Comparative toxicity of physiological and biochemical parameters in Euglena gracilis to short-term exposure to potassium sorbate
| Autor: | Gilmar Sidnei Erzinger, Lineu Fernando Del Ciampo, Donat Peter Häder, Carmen Diamantina Teixeira Heyder, Fernanda Engel, Luciano Henrique Pinto, Luciano Lorenzi |
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| Rok vydání: | 2014 |
| Předmět: |
Euglena gracilis
Health Toxicology and Mutagenesis Potassium ved/biology.organism_classification_rank.species chemistry.chemical_element Management Monitoring Policy and Law Photosynthetic efficiency Toxicology Euglena chemistry.chemical_compound Toxicity Tests Acute Bioassay Photosynthesis Potassium sorbate biology ved/biology General Medicine biology.organism_classification Acute toxicity Sorbic Acid chemistry Biochemistry Sorbic acid Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Ecotoxicology (London, England). 24(1) |
| ISSN: | 1573-3017 |
| Popis: | Potassium sorbate is the potassium salt of sorbic acid, is a widespread and efficient antioxidant that has multiple functions in plants, traditionally associated with the reactions of photosynthesis; however, it has moderate toxicity to various species including rat, fish, bacteria and human health. The effects of potassium sorbate on the movement and photosynthetic parameters of Euglena gracilis were studied during short-term exposure. Potassium sorbate showed acute toxicity to the green flagellate E. gracilis affecting different physiological parameters used as endpoints in an automatic bioassay such as motility, precision of gravitational orientation (r-value), upward movement and alignment, with mean EC50 values of 2867.2 mg L(-1). The concentrations above 625 mg L(-1) of potassium sorbate induce an inhibition of the photosynthetic efficiency and electron transport rate and, in concentrations more than 2500.0 mg L(-1), the Euglena cells undergo a complete inhibition of photosynthesis even at low light irradiation. |
| Databáze: | OpenAIRE |
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