首页 | 本学科首页   官方微博 | 高级检索  
     检索      


The Black Band Disease of Atlantic Reef Corals.
Authors:Klaus  Rutzler  Deborah L  Santavy Arnfried  Antonius
Institution:Department of Invertebrate Zoology, National Museum of Natural History, Smithsonian Institution;Washington, D.C. 20560, U.S.A.
Abstract:Abstract. The cyanophyte (Cyanobaclerium) that causes black band disease of Atlantic reef corals is described under the name Phormidium corallyticum , new species (family Oscillatoriaceae) , and its generic placement is discussed from the standpoint of the GEITLERian (classical) and D rouet systems. Distinguishing characters include densely interwoven filaments that form a blackish mat and trichomes without significant cell wall constrictions, almost isodiametric cells (4.2 μm mean width, 4.0μm mean length) tapering end cells, and thin (0.1 μm or less) mucilaginous wall coating. Transmission electron microscopy shows typical cyanophyte cell walls, sheath, nucleoplasm, and cytoplasmic inclusions, but an unusual thylakoid of straight, and, as seen in cell cross section, radiating lamellae. The dark coloration is due to a high concentration of phycocyanin and some phycoerythrin. The species is similar to Oscillatoria (= Phormidium) submembranacea , which differs in several morphological features and does not infect coral tissue. It is concluded that Phormidium should be used for this and related species that have external mucilage but not the distinct sheath found in Lyngbya.
Keywords:Coral pathogen  Cyanophyta  Cyanobacteria  Scleraclinia  Phormidium corallyticum  morphology  finestructure  pigments  systematics  new species
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号