title: Colonization of Porphyra perforata thallus discs by Pythium marinum, a marine facultative parasite.
mesh_terms: D004463:Ecology; D056890:Eukaryota / Q000254:growth & development; D005658:Fungi / Q000254:growth & development*; D011775:Pythium / Q000254:growth & development*; D012623:Seawater; D014871:Water Microbiology