Zooxanthellae Harvested by Ciliates Associated with Brown Band Syndrome of Corals Remain Photosynthetically Competent

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dc.contributor.author Ulstrup, Karin Elizabeth en_US
dc.contributor.author Kuhl, Michael en_US
dc.contributor.author Bourne, David en_US
dc.contributor.editor en_US
dc.date.accessioned 2010-05-28T09:44:20Z
dc.date.available 2010-05-28T09:44:20Z
dc.date.issued 2007 en_US
dc.identifier 2009004084 en_US
dc.identifier.citation Ulstrup Karin Elizabeth, Kuhl Michael, and Bourne David 2007, 'Zooxanthellae Harvested by Ciliates Associated with Brown Band Syndrome of Corals Remain Photosynthetically Competent', Applied and Environmental Microbiology, Amer Soc Microbiology, Washington DC, USA en_US
dc.identifier.issn 0099-2240 en_US
dc.identifier.other C3 en_US
dc.identifier.uri http://hdl.handle.net/10453/8599
dc.description.abstract Brown band syndrome is a new coral affliction characterized by a local accumulation of yet-unidentified ciliates migrating as a band along the branches of coral colonies. In the current study, morphologically intact zooxanthellae (= Symbiodinium) were observed in great numbers inside the ciliates (>50 dinoflagellates per ciliate). Microscale oxygen measurements and variable chlorophyll a fluorescence analysis along with microscopic observations demonstrated that zooxanthellae within the ciliates are photosynthetically competent and do not become compromised during the progression of the brown band zone. Zooxanthellae showed similar trends in light acclimation in a comparison of rapid light curve and steady-state light curve measures of variable chlorophyll a fluorescence. Extended light exposure of steady-state light curves resulted in higher quantum yields of photosystem II. The brown band tissue exhibited higher photosynthetically active radiation absorptivity, indicating more efficient light absorption due to a higher density of zooxanthellae in the ciliate-dominated zone. This caused relatively higher gross photosynthesis rates in the zone with zooxanthella-containing ciliates compared to healthy coral tissue. The observation of photosynthetically active intracellular zooxanthellae in the ciliates suggests that the latter can benefit from photosynthates produced by ingested zooxanthellae and from photosynthetic oxygen production that alleviates diffusion limitation of oxic respiration in the densely populated brown band tissue. en_US
dc.language en_US
dc.publisher Amer Soc Microbiology en_US
dc.relation.isbasedon http://dx.doi.org/10.1128/AEM.02292-06 en_US
dc.title Zooxanthellae Harvested by Ciliates Associated with Brown Band Syndrome of Corals Remain Photosynthetically Competent en_US
dc.parent Applied and Environmental Microbiology en_US
dc.journal.volume 73 en_US
dc.journal.number 11 en_US
dc.publocation Washington DC, USA en_US
dc.identifier.startpage 1968 en_US
dc.identifier.endpage 1975 en_US
dc.cauo.name SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 060500 en_US
dc.personcode 10018923 en_US
dc.personcode 107129 en_US
dc.personcode 0000061256 en_US
dc.percentage 100 en_US
dc.classification.name Microbiology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords NA en_US


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