title: Pentagonal arrays of ribosomes in fertilized eggs of Pteridium aquilinum (L.) Kuhn.
mesh_terms: D002454:Cell Differentiation; D004721:Endoplasmic Reticulum; D005306:Fertilization; D005854:Germ Cells / Q000166:cytology*; D059828:Plant Cells; D012270:Ribosomes