The development of endosperm was of Nuclear type.The primary endosperm nucleus division was often posterior to zygote, and its division speed was also slower than that of embryo cells.
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- 胚乳发育属核型,初生胚乳核常常晚于合子分裂,胚乳核的分裂速度慢于胚体细胞的分裂速度。