| Symbiont-specific responses in foraminifera to the herbicide diuron. | |
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MedLine Citation:
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PMID: 21917276 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The effects of the photosystem II (PSII) herbicide diuron was assessed on thirteen tropical foraminifera hosting diatom, dinoflagellate, red or green algae endosymbionts. Inhibition of photosynthesis (reduced ΔF/F(m)(')) by diuron depended on both symbiont type and test ultrastructure, with greatest sensitivity observed for diatom- and chlorophyte-hosting species (24h IC(25) 2.5-4μgL(-1)). Inhibition kinetics was slow (24-48h until maximum inhibition) in comparison with corals, suggesting structural differences may influence herbicide uptake and transport. Although foraminifera were generally less sensitive to direct effects of diuron (inhibition ΔF/F(m)(')) than other marine phototrophs, damage to PSII (reduction F(v)/F(m)) occurred at concentrations lower than observed for other organisms (24h IC(25) 3-12μgL(-1)). Damage to PSII was highly light dependent and occurred at very low light intensities indicating limited photoprotective capacity. The high diversity, widespread occurrence and relative sensitivity make foraminifera good bioindicator organisms to evaluate phytotoxic stress on coral reefs. |
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Authors:
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Joost W van Dam; Andrew P Negri; Jochen F Mueller; Sven Uthicke |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-12 |
Journal Detail:
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Title: Marine pollution bulletin Volume: - ISSN: 1879-3363 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-9-15 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0260231 Medline TA: Mar Pollut Bull Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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The University of Queensland, Centre for Marine Studies, St. Lucia, QLD 4072, Australia; Australian Institute of Marine Science, PMB 3 Townsville MC, QLD 4810, Australia; The University of Queensland, National Research Centre for Environmental Toxicology, 39 Kessels Rd., Coopers Plains, QLD 4108, Australia. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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