Application of Lemna species in ecotoxicological studies of heavy metals and organic biocides

Lakatos, Gyula; Mészáros, Ilona; Bohátka, S.; Szabó, Sándor; Makádi, Mariann; Csatlós, M.; Langer, G.A.

doi:10.1016/s0048-9697(05)80081-6

Cited by 24 publications

(10 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Axenic stock cultures of L. gibba L. and L. minor L. were maintained in 0.5 strength Hutner's medium (pH 6.3) (Lakatos et al 1993) under controlled conditions (PFD = 50 ± 5 μmol m -2 s -1 continuous white illumination, 22 ± 2°C).…”

Section: Methodsmentioning

confidence: 99%

Short-term chromium(VI) stress induces different photosynthetic responses in two duckweed species, Lemna gibba L. and Lemna minor L.

Oláh¹,

Lakatos²,

Bertók³

et al. 2010

Photosynt.

View full text Add to dashboard Cite

Physiological responses of two duckweed species, Lemna gibba and Lemna minor, to hexavalent chromium [Cr (VI)] were studied in axenic cultures using short-term (48 h) treatments by K 2 Cr 2 O 7 (0-200 μM). Chlorophyll (Chl) fluorescence parameters and photosynthetic pigment composition of plants were screened to determine the effects of Cr(VI) exposures. The two duckweed species exhibited different sensitivity in the applied Cr(VI) concentration range. Chl fluorescence parameters of dark-adapted and light-adapted plants and electron transport inducibility were more sensitive to Cr(VI) in L. minor than in L. gibba. We also found fundamental differences in quantum yield of regulated, Y(NPQ), and nonregulated, Y(NO), non-photochemical quenching between the two species. As Cr(VI) concentration increased in the growth medium, L. minor responded with considerable increase of Y(NPQ) with a parallel significant increase of Y(NO). By contrast, in L. gibba only 200 μM Cr(VI) in the growth medium resulted in elevation of Y(NPQ) while Y(NO) remained more or less constant within the regarding Cr(VI) concentration range during 48 h. Photosynthetic pigment content did not change considerably during the short-term Cr(VI) treatment but decrease of Chl a/b and increase of Car/Chl ratios were observed in good accordance with the changes in Chl fluorescence parameters. The data suggest that various duckweed species respond with different sensitivity to the same ambient concentrations of Cr(VI) in the growth medium, and presumably to other environmental stresses too, which may have an influence on their competitive relations when heavy metal pollution occurs in aquatic ecosystem.

show abstract

Section: Methodsmentioning

confidence: 99%

Short-term chromium(VI) stress induces different photosynthetic responses in two duckweed species, Lemna gibba L. and Lemna minor L.

Oláh¹,

Lakatos²,

Bertók³

et al. 2010

Photosynt.

View full text Add to dashboard Cite

show abstract

“…Due to its small size and ease of growth, duckweed species make useful organisms for toxicity testing (Lakatos et al 1993). Duckweed species offer many advantages for the testing of toxic compounds.…”

Section: As An Inexpensive and Accurate Way Of Toxicity Testingmentioning

confidence: 99%

Plant Nutrient Phytoremediation Using Duckweed

Landesman

Fedler

Duan

2010

Eutrophication: Causes, Consequences and Control

View full text Add to dashboard Cite

Over the last 40 years a great deal of research has been published on the use of duckweed to treat wastewater both from point sources (feedlots, food processing plants) and from non-point sources. These plants can recover nutrients such as nitrogen and phosphorus from contaminated waters in those agricultural practices. They can also remove or accumulate metals, radionuclides, and other pollutants in their tissues. In addition, the duckweed can be used as a feed source for livestock and poultry as well as an energy source for biofuel production. A summary of some of the published work done using duckweed species to phytoremediate natural, domestic, industrial, and agricultural wastewaters is presented.

show abstract

“…In contrast to chemical analysis, bioassays provide integral information on interactions between the test organism and its environment. Duckweed is a monocotyledonous, free-floating higher aquatic plant whose foliar (frond) area and chlorophyll content show high sensitivity towards aqueous toxicants [27,28].…”

Section: Duckweed (Lemna Minor) Growth Rate Inhibition Testmentioning

confidence: 99%