Growth response of the duckweed Lemna gibba L. to copper and nickel phytoaccumulation

Khellaf, Nabila; Zerdaoui, M.

doi:10.1007/s10646-010-0522-z

Cited by 94 publications

(75 citation statements)

References 28 publications

(35 reference statements)

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“…The concentrations inhibiting fresh weight increase over the 7 day test period were 0.1 and 0.5 mg/L for L. punctata and L. minor under monoculture, respectively. These results agree with those reported by Khellaf and Zerdaoui (2009) …”

Section: Discussionsupporting

confidence: 94%

The influence of duckweed species diversity on ecophysiological tolerance to copper exposure

et al. 2015

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Section: Discussionsupporting

confidence: 94%

The influence of duckweed species diversity on ecophysiological tolerance to copper exposure

et al. 2015

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“…Lemna gibba presented a decrease in size and an increase in incidence of chloritic plants (Figure 9). These symptoms corroborate the data obtained by Sing et al (2006), Otzurk et al (2010), Khellaf & Zerdaoui, (2010).…”

Section: Symptomatologysupporting

confidence: 91%

“…According to this criterion, L. gibba was shown to behave as an As hyperaccumulator in the present study, while A. caroliniana and S. minima did not show the same potentials. Lemna gibba was effective in tolerating also Cu and Ni at concentrations ≤0.3 and ≤0.5 mg L -1 , respectively; the LCI (lowest concentration that cause complete inhibition) was equal 0.5 and 1.0 mg L -1 , respectively, in the presence of these pollutants (Khellaf & Zerdaoui, 2010).…”

Section: Dry Mass Gainmentioning

confidence: 93%

Potential of macrophyte for removing arsenic from aqueous solution

et al. 2012

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-The potential of three aquatic macrophytes, Azoll caroliniana, Salvinia minima and Lemna gibba, was evaluated in this work aimed at selection of plants to be used in remediation of environments contaminated by arsenic (As). The experiments were carried out in a greenhouse during six days in pots containing Hoagland solution (¼ ionic strength) at As concentrations of 0.5; 2.5 and 5.0 mg L -1 . The three species showed greater As accumulation as the concentration of the metalloid in solution increased. However, a reduction was detected in fresh and dry mass gain when the plants were exposed to high As concentrations. The macrophytes showed differences in efficiency of removal of As in solution. A. caroliniana, S. minima and L. gibba accumulated, on average, 0.130; 0.200; and 1.397 mg mDM -1 , respectively, when exposed to 5.0 mg L -1 of As. The macrophytes absorbed a greater quantity of As in solution with low phosphate content. The greater As concentration in L. gibba tissues lowered the chlorophyll and carotenoid contents as shown by the high chlorosis incidence. Lemna gibba also exhibited a decrease in leaf size, with the total chlorophyll and carotenoid synthesis not being affected by As in A. caroliniana. This species exhibited purplish leaves with high concentration of anthocyanin, whose presence suggested association to phosphate deficiency. Marginal necrosis occurred on S. minima floating leaves, with the released daughter-plants not showing any visual symptoms during the treatment. The percentage of As removed from the solution decreased when the plants were exposed to high concentrations of the pollutant. Among the three species studied, only L. gibba could be considered an As hyper-accumulator. The use of this plant species for remediation of aquatic environments was shown to be limited and requires further investigation.Keywords: bio-remediation, phyto-remediation, aquatic plants, pollutant. RESUMO -O potencial de três macrófitas aquáticas -Azolla caroliniana, Salvinia mínima e Lemna gibba -foi avaliado neste estudo, com vistas à seleção de plantas para remediação de ambientes contaminados com arsênio (As). Os experimentos foram conduzidos em casa de vegetação durante seis dias, em vasos contendo solução Hoagland (¼ força iônica) e As nas concentrações de

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“…Conversely, the lowest BCF values were found for Cu, Cr, and Pb in the two investigated macrophytes (Thiébaut et al 2010). In a study of metal phytoaccumulation in Lemna gibba, Khellaf and Zerdaoui (2010) found that the BCF values ranged from 300 to 966 for Cu and from 33 to 100 for Ni. These results confirm that the bioaccumulation of metals by macrophytes is less productive than algae.…”

Section: Discussionmentioning

confidence: 85%

The accumulation of metal (Co, Cr, Cu, Mn and Zn) in freshwater Ulva (Chlorophyta) and its habitat

2013

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The possibility of using freshwater Ulva (Chlorophyta) as a bioaccumulator of metals (Co, Cr, Cu, Mn and Zn) in lake and river water was examined weekly in the summer of 2010 in three types of samples: the water, the sediment and the thalli of Ulva. Samples of freshwater Ulva were collected from two aqueous ecosystems lie 250 km away from the basin of the Baltic Sea and 53 km from each other. A flow lake located in the centre of the big city was the first water reservoir (ten sites) and second, the suburban river (six sites). The mean metal concentrations in the Ulva tissue from the river and the lake decreased in the following order:respectively. Moreover, a negative and statistically significant correlation between Mn concentrations in the Ulva thalli and the river water was observed. Additionally, numerous correlations were noted between the different concentrations of metals within the Ulva thalli, in the water and in the sediment. The great concentrations of Mn and Zn and the smallest of Co were found in thalli of Ulva, irrespective of the type of the ecosystem from which samples of algal thalli originated. Freshwater Ulva populations examined in this study were clearly characterized a dozen or so times by the higher Mn and Cr accumulation than taxa from that genera coming from sea ecosystems. The calculated bioconcentration factor confirm the high potential for freshwater Ulva to be a bioaccumulator of trace metals in freshwater ecosystems.

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Growth response of the duckweed Lemna gibba L. to copper and nickel phytoaccumulation

Cited by 94 publications

References 28 publications

The influence of duckweed species diversity on ecophysiological tolerance to copper exposure

The influence of duckweed species diversity on ecophysiological tolerance to copper exposure

Potential of macrophyte for removing arsenic from aqueous solution

The accumulation of metal (Co, Cr, Cu, Mn and Zn) in freshwater Ulva (Chlorophyta) and its habitat

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