In vivo studies on hepato-renal impairments in freshwater fish Cyprinus carpio following exposure to sublethal concentrations of sodium cyanide

Sodium cyanide, is highly contaminating aquatic ecosystems as a toxic pollutant, was investigated in the present study for acute toxicity on freshwater fish Labeo rohita. The toxicity tests were conducted by static renewal bioassay method on the juveniles of fish was evaluated. The LC50 value of sodium cyanide to Labeo rohita was found out to be 320 ?g l-1. One third (106 ?g l-1) and one fifth (64 ?g l-1) of the LC50 value was selected for sublethal studies. Behavioural patterns and oxygen consumption were observed in both (1/3rd and 1/5th) sublethal concentrations (1, 5, 10 and 15 days). Sodium cyanide is highly toxic to the animal tested. Fish behaved irregular, erratic, and dartic movements, by followed hyperexcitability, loss of balance, finally settles to the bottom of the test chamber. A decrease in oxygen consumption was observed in 1/3rd (11.62% and -4.52%) and 1/5th (9.11% and -2.82%) sublethal concentrations. Fish under sublethal concentration were found to be under stress but not fatal.

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In Vivo Inhibition of Acetylcholinesterase Activity in Functionally Different Tissues of the Freshwater Fish, Cyprinus carpio, Under Chlorpyrifos Exposure

Drug Metabolism and Drug Interactions ◽

10.1515/dmdi.2009.24.2-4.123 ◽

2009 ◽

Vol 24 (2-4) ◽

Cited By ~ 3

Author(s):

R. Halappa ◽

M. David

Keyword(s):

Freshwater Fish ◽

Cyprinus Carpio ◽

Acetylcholinesterase Activity ◽

Different Tissues

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Lipid synthesis by isolated duckweed (Lemna minor) chloroplasts in the presence of a sublethal concentration of atrazine

Canadian Journal of Botany ◽

10.1139/b89-289 ◽

1989 ◽

Vol 67 (8) ◽

pp. 2261-2265 ◽

Cited By ~ 1

Author(s):

Gilles Grenier ◽

Luce Proteau ◽

Gaston Beaumont

Keyword(s):

Linolenic Acid ◽

Lemna Minor ◽

Specific Radioactivity ◽

Lipid Synthesis ◽

Thylakoid Membranes ◽

Sublethal Concentration ◽

In Vivo Studies ◽

High Level ◽

Sublethal Concentrations

We have examined the effects of a sublethal concentration of atrazine on the incorporation of sodium-[U-14C] acetate into isolated chloroplast lipids of Lemna minor. A high level of [14C]-acetate was incorporated into diacylgalactosylglycerol (DGG) and diacylglycerol (DAG). Consequently, the conversion of phosphatide acid to DAG and that of DAG to DGG seems to be as active in L. minor (an "18:3-plant") as in "16:3-plants." Chloroplast lipids from atrazine-treated plants were more extensively labelled with [14C]-acetate than the control plants. These results are in agreement with our previous in vivo studies which suggest that sublethal concentrations of atrazine stimulate the lipid metabolism of L. minor to form more thylakoid membranes. Furthermore, the specific radioactivity of linolenic acid was the highest in DAG and the lowest in DGG. These data suggest that desaturation of linoleic acid to linolenic acid mainly occurs before the galactosylation of DAG to form DGG in L. minor.

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