Biomass production of <i>Eichhornia crassipes</i> and <i>Paspalum repens</i> in two contrasting environment of the Orinoco River delta (Venezuela)

Colonnello, Giuseppe

doi:10.1080/03680770.1995.11901054

Cited by 1 publication

(1 citation statement)

References 2 publications

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“…Since Hg has no physiological function in aquatic plants, its accumulation in the roots does not necessarily imply translocation to the aerial tissues [64]. Additionally, in floodplains, P. repens mats are subjected to rapid variations in water level between hydrological periods so that stem growth occurs continuously to allow for leaf fluctuation [65]. Thus, the continuous growth may imply the process of Hg biodilution, characterized by limiting the accumulation of chemical elements due to biomass growth [66,67].…”

Section: Bioconcentration Translocation and The Influence Of Environm...mentioning

confidence: 99%

Mercury Bioconcentration and Translocation in Rooted Macrophytes (Paspalum repens Berg.) from Floodplain Lakes in the Araguaia River Watershed, Brazilian Savanna

Monteiro,

Vieira,

Bernardi

et al. 2024

Water

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Macrophytes are fundamental photosynthetic organisms for functioning freshwater ecosystems, identified as potential bioindicators of mercury (Hg) in the environment. We quantified the concentrations of total Hg (THg) in water and macrophytes (Paspalum repens Berg.) from 17 lakes on the Araguaia River floodplain, aiming to compare the bioconcentration factor (BCF) in the aerial tissues and roots; evaluate the translocation factor (TF) between plant tissues; and assess the influence of environmental factors and land use on THg concentrations in water and macrophytes. The BCF was significantly higher in roots (1.29 ± 0.32) than in aerial tissues (0.41 ± 0.34), with low TF between plant tissues (0.14 ± 0.06). The highest concentrations of THg in water were determined in lakes with higher land use intensity and a pH close to neutral, indicating the transport of particulate-bound Hg and the immobilization in the water column. In contrast, wetlands were priority areas for the bioconcentration of THg in macrophytes, associated with sulfate, dissolved oxygen, and oxidation–reduction potential in the water. Thus, although P. repens is not a suitable bioindicator of Hg mobilization by anthropogenic land use in our study area, our results suggest the potential of macrophytes as bioindicators of sites that are favorable to Hg methylation.

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Section: Bioconcentration Translocation and The Influence Of Environm...mentioning

confidence: 99%

Mercury Bioconcentration and Translocation in Rooted Macrophytes (Paspalum repens Berg.) from Floodplain Lakes in the Araguaia River Watershed, Brazilian Savanna

Monteiro,

Vieira,

Bernardi

et al. 2024

Water

View full text Add to dashboard Cite

show abstract

Biomass production of Eichhornia crassipes and Paspalum repens in two contrasting environment of the Orinoco River delta (Venezuela)

Cited by 1 publication

References 2 publications

Mercury Bioconcentration and Translocation in Rooted Macrophytes (Paspalum repens Berg.) from Floodplain Lakes in the Araguaia River Watershed, Brazilian Savanna

Mercury Bioconcentration and Translocation in Rooted Macrophytes (Paspalum repens Berg.) from Floodplain Lakes in the Araguaia River Watershed, Brazilian Savanna

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