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Titolo:
Applicability of growth rate, cell shape, and motility of Euglena gracilisas physiological parameters for bioassessment at lower concentrations of toxic substances: An experimental approach
Autore:
Danilov, RA; Ekelund, NGA;
Indirizzi:
Mid Sweden Univ, Dept Appl Sci, S-87188 Harnosand, Sweden Mid Sweden UnivHarnosand Sweden S-87188 Sci, S-87188 Harnosand, Sweden
Titolo Testata:
ENVIRONMENTAL TOXICOLOGY
fascicolo: 1, volume: 16, anno: 2001,
pagine: 78 - 83
SICI:
1520-4081(200102)16:1<78:AOGRCS>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
UV-B RADIATION; POLLUTION-CONTROL; PAPER-INDUSTRY; TEST ORGANISM; FLAGELLATE; INHIBITION; SYSTEMS; METALS; GREEN; ALGAE;
Keywords:
Euglena gracilis; motility; cell shape; growth rate; waste water; pulp and paper industry; ultraviolet-B radiation (280-320 nm); toxicity assessment;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Danilov, RA Mid Sweden Univ, Dept Appl Sci, S-87188 Harnosand, Sweden Mid Sweden Univ Harnosand Sweden S-87188 8 Harnosand, Sweden
Citazione:
R.A. Danilov e N.G.A. Ekelund, "Applicability of growth rate, cell shape, and motility of Euglena gracilisas physiological parameters for bioassessment at lower concentrations of toxic substances: An experimental approach", ENVIRON TOX, 16(1), 2001, pp. 78-83

Abstract

The responses of the growth rate, motility, and cell shape in the green flagellate Euglena gracilis to different concentrations of waste water substances from the pulp and paper industry were tested in a long-term study (7 days). Samples before (uncleaned sample) and after (cleaned sample) the treatment in a cleaning system were studied. The influence of different doses of UV-B radiation on cell shape and motility was also investigated. No statistically significant effects of increasing concentrations of the waste substances both before and after the cleaning process (except inhibition by theundiluted uncleaned effluent) on the growth rate in E. gracilis were observed. Cell shape turned out to be an unreliable physiological parameter for assessing the toxicity at lower concentrations of waste water substances. No significant patterns could be observed in the response of the cell shape to the different concentrations of the waste water substances or to UV-B radiation. Motility has been concluded to be a more sensitive parameter than cell shape. However, no clear patterns were observed in the response of themotility to the different concentrations of the waste water substances studied. Increasing concentrations of the uncleaned sample demonstrated a defense against UV-B radiation, due to the high absorbance in the UV-B range, when effects on motility were examined. We conclude that contrary to the results reported in the literature earlier, cell shape and motility of E. gracilis are not universal physiological parameters for bioassessment at lower concentrations of toxic substances, including metals such as copper and zinc from the pulp and paper industry. The long-duration tests had, in general, higher significance than those of short duration. (C) 2001 by John Wiley Sc Sons, Inc.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 31/05/20 alle ore 13:08:57