title: Spermiogenesis in the fern Marsilea microtubules, nuclear shaping, and cytomorphogenesis.
mesh_terms: D002454:Cell Differentiation; D002467:Cell Nucleus / Q000648:ultrastructure; D002843:Chromatin / Q000648:ultrastructure; D003593:Cytoplasm / Q000648:ultrastructure; D005407:Flagella / Q000648:ultrastructure; D008297:Male; D008870:Microtubules / Q000648:ultrastructure; D008928:Mitochondria / Q000648:ultrastructure; D018521:Plant Physiological Phenomena; D013087:Spermatids / Q000648:ultrastructure; D013091:Spermatogenesis
chemical_list: D002843:Chromatin