Relationship of Vibrio Species Infection and Elevated Temperatures to Yellow Blotch/Band Disease in Caribbean Corals
| Autor: | Raymond L. Hayes, Sara C. Polson, James M. Cervino, Robert J. Martinez, Thomas J. Goreau, Garriet W. Smith, Shawn W. Polson |
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| Jazyk: | angličtina |
| Rok vydání: | 2004 |
| Předmět: |
Chlorophyll
Coral Zoology Applied Microbiology and Biotechnology DNA Ribosomal Pyrenoid Microbial Ecology Symbiosis Algae Anthozoa RNA Ribosomal 16S Botany Animals natural sciences Vibrio Ecology biology fungi technology industry and agriculture Temperature Eukaryota Sequence Analysis DNA biochemical phenomena metabolism and nutrition biology.organism_classification Caribbean Region Zooxanthellae Yellow-band disease geographic locations Food Science Biotechnology |
| Popis: | The bacterial and temperature factors leading to yellow blotch/band disease (YBD), which affects the major reef-building Caribbean corals Montastrea spp., have been investigated. Groups of bacteria isolated from affected corals and inoculated onto healthy corals caused disease signs similar to those of YBD. The 16S rRNA genes from these bacteria were sequenced and found to correspond to four Vibrio spp. Elevating the water temperature notably increased the rate of spread of YBD on inoculated corals and induced greater coral mortality. YBD-infected corals held at elevated water temperatures had 50% lower zooxanthella densities, 80% lower division rates, and a 75% decrease in chlorophyll a and c 2 pigments compared with controls. Histological sections indicated that the algal pyrenoid was fragmented into separate segments, along with a reconfiguration and swelling of the zooxanthellae, as well as vacuolization. YBD does not appear to produce the same physiological response formerly observed in corals undergoing temperature-related bleaching. Evidence indicates that YBD affects primarily the symbiotic algae rather than coral tissue. |
| Databáze: | OpenAIRE |
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