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通过ＧＭＡ切片和超薄切片技术对多胚水稻品系ＡＰⅣ和单胚品种ＩＲ３６珠心组织的行为进行研究表明，两份材料的珠心组织从大孢子母细胞形成开始到受精后数天，处于边生长边退化状态，在合子分裂前，以生长为主，此期间在珠心组织内可观察到许多具分裂相的细胞，这些细胞膨大但细胞质很少，与具备分生能力的细胞完全不同，无法进一步分裂；合子分裂以后珠心组织退化加速，到受精后４～５ｄ，珠心组织除了其表皮细胞外，其他几乎都解体了。ＡＰⅣ珠心组织出现低频率异常生长的现象，但未观察到在自然条件下由珠心细胞发育形成的不定胚。
Studies on the behavior of the polyembryonic rice line APⅣ and the single embryo variety IR36 nucellus by GMA sectioning and ultrathin sectioning showed that the livers of the two materials started from the formation of megaspore mother cells to days after fertilization, Growing side of the degradation state, before the zygotic division, mainly to growth, during this period can be observed within the bead heart cells with split phase, these cells are expanded but the cytoplasm is very small, with cells with meristematic ability is completely different, Can not be further split; zygotic degeneration accelerated after the zygotic division, to 4 ~ 5d after fertilization, except for the pearl heart of the epidermal cells, the other almost all disintegrated. APⅣ bead heart tissue showed the phenomenon of abnormal low frequency growth, but no adventitious embryos were observed under the natural conditions.