NDLI: Metal accumulation and toxicity measured by PAM--chlorophyll fluorescence in seven species of marine macroalgae.

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Metal accumulation and toxicity measured by PAM--chlorophyll fluorescence in seven species of marine macroalgae.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Baumann, Hans A. Morrison, Liam Stengel, Dagmar B.
Description	Country affiliation: Ireland Author Affiliation: Baumann HA ( Department of Botany, Martin Ryan Institute and Environmental Change Institute, National University of Ireland, Galway, Ireland. han.baumann@gmail.com)
Abstract	The effects of five metals, copper (Cu), chromium (Cr), Zinc (Zn), cadmium (Cd) and lead (Pb), on photosynthetic activity, measured as pulse amplitude modulation (PAM) chlorophyll fluorescence yield, was monitored in seven species of green, red and brown macroalgae over a 14d period. The 10micromoll(-1) of Cr and Zn reduced chlorophyll fluorescence of all species by day 4, and 10micromoll(-1) of Cu and Cd reduced the fluorescence of some species; however, fluorescence yields of all species were unaffected by 10micromoll(-1) of Pb. Metals were generally accumulated in the order of Cu>Pb>Zn>Cr>Cd. Ulva intestinalis accumulated the highest amounts of all metals, and Cladophora rupestris the lowest. A relationship between internal metal concentration and fluorescence was not always evident as in some cases fluorescence was reduced at low metal contents. In the case of Zn, fluorescence was lowest in plants which contained lowest concentrations after 14d-exposure, possibly because plants had died and Zn leached out of the algal cells. The relationship between internal metal concentration and fluorescence was algal species and metal-specific.
File Format	HTM / HTML
ISSN	01476513
Issue Number	4
Volume Number	72
e-ISSN	10902414
Journal	Ecotoxicology and Environmental Safety
Language	English
Publisher	Elsevier
Publisher Date	2009-05-01
Publisher Place	Netherlands
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Environmental Sciences Chlorophyll Metabolism Eukaryota Drug Effects Metals Toxicity Chlorophyta Fluorescence Analysis Phaeophyta Photosynthesis Rhodophyta Seawater Seaweed Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Pollution Health, Toxicology and Mutagenesis Public Health, Environmental and Occupational Health

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Metal accumulation and toxicity measured by PAM--chlorophyll fluorescence in seven species of marine macroalgae.