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Detection of oxidative stress and DNA damage in freshwater snail Lymnea leuteola exposed to profenofos

Frontiers of Environmental Science & Engineering 2018年第5期12卷 181-187页

作者： Daoud Ali Huma Ali Saud Alifiri Saad Alkahtani abdullah a alkahtane Shaik Althaf Huasain Department of Zoology College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia 2 Department of ChemistryMANITBhopal 462003India

Extensive production and use of organophosphate pesticide in agriculture,has risen concerned about its ecotoxicity and risk assessment of insecticides,which are more ***,the present investigation was aimed to study the induction of oxidative stress and DNA damage by organophosphate insecticide profenofos(PFF)in freshwater snail Lymnea luteola(***).The median lethal value(96 h LC50)of PFF was estimated as 1.26 mg/L for *** in a semi-static system and on the basis of LC50 value three concentrations viz.,0.126(1/10 of LC50,Sublethal I),0.63(1/2 of LC50,Sublethal II)and 0.84 mg/L(2/3 of LC50,Sublethal III)were *** were exposed to above-mentioned concentrations of PFF along with solvent control(acetone)and negative control for 96 *** haemolymph was collected at 24 and 96 h of after *** heamolymph of PFF exposed snail,lipid peroxide,glutathione reduced glutathione S transferase and superoxide dismutase activities at the tested concentrations significantly differ from those in the *** genotoxicity induced in hemocytes of treated snails was measured by alkaline single cell gel electrophoresis *** data of this experiment demonstrated significantly enhancement of oxidative stress and DNA damage in the treated snails as compared to ***,we observed statistically significant correlations of ROS with DNA damage(%tail DNA)(R^(2)=0.9708)for 24 h and DNA damage(R^(2)=0.9665)for 96 *** of the current experiment can be useful in risk evaluation of PFF among aquatic *** study confirmed the use of comet assay for in vivo laboratory experiments using freshwater snail for selecting the toxic potential of industrial chemicals and environmental contaminants.

关键词： Acute toxicity Profenofos ROS oxidative stress DNA damage Lymnea luteola

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Late Ordovician cornulitid tubeworms from high-latitude peri-Gondwana(Sardinia and the Pyrenees)and their palaeobiogeographic significance

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Journal of Palaeogeography 2024年第4期13卷 939-953页

作者： Olev Vinn Jorge Colmenar Samuel Zamora Sofia Pereira Gian Luigi Pillola abdullah Aalkahtane Saleh Al Farraj Magdy El Hedeny Institute of Ecology and Earth Sciences University of TartuRavila 14A50411 TartuEstonia Instituto Geológico y Minero de España-CSIC La Calera 128760 Tres CantosSpain Instituto Geológico y Minero de España-CSIC Residencia CSICCampus Aula DeiAvenue Montañana 100550006 ZaragozaSpain Centro de Geociências Departamento de Ciências da TerraUniversidade de CoimbraRua Sílvio Lima3030-790 CoimbraPortugal Dipartimento di Scienze Chimiche e Geologiche Universitàdegli Studi di CagliariCittadella UniversitariaBlocco A09042 MonserratoItaly College of Science King Saud UniversityKingdom of Saudi Arabia Geology Department Faculty of ScienceAlexandria UniversityEgypt

Seven Cornulites species,including a new one—Cornulites leonei ***.,are described from the Upper Ordovician Portixeddu Formation(Katian,stage slices Ka2-3)of Sardinia and the Cavá(lower Katian,stage slice Ka2)and Estana(upper Katian,stage slices Ka3-4)formations of the *** Sardinian and Pyrenean cornulitids represent an adaptation to live in environments with high sedimentation rates and limited hard substrates *** prominent annuli could have had a stabilizing function in the soft sediment that helped cornulitids to keep a favourable position in the sediment to enable suspension *** known Late Ordovician cornulitid diversity in different Gondwana areas is low,usually ranging from one to three taxa,being higher(seven)in *** other benthic groups during the Late Ordovician,the cornulitid tubeworm faunas within the high-latitude peri-Gondwana Province indicate a certain endemism and share morphological and ecological affinities,such as a small body size and tubes with a strikingly small apical *** essentially endemic,some links with cornulitids from the Late Ordovician of Scotland are revealed.

关键词： Tentaculitid tubeworms Cornulites Mediterranean Palaeoecology Katian

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