Toxicity of mine dump effluent containing five hexachlorocyclohexane (α, β, γ, δ and ε-HCH, sum 159.4 μg/L) and two trichlorobenzene (TCB, sum 65.2 μg/L) isomers to two microalgae (Scenedesmus quadricauda and Coccomyxa subellipsoidea) was studied over 24 h exposure and also with 2- and 10-fold diluted stock solution (i.e. 1×, 0.5× and 0.1× strength). Individual isomers revealed rather dose-dependent accumulation typically higher in Scenedesmus than in Coccomyxa (max. sum of HCH 14.99 μg/g DW with bioaccumulation factor 94) and δ-HCH was dominant isomer. TCB isomers showed low accumulation in algae. 0.1× dose elevated chlorophylls and carotenoids in Coccomyxa while enzymatic activities (SOD, CAT, and APX), thiols (glutathione and phytochelatin 2) and ascorbic acid were rather elevated by 1× dose in both species. Malic acid, rather than citric acid, increased in response to 0.5× and 1× concentration. Sum of fatty acids was higher in Coccomyxa than in Scenedesmus with palmitic, oleic, linoleic and α-linolenic acids being dominant compounds in both species. Detailed profiling revealed that saturated and monounsaturated fatty acids increased in Coccomyxa while polyunsaturated fatty acids in Scenedesmus in response to increasing dose of organochlorines. Accumulation of organochlorines and metabolic responses in algae are reported here for the first time.
- MeSH
- chemické látky znečišťující vodu toxicita MeSH
- chlorbenzeny toxicita MeSH
- Chlorophyta účinky léků metabolismus MeSH
- hexachlorcyklohexan toxicita MeSH
- hornictví MeSH
- mastné kyseliny metabolismus MeSH
- mikrořasy účinky léků metabolismus MeSH
- průmyslový odpad MeSH
- sulfhydrylové sloučeniny metabolismus MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Concise international chemical assessment document, ISSN 1020-6167 60
iii, 55 s. : tab. ; 30 cm
- MeSH
- chlorbenzeny toxicita škodlivé účinky MeSH
- hodnocení rizik MeSH
- nebezpečné látky MeSH
- vystavení vlivu životního prostředí MeSH
- Konspekt
- Veřejné zdraví a hygiena
- NLK Obory
- environmentální vědy
- toxikologie
- hygiena
- NLK Publikační typ
- publikace WHO
- MeSH
- chlorbenzeny otrava toxicita MeSH
