The division ways of free nuclei in rice endosperm differed, including mitosis, amitosis, and the way that the daughter nuclei from mitosis went into amitosis without interphase.

• 水稻胚乳游离核的分裂具有多样性，既有有丝分裂，也有无丝分裂，还有有丝分裂后的子核不经间期随即进行无丝分裂等方式;