title: The use of light and electron microscopy in the study of experimentally altered spores and pollen grains.
mesh_terms: D005580:Fossils; D049690:History, Ancient; D006358:Hot Temperature; D008854:Microscopy, Electron; D010944:Plants / Q000648:ultrastructure*; D011058:Pollen / Q000648:ultrastructure*; D011312:Pressure; D013170:Spores / Q000648:ultrastructure