Document Detail

Towards a more ecologically relevant assessment of the impact of heavy metals on the photosynthesis of the seagrass, Zostera capricorni.
MedLine Citation:
PMID:  12398373     Owner:  NLM     Status:  MEDLINE    
This in situ study used photosynthetic activity (measured as chlorophyll a fluorescence) and photosynthetic pigment concentrations to assess the effect of copper, cadmium, lead and zinc on the seagrass Zostera capricorni. Custom-made portable in situ exposure (PIE) chambers were developed so seagrasses could be dosed within the meadow. Z capricorni was exposed to 0.1 and I mg l(-1) of metal solutions for 10 h. During this time and for the subsequent four-day recovery period, the effective quantum yield of photosystem II (PS II) (deltaF/Fm') was measured. While the results were variable, copper and zinc exposed samples had a depressed deltaF/Fm' during the exposure period. Samples exposed to zinc recovered to pre-exposure levels but those exposed to copper did not. Cadmium and lead did not impact on the chlorophyll a fluorescence and the chlorophyll pigment data supported these findings. This study presents an innovative new application of chlorophyll a fluorescence stress assessment.
Catriona M O Macinnis-Ng; Peter J Ralph
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Marine pollution bulletin     Volume:  45     ISSN:  0025-326X     ISO Abbreviation:  Mar. Pollut. Bull.     Publication Date:  2002  
Date Detail:
Created Date:  2002-10-25     Completed Date:  2003-02-12     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0260231     Medline TA:  Mar Pollut Bull     Country:  England    
Other Details:
Languages:  eng     Pagination:  100-6     Citation Subset:  IM    
Multiscale Ecosystem Research Group, University of Technology, Sydney, NSW, Australia.
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MeSH Terms
Biological Assay
Chlorophyll / analysis
Metals, Heavy / adverse effects*
Photosynthesis / drug effects*
Risk Assessment
Water Pollutants / adverse effects*
Zosteraceae / drug effects*,  physiology*
Reg. No./Substance:
0/Metals, Heavy; 0/Water Pollutants; 1406-65-1/Chlorophyll; 479-61-8/chlorophyll a

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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