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- W1997771303 abstract "An overview of, and information from, a number of publications dealing with the availability, uptake rates and accumulation of metals (e.g. Fe, Cu, Cr, Cd, Pb) and organic substances (e.g. polychlorinated biphenyls (PCB) and pesticides) by submersed and floating macrophytes are provided. Differences in metal enrichment are reported to be dependent mainly on the plant species, the seasonal growth rate changes, the tissue age, and metal or compound type. A brief review of the possible sites of absorption and accumulation of substances by the macrophytes is given and the role played by the roots and shoots is discussed. A higher concentration of metals in the plants usually, but not always, indicates a proportional increase in element levels in the water and/or sediments. Consequently, the implications for the use of macrophytes as phytogeochemical indicators for metals and other toxic materials in water bodies are also evaluated. Competition between elements and factors, indirectly influencing metal uptake such as, for example, light conditions and eutrophication, seem to limit in some cases the utility of using macrophytes as bio-indicators. Further, the effects of metals, particularly Cu and Cr, and a few other organic compounds on growth and photosynthesis of some species are described. In considering all these aspects, the importance of several environmental factors (e.g. pH, water hardness, nutrient concentration) in influencing the macrophyte-toxic compound cycle occurring in aquatic system has been emphasized. It has been noted how contradictory results often emerge because of the large differences existing both in sampling time and in the methods used by different working groups. As a general rule, it seems extremely difficult to extrapolate field results from one species to another." @default.
- W1997771303 created "2016-06-24" @default.
- W1997771303 creator A5082683834 @default.
- W1997771303 date "1991-01-01" @default.
- W1997771303 modified "2023-10-03" @default.
- W1997771303 title "The role of heavy metals and toxic amterials in the physiological ecology of submersed macrophytes" @default.
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- W1997771303 doi "https://doi.org/10.1016/0304-3770(91)90040-c" @default.
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