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- Title
Interactions between the tropical sea anemone A iptasia pallida and S erratia marcescens, an opportunistic pathogen of corals.
- Authors
Krediet, Cory J.; Meyer, Julie L.; Gimbrone, Nicholas; Yanong, Roy; Berzins, Ilze; Alagely, Ali; Castro, Herman; Ritchie, Kim B.; Paul, Valerie J.; Teplitski, Max
- Abstract
Coral reefs are under increasing stress caused by global and local environmental changes, which are thought to increase the susceptibility of corals to opportunistic pathogens. In the absence of an easily culturable model animal, the understanding of the mechanisms of disease progression in corals remains fairly limited. In the present study, we tested the susceptibility of the tropical sea anemone A iptasia pallida to an opportunistic coral pathogen ( S erratia marcescens). A . pallida was susceptible to S . marcescens PDL100 and responded to this opportunistic coral pathogen with darkening of the tissues and retraction of tentacles, followed by complete disintegration of polyp tissues. Histological observations revealed loss of zooxanthellae and structural changes in eosinophilic granular cells in response to pathogen infection. A screen of S . marcescens mutants identified a motility and tetrathionate reductase mutants as defective in virulence in the A . pallida infection model. In co-infections with the wild-type strain, the tetrathionate reductase mutant was less fit within the surface mucopolysaccharide layer of the host coral A cropora palmata.
- Subjects
GLOBAL environmental change; CORAL diseases; AIPTASIA pallida; SEA anemones; SERRATIA marcescens; PATHOGENIC microorganisms; ANIMAL models in research; PSYCHOLOGY
- Publication
Environmental Microbiology Reports, 2014, Vol 6, Issue 3, p287
- ISSN
1758-2229
- Publication type
Article
- DOI
10.1111/1758-2229.12151