INSPIRING FUTURES

Photosynthetic responses to Cu2+ exposure are independent of light acclimation and uncoupled from growth inhibition in Fucus serratus (Phaeophyceae).

Nielsen, Hanne Dalsgaard and Nielsen , Soren Laurentius (2005) Photosynthetic responses to Cu2+ exposure are independent of light acclimation and uncoupled from growth inhibition in Fucus serratus (Phaeophyceae). Marine Pollution Bulletin, 51 (8-12). pp. 715-721. ISSN 0025 326X

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Abstract/Description

We have studied the effect of light acclimation on photosynthetic responses and growth during Cu2+ exposure (0–0.84 μM) in the brown seaweed Fucus serratus. Measurements of chlorophyll fluorescence parameters showed that Cu2+ exposure amplified ETR, reduced the chlorophyll content at the cellular level and that there was no effect of light adaptation on the Cu2+ resistance of the algae. In contrast to the inhibitory effects of Cu2+ on chlorophyll fluorescence, O2 evolution and the total content of chlorophyll and carotenoid of the algae was unaffected by Cu2+. We conclude that photoinhibition and perhaps pigment degradation in the meristoderm was compensated for by cells deeper in the thallus with the result that the overall photosynthetic fitness of the algae was maintained. The pronounced inhibitory effects of Cu2+ on algae growth was not a consequence of photoinhibition and could be attributed to direct inhibitory effects on the growth process.

Item Type: Article
Print ISSN: 0025 326X
Electronic ISSN: 1879-3363
Uncontrolled Keywords: Copper; Tolerance; Ecotoxicology; Macroalgae; Photosynthesis; Xanthophyll;
University Divisions/Research Centres: Faculty of Health, Life & Social Sciences > School of Life Sciences
Dewey Decimal Subjects: 500 Science > 570 Life sciences; biology > 575 Specific parts of & systems in plants
500 Science > 540 Chemistry > 546 Inorganic chemistry
500 Science > 570 Life sciences; biology > 579 Microorganisms, fungi & algae
Library of Congress Subjects: Q Science > QD Chemistry
Q Science > QH Natural history > QH301 Biology
Item ID: 1736
Depositing User: RAE Import
Date Deposited: 18 Jul 2008 10:18
Last Modified: 25 Apr 2013 16:06
URI: http://researchrepository.napier.ac.uk/id/eprint/1736

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