part_of part of part of develops_from develops from plant sperm cell generative cell pollen sperm cell 花粉精子細胞 (Japanese, exact) plant_anatomy PO_GIT:141 Pollen sperm cells are structurally simple, usually non-motile cells that may contain a normal complement of cellular organelles, including heritable cytoplasmic organelles such as mitochondria and, in some plants, plastids, but lack a cell wall. In seed plants, pollen sperm cells are usually two in number. In angiosperms, during double fertilization, one fuses with the plant egg cell (PO:0020094) to produce a plant zygote (PO:0000423) while another fuses with the two polar nuclei of the embryo sac central cell (PO:0020090) to give rise to endosperm (PO:0009089). In angiosperms, the pollen sperm cell arises from the generative cell (PO:0020097). In gymnosperms, the pollen sperm cell arises from the body cell (PO:0025525). 2010-11-15T08:05:46Z A plant sperm cell (PO:0000084) that is part of the pollen (PO:0025281). c&#233lula esperm&#225tica pol&#237nica (Spanish, exact) PO:0025121 rwalls pollen body cell