Widespread association of a Rickettsiales-like bacterium with reef-building corals
| Autor: | Veronica Casas, Mya Breitbart, Yanan Yu, Forest Rohwer, Linda Wegley, David I. Kline |
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| Rok vydání: | 2004 |
| Předmět: |
DNA
Bacterial Coral DNA Ribosomal Ribotyping Microbiology RNA Ribosomal 16S medicine Animals Acropora Pathogen Reef Phylogeny Ecology Evolution Behavior and Systematics Alphaproteobacteria geography geography.geographical_feature_category biology Ecology Outbreak Genes rRNA Sequence Analysis DNA Anthozoa 16S ribosomal RNA biology.organism_classification medicine.disease RNA Bacterial White band disease Water Microbiology Rickettsiales geographic locations |
| Zdroj: | Environmental Microbiology. 6:1137-1148 |
| ISSN: | 1462-2920 1462-2912 |
| DOI: | 10.1111/j.1462-2920.2004.00647.x |
| Popis: | White band disease type I (WBD I) has been a major cause of the dramatic decline of Acroporid coral populations throughout the Caribbean during the last two decades, yet the aetiological agent of this disease is unknown. In this study, the bacterial communities associated with both healthy and diseased Acropora species were compared by 16S rDNA analyses. The bacterial communities of both healthy and diseased Acropora spp. were dominated by a single ribotype with 90% identity to a bacterium in the order Rickettsiales. Screening by nested PCR specific to the coral-associated Rickettsiales 1 (CAR1) bacterium showed that this microbe was widespread in both healthy and diseased A. cervicornis and A. palmata corals from 'healthy' (i.e. low WBD I incidence) and 'stressed' reefs (i.e. high WBD I incidence). These results indicate that there were no dramatic changes in the composition of the microbial community associated with WBD I. CAR1 was also associated with non-Acroporid corals of the Caribbean, as well as with two Acroporid corals native to the Pacific. CAR1 was not present in the water column. This bacterium was also absent from preserved Caribbean Acroporid samples collected between 1937 and 1980 before the outbreak of WBD I. These results suggest CAR1 is a relatively new bacterial associate of Acroporids and that a non-bacterial pathogen might be the cause of WBD I. |
| Databáze: | OpenAIRE |
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