【摘 要】
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The maize kel contains two filial products of the double fertilization, wherein one of the two sperm cells (1C, the DNA content of a haploid genome) from a poll
【机 构】
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National Key Laboratory of Plant Molecular Genetics, CAS Center for Excellence in Molecular Plant Sc
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The maize kel contains two filial products of the double fertilization, wherein one of the two sperm cells (1C, the DNA content of a haploid genome) from a pollen grain fertilizes the egg (1C) to form the zy-gote and the other sperm fuses with the central cell (2C) to produce the primary endosperm. The zygote (2C) undergoes a series of asymmetric and symmetric divisions and axial patting, eventually differ-entiating into the embryo containing the shoot/root apexes, the mesocotyl, and the scutellum, whereas the primary endosperm (3C) requires multiple devel-opmental processes, including coenocyte formation, cellularization, cell mitotic division and differentiation, endoduplication and cell expansion, and maturation followed by programmed cell death.
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