Uptake of Cadmium and Lead by a Rooted Aquatic Macrophyte (Elodea Canadensis)

Mayes, Roger A.; MacIntosh, Alan W.; Anderson, Virgil L.

doi:10.2307/1936940

Cited by 72 publications

(22 citation statements)

References 11 publications

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“…Evidence for such acropetal transport of metals varies with the metal and plant species studied. For instance, Welsh and Denny (1979) reported acropetal translocation of Cu, but not Pb, in two species of Potamogeton, although earlier studies (Welsh and Denny 1976;Mayes et al 1977) provided evidence of acropetal translocation of Pb in submerged aquatic plants. In the study by Mayes et al (1977), the authors considered that movement of Pb from contaminated sediment to the foliage of Elodea canadensis probably occurred through the water.…”

Section: Evidence For Transport Of Hg In E Septangularementioning

confidence: 99%

“…For instance, Welsh and Denny (1979) reported acropetal translocation of Cu, but not Pb, in two species of Potamogeton, although earlier studies (Welsh and Denny 1976;Mayes et al 1977) provided evidence of acropetal translocation of Pb in submerged aquatic plants. In the study by Mayes et al (1977), the authors considered that movement of Pb from contaminated sediment to the foliage of Elodea canadensis probably occurred through the water. Similarly, field observations of correlations between shoot and sediment Pb concentrations (Welsh and Denny 1976) probably reflected releases of Pb from the sediment affected by the turbulence and/or reduced redox potentials, and their subsequent uptake by the shoots (Welsh and Denny 1979).…”

Section: Evidence For Transport Of Hg In E Septangularementioning

confidence: 99%

“…The relative importance of these two routes for nutrient or for metal uptake, respectively, is not clear, although it is accepted that both pathways may operate in the same plant (Denny 1980). The route of metal uptake depends upon a number of factors including plant species, type of metal and its chemical form, and relative metal concentrations in the root and shoot environments (Mayes et al 1977;Denny 1980;Welsh and Denny 1980;Campbell et al 1985Campbell et al , 1988.…”

mentioning

confidence: 99%

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Mercury uptake from contaminated water and sediment by the rooted and submerged aquatic macrophyte Eriocaulon septangulare

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Welbourn

1994

Arch. Environ. Contam. Toxicol.

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Abstract. Laboratory experiments were designed to assess the relative importance of root vs shoot uptake of mercury by the submerged isoetid aquatic macrophyte Eriocaulon septangulare. Roots of mature plants that had been cultured for 31 days in sediments contaminated with non-toxic (approx. 1 I~g g 1) concentrations of inorganic mercury had significantly higher concentrations and significantly greater mercury content than plants cultured in the same way but in sediments without added mercury. Under the same experimental conditions, mercury content of leaves was related to the concentration of mercury in the water, being greater in the treatments which had higher total mercury in the water. The mercury in water in the experiments originated from the sediment. There was no evidence for transport of mercury from root to shoot within the plant, although there was possibly some transport in the opposite direction. The design of the experiment avoided making two compartments with a physical separation between the water (leaf)/sediment (root) interface, but with this design it was not possible to determine with certainty whether or not "downward" transport of mercury occurred within the plant. The results with E. septangulare and mercury support the idea that aquatic macrophytes can be useful monitors of metals in sediments.Rooted and submerged vascular plants can take up substances from their environment by one of two routes: either from the water column, through submerged shoots, or from interstitial water of the sediment, through the roots. The relative importance of these two routes for nutrient or for metal uptake, respectively, is not clear, although it is accepted that both pathways may operate in the same plant (Denny 1980 Campbell et al. 1985Campbell et al. , 1988.A number of investigators have suggested that aquatic macrophytes can serve as useful monitors of the bioavailability of sediment-bound toxic metals (Aulio 1980;Campbell et al. 1985Campbell et al. , 1988Lyngby and Brix 1987).Furthermore, the ability of rooted macrophytes to accumulate metals from the sediment compartment suggests that aquatic plants can play a role in metal cycling in lakes (Mclntosh et al. 1978;Larsen and Schierup 1981) by transferring metals to herbivores, by releasing metals during decomposition Schierup and Larsen 1981), or by secreting metals into the water column (Kraus et al. 1986). The cycling will be more effective if metal accumulated in the roots can be transported to the shoots.Many field studies have demonstrated metal accumulation in aquatic plants and the relative importance of root vs shoot accumulation seems quite variable. But because most field studies have not considered the root and shoot uptake separately, uptake routes and possible transport of metal within plants remain unclear.In order to address the relative importance of root vs shoot uptake in a rooted aquatic plant, we designed a laboratory experiment to assess the relative importance of two routes of Hg transfer between the sediment and Eriocaulon septan...

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Section: Evidence For Transport Of Hg In E Septangularementioning

confidence: 99%

Section: Evidence For Transport Of Hg In E Septangularementioning

confidence: 99%

mentioning

confidence: 99%

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Mercury uptake from contaminated water and sediment by the rooted and submerged aquatic macrophyte Eriocaulon septangulare

Coquery

Welbourn

1994

Arch. Environ. Contam. Toxicol.

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“…It was hypothesized that trace element levels in sediments and plants would be higher in sites at Belleville, close to potential contaminant sources, than in Hay Bay which was thought to be relatively isolated. Aquatic macrophytes are capable of bioaccumulating a number of trace elements (Mayers et al, 1977;Agami & Waisel, 1986) and therefore serve as potential biomonitors. Hydrophytes in the Moira River valley north of the Bay of Quinte have been found to contain high levels of As, Co, Cu, and Ni (Mudroch & Capobianco, 1979).…”

Section: Introductionmentioning

confidence: 99%

Metal contamination in sediments and biota of the Bay of Quinte, Lake Ontario, Canada

et al. 1989

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The Bay of Quinte receives drainage from several large river systems, including the Moira River which carried sediment from mines into the Bay from the 1880s to the 1960s. We are investigating possible metal contamination of submerged weed beds and marsh biota which may contribute to the low diversity and biomass of macrophyte beds and Typha marshes in the Bay. In 1987, sediment, macrophytes and snails were sampled in wetlands close to the Moira River and at Hay Bay (part of the Bay of Quinte presumably unaffected by mine effluents) located 20 km from the Moira. Some element concentrations in sediment and biota were determined by neutron activation analysis (NAA) including Al, As, Br, Zn. Other elements were analysed by acid dissolution and atomic absorption spectrophotometry (AAS) including Ag, As, Cu, Hg, Ni, Pb, and Zn. Levels of As in sediments and plants were higher close to the Moira River, whereas Cu and Ni showed the opposite pattern in sediments. The usefulness of species as bioassays differed: Stagnicola elodes Say accumulated significantly higher levels of Cu (35 vs 18 ppm) and V (1.1 vs 0.5 ppm) than Planorbella trivolvis Say collected from the same sites. The macrophyte, Myriophyllum spicatum L. acted as an accumulator of Pb (up to 9.6 ppm), whereas Pb in Vallisneria americana Michx. at the same sites was undetectable.

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“…Of particular interest is the role of macrophytes in the cycling of metals within aquatic ecosystems (McIntosh, 1975) . Not only do aquatic macrophytes take up metals from the sediments and water, and subsequently release these elements on aging and decomposition (Mayes et al, 1977 ;McIntosh et al, 1978), they also serve as food for higher trophic levels which can obtain a significant proportion of their body burdens of metal from this source (e .g . Newman & McIntosh, 1983) .…”

Section: Introductionmentioning

confidence: 99%

Cadmium, copper and lead in aquatic macrophytes in Shoal Lake (Manitoba-Ontario)

Pip

1990

Hydrobiologia

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Cadmium, copper and lead concentrations were surveyed in several species of submerged aquatic macrophytes in a Precambrian Shield Lake . Values were variable within each species and interspecific differences in metal concentration were not significant over the season as a whole . Cadmium concentration increased during the season in Potamogeton foliosus and Myriophyllum exalbescens, while copper and lead declined in P. foliosus . No identifiable seasonal trends were seen in P. zosteriformis and P . robbinsii . In P, foliosus, copper and lead concentrations increased with water depth . Few significant correlations were found between metal concentrations in the shoots and each of several water chemistry parameters, temperature, and shoot chlorophyll, soluble sugar and starch content . Roots yielded greater metal concentrations than shoots . 253

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Uptake of Cadmium and Lead by a Rooted Aquatic Macrophyte (Elodea Canadensis)

Cited by 72 publications

References 11 publications

Mercury uptake from contaminated water and sediment by the rooted and submerged aquatic macrophyte Eriocaulon septangulare

Mercury uptake from contaminated water and sediment by the rooted and submerged aquatic macrophyte Eriocaulon septangulare

Metal contamination in sediments and biota of the Bay of Quinte, Lake Ontario, Canada

Cadmium, copper and lead in aquatic macrophytes in Shoal Lake (Manitoba-Ontario)

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