Response of two species of indo-pacific corals, porites cylindrica and stylophora pistillata, to short-term thermal stress: The host does matter in determining the tolerance of corals to bleaching

Fitt, W.K., Gates, R.D., Hoegh-Guldberg, O., Bythell, J.C., Jatkar, A., Grottoli, A.G., Gomez, M., Fisher, P., Lajuenesse, T.C., Pantos, O., Iglesias-Prieto, R., Franklin, D.J., Rodrigues, L.J., Torregiani, J.M., van Woesik, R. and Lesser, M.P. (2009) Response of two species of indo-pacific corals, porites cylindrica and stylophora pistillata, to short-term thermal stress: The host does matter in determining the tolerance of corals to bleaching. Journal of Experimental Marine Biology And Ecology, 373 2: 102-110. doi:10.1016/j.jembe.2009.03.011


Author Fitt, W.K.
Gates, R.D.
Hoegh-Guldberg, O.
Bythell, J.C.
Jatkar, A.
Grottoli, A.G.
Gomez, M.
Fisher, P.
Lajuenesse, T.C.
Pantos, O.
Iglesias-Prieto, R.
Franklin, D.J.
Rodrigues, L.J.
Torregiani, J.M.
van Woesik, R.
Lesser, M.P.
Title Response of two species of indo-pacific corals, porites cylindrica and stylophora pistillata, to short-term thermal stress: The host does matter in determining the tolerance of corals to bleaching
Journal name Journal of Experimental Marine Biology And Ecology   Check publisher's open access policy
ISSN 0022-0981
Publication date 2009-05
Year available 2009
Sub-type Article (original research)
DOI 10.1016/j.jembe.2009.03.011
Volume 373
Issue 2
Start page 102
End page 110
Total pages 9
Editor S. E Shumway
R. Hughes
S. Thrush
Place of publication Netherlands
Publisher Elseiver
Collection year 2010
Language eng
Subject 9603 Climate and Climate Change
050101 Ecological Impacts of Climate Change
0603 Evolutionary Biology
Formatted abstract
The role of both host and dinoflagellate symbionts was investigated in the response of reef-building corals to thermal stress in the light. Replicate coral nubbins of Stylophora pistillata and Porites cylindrica from the GBR were exposed to either 28 degrees C (control) or 32 degrees C for 5 days before being returned to an ambient reef temperature (28 degrees C). S. pistillata was found to contain either Symbiodinium genotype C1 or C8a, while P cylindrica had type C15 based on ITS genotyping. Analysis of the quantum yield of photosystem (PS) II fluorescence of the symbionts in P. cylindrica showed that light-induced excitation pressure on the C15 Symbiodinium was significantly less, and the steady state quantum yield of PSII fluorescence at noon (Delta F/Fm') greater, than that measured in C1/C8a Symbiodinium sp. from S. pistillata. Immunoblots of the PS II D1 protein were significantly lower in Symbiodinium from S. pistillata compared to those in P. cylindrica after exposure to thermal stress. The biochemical markers, heat-stress protein (HSP) 70 and superoxide dismutase (SOD), were significantly greater in P. cylindrica before the experiments and both species of coral increased their biosynthesis of HSP 70 and SOD when exposed to thermal stress. Concentrations of MAAs, glycerol, and lipids were not significantly affected by thermal stress in these experiments, but DNA damage was greater in heat-stressed S. pistillata compared to R cylindrica. There was minimal coral mucus, which accounts for up to half of the total energy budget of a coral and provides the first layer of defense for invading microbes, produced by S. pistillata after heat stress compared to P. cylindrica. It is concluded that P. cylindrica contains a heat resistant C15 Symbiodinium and critical host proteins are present at higher concentrations than observed for S. pistillata, the combination of which provides greater protection from bleaching conditions of high temperature in the light. (C) 2009 Elsevier B.V. All rights reserved.
Keyword Corals
Great-Barrier-Reef
Montastraea-Faveolata
Algal Symbionts
Photosystem-II;
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
Centre for Marine Studies Publications
 
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Created: Thu, 03 Sep 2009, 07:59:43 EST by Mr Andrew Martlew on behalf of Centre for Marine Studies