚体积及细胞数均呈指数增长趋势,开花后11～13天左右器官原基分化完成时,细胞数和DNA、RNA含量均趋于稳定,而RNA在经过短时间稳定后却再次增长,种胚干重和蛋白质含量基本上随着RNA含量起相应变化,并持续到成熟前数天。
According to the changes of embryo weight, embryo volume and cell number during the differentiation and development of embryos at different developmental stages after the flowering of indica and japonica rice in the past two years and the dynamic observation of macromolecules such as protein, nucleic acid and starch, During the primordial period, the embryo weight, the embryo volume and the number of cells increased exponentially. When the differentiation of organ primordia was completed about 11 ~ 13 days after flowering, the number of cells and the content of DNA and RNA tended to be stable. However, After a short period of stability but then increased again, embryo dry weight and protein content basically with the RNA content from the corresponding changes, and continued until a few days before maturation.