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Host Coenzyme Q Redox State Is an Early Biomarker of Thermal Stress in the Coral Acropora millepora

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dc.contributor Australian Institute Of Marine Science
dc.contributor Dept Mol & Cell Biol
dc.contributor Comparat Genom Ctr
dc.contributor James Cook Univ
dc.contributor James Cook University
dc.contributor Aims Jcu
dc.contributor Univ Melbourne
dc.contributor Coll Marine & Environm Sci
dc.contributor Australian Inst Marine Sci
dc.contributor Sch Biosci
dc.contributor Arc Ctr Excellence Coral Reef Studies
dc.contributor University Of Melbourne
dc.contributor Metabol Australia
dc.contributor.author VAN OPPEN, MADELEINE J. H.
dc.contributor.author LUTZ, ADRIAN
dc.contributor.author RAINA, JEAN-BAPTISTE
dc.contributor.author MOTTI, CHERIE A.
dc.contributor.author MILLER, DAVID J.
dc.date.accessioned 2015-10-06T05:37:57Z
dc.date.accessioned 2015-10-06T05:37:57Z
dc.date.accessioned 2017-03-21T01:02:15Z
dc.date.accessioned 2019-07-08T02:10:26Z
dc.date.available 2017-03-21T01:02:15Z
dc.date.available 2015-10-06T05:37:57Z
dc.date.available 2017-03-21T01:02:15Z
dc.date.available 2019-07-08T02:10:26Z
dc.date.issued 2015-10-01
dc.identifier.citation Lutz A, Raina J-B, Motti CA, Miller DJ, van Oppen MJH (2015) Host coenzyme Q redox state is an early biomarker of thermal stress in the coral Acropora millepora. PLoS ONE 10(10): e0139290 en_US
dc.identifier.issn 1932-6203
dc.identifier.uri http://epubs.aims.gov.au/11068/11360
dc.description.abstract Bleaching episodes caused by increasing seawater temperatures may induce mass coral mortality and are regarded as one of the biggest threats to coral reef ecosystems worldwide. The current consensus is that this phenomenon results from enhanced production of harmful reactive oxygen species (ROS) that disrupt the symbiosis between corals and their endosymbiotic dinoflagellates, Symbiodinium. Here, the responses of two important antioxidant defence components, the host coenzyme Q (CoQ) and symbiont plastoquinone (PQ) pools, are investigated for the first time in colonies of the scleractinian coral, Acropora millepora, during experimentally-induced bleaching under ecologically relevant conditions. Liquid chromatography-mass spectrometry (LC-MS) was used to quantify the states of these two pools, together with physiological parameters assessing the general state of the symbiosis (including photosystem II photochemical efficiency, chlorophyll concentration and Symbiodinium cell densities). The results show that the responses of the two antioxidant systems occur on different timescales: (i) the redox state of the Symbiodinium PQ pool remained stable until twelve days into the experiment, after which there was an abrupt oxidative shift; (ii) by contrast, an oxidative shift of approximately 10% had occurred in the host CoQ pool after 6 days of thermal stress, prior to significant changes in any other physiological parameter measured. Host CoQ pool oxidation is thus an early biomarker of thermal stress in corals, and this antioxidant pool is likely to play a key role in quenching thermally-induced ROS in the coral-algal symbiosis. This study adds to a growing body of work that indicates host cellular responses may precede the bleaching process and symbiont dysfunction.
dc.description.sponsorship This work has been funded by the Australian Institute of Marine Science (www.aims.gov.au) and AIMS@JCU (aims.jcu.edu.au), a collaborative scheme between the Australian Institute for Marine Science and James Cook University. A.L. and J-B. R. were supported by AIMS@JCU PhD Scholarships. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
dc.description.sponsorship This work has been funded by the Australian Institute of Marine Science (www.aims.gov.au) and AIMS@JCU (aims.jcu.edu.au), a collaborative scheme between the Australian Institute for Marine Science and James Cook University. AL and J-B R were supported by AIMS@JCU PhD Scholarships. en_US
dc.description.uri http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0139290 en_US
dc.language English
dc.language.iso en en_US
dc.publisher PLOS (OPEN) en_US
dc.relation.ispartof Null
dc.rights Attribution 3.0 Australia *
dc.rights.uri http://creativecommons.org/licenses/by/3.0/au/ *
dc.subject Alpha-tocopherol
dc.subject Elevated-temperature
dc.subject Science & Technology - Other Topics
dc.subject Apoptotic Events
dc.subject Multidisciplinary Sciences
dc.subject Endosymbiotic Algae
dc.subject Ultraviolet-radiation
dc.subject Reef Corals
dc.subject Antioxidant Activity
dc.subject Membrane-lipids
dc.subject Oxidative Stress
dc.subject Symbiotic Sea-anemone
dc.title Host Coenzyme Q Redox State Is an Early Biomarker of Thermal Stress in the Coral Acropora millepora
dc.type journal article en_US
dc.identifier.doi 10.1371/journal.pone.0139290
dc.identifier.wos WOS:000362177100046


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