Spatial heterogeneity in active chlorophyll fluorescence and PSII activity of coral tissues

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dc.contributor.author Ralph, PJ
dc.contributor.author Gademann, R
dc.contributor.author Larkum, AWD
dc.contributor.author Kühl, M
dc.date.accessioned 2009-12-21T02:30:09Z
dc.date.issued 2002
dc.identifier.citation Marine Biology, 2002, 141 (4), pp. 639 - 646
dc.identifier.issn 0025-3162
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/3771
dc.description.abstract Chlorophyll-a fluorescence was measured in six species of coral, using pulse-amplitude-modulated fluorometers employing fibre-optic probes with diameters of 8 mm, 1 mm and 140 μm. The 8-mm probe integrated responses over a large area, giving more weight to coenosarc than polyp tissue for Acropora nobilis. With 1-mm and 140-μm fibre-optic probes, the photosynthetic responses of zooxanthellae in the coenosarc and the polyp tissue of Acropora nobilis were distinguished. The polyp tissue exhibited a lower maximum in relative electron transport rate than did the coenosarc tissue, and was subject to down-regulation at higher irradiances. Coenosarc and polyp tissue (both containing zooxanthellae) showed a wide range of responses in the other corals. Down-regulation of photosynthesis in a single polyp of Pocillopora damicornis was followed after exposure to moderate irradiance, with recovery occurring over a further 4 h of shade conditions. All the corals (Acropora millepora, A. nobilis, Cyphastrea serailia, Montipora tuberculosa, Pocillopora damicornis and Porites cylindrica) showed evidence of strong down-regulation of photosynthesis under high irradiance, and little evidence of photoinhibitory damage to photosystem II.
dc.language eng
dc.relation.isbasedon 10.1007/s00227-002-0866-x
dc.title Spatial heterogeneity in active chlorophyll fluorescence and PSII activity of coral tissues
dc.type Journal Article
dc.description.version Published
dc.parent Marine Biology
dc.journal.volume 4
dc.journal.volume 141
dc.journal.number N/A en_US
dc.publocation New York en_US
dc.identifier.startpage 639 en_US
dc.identifier.endpage 646 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 050101 Ecological Impacts of Climate Change
dc.for 060705 Plant Physiology
dc.personcode 890085
dc.personcode 111269
dc.personcode 107129
dc.percentage 50 en_US
dc.classification.name Plant Physiology en_US
dc.classification.type FOR-08 en_US
dc.description.keywords Science & Technology
dc.description.keywords Life Sciences & Biomedicine
dc.description.keywords Biochemistry & Molecular Biology
dc.description.keywords Endocrinology & Metabolism
dc.description.keywords BIOCHEMISTRY & MOLECULAR BIOLOGY
dc.description.keywords ENDOCRINOLOGY & METABOLISM
dc.description.keywords flow cytometry
dc.description.keywords reactive oxygen species
dc.description.keywords NADPH oxidase
dc.description.keywords T lymphocytes
dc.description.keywords free radicals
dc.description.keywords NF-KAPPA-B
dc.description.keywords FLUORESCENT DYE 2'-7'-DICHLOROFLUORESCEIN
dc.description.keywords PHORBOL-MYRISTATE ACETATE
dc.description.keywords FREE-RADICAL FORMATION
dc.description.keywords STRESS MEASUREMENTS
dc.description.keywords HYDROGEN-PEROXIDE
dc.description.keywords MONONUCLEAR-CELLS
dc.description.keywords ARACHIDONIC-ACID
dc.description.keywords PROBE 2',7'-DICHLOROFLUORESCIN
dc.description.keywords HORSERADISH-PEROXIDASE
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - C3


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