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Updated: Feb 14, 2026

Positron Emission Tomography Using 64-Copper as a Tracer for the Study of Copper-Related Disorders
Published on: April 28, 2023
Combined effect of copper and hydrodynamic conditions on Myriophyllum alterniflorum biomarkers
Maha Krayem1, Véronique Deluchat2, Philippe Hourdin3
1University of Limoges, Faculty of Pharmacy, FR 3503, GRESE EA 4330 - Laboratory of Botany and Crytpogamy, 2 rue Dr. Marcland, 87025 Limoges, France; University of Limoges, Faculty of Sciences, FR3503, GRESE EA 4330, 123, avenue Albert Thomas, 87060 Limoges, France; Lebanese University, Platform for Research and Analysis in Environmental Sciences, Doctoral School of Sciences and Technologies, P.O. Box 5, Hadath, Beirut, Lebanon.
Abstract:
The aim of this study is to determine the combined effect of copper and hydrodynamic conditions on the response of certain biomarkers of an aquatic macrophyte, namely Myriophyllum alterniflorum. Watermilfoil biomarkers are monitored in a synthetic medium enriched or not with copper (100 μg.L-1) for 21 days in aquarium systems (150 L), under three hydrodynamic conditions: laminar, turbulent, and calm. The studied biomarkers are: respiratory and photosynthetic activities; concentrations of chlorophyll a, b and carotenoids; osmotic potential; hydrogen peroxide content; and growth. In addition, Cu contents in water and in Myriophyllum alterniflorum (roots and shoots) are investigated. The hydrodynamic conditions only affect watermilfoil morphology. Copper accumulates less in turbulent zones; moreover, it is more likely to accumulate in shoots than in roots, except within the calm zone. Cu leads to: i) a significant increase in H2O2 content, ii) a decrease in root growth, pigment content, osmotic potential, photosynthesis and respiration rates, and iii) an inhibition of shoot branching. Differential effects are also observed between younger and older parts, thus indicating the benefit of considering these two plant parts separately in water quality biomonitoring.
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