Characterization of cellular toxicity induced by sub-lethal inorganic mercury in the marine microalgae Chlorococcum dorsiventrale isolated from a metal-polluted coastal site

Thabet, Jihen; Elleuch, Jihen; Martínez, Felipe González; Abdelkafi, Slim; Hernández, Luís E.; Fendri, Imen

doi:10.1016/j.chemosphere.2023.139391

Cited by 6 publications

(3 citation statements)

References 102 publications

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“…Further, a decrease in protein content and increase in the amount of reactive oxygen species (ROS) was reported in the study [128]. Chronic exposure to Hg in Chlorococcum dorsiventrale Ch-UB5 collected from coastal areas of Tunisia was observed to cause reduction in biomass, altered redox activities, inhibition of photochemical activity, and appearance of oxidative stress [129]. The toxicity of Hg to microalgae is majorly due to its interaction with SH groups of the enzymes and imparting OS.…”

Section: Mercury Toxicity To Plants and Algaementioning

confidence: 85%

A Retrospection on Mercury Contamination, Bioaccumulation, and Toxicity in Diverse Environments: Current Insights and Future Prospects

Kumar,

Umesh,

Shanmugam

et al. 2023

Sustainability

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Owing to various industrial applications of mercury (Hg), its release into the environment at high concentration is becoming a great threat to living organisms on a global scale. Human exposure to Hg is greatly correlated with contamination in the food chain through cereal crops and sea foods. Since Hg is a non-essential component and does not possess a biological role and exhibits carcinogenic and genotoxic behaviour, biomonitoring with a focus on biomagnification of higher living animals and plants is the need of the hour. This review traces the plausible relationship between Hg concentration, chemical form, exposure, bioavailability, bioaccumulation, distribution, and ecotoxicology. The toxicity with molecular mechanisms, oxidative stress (OS), protein alteration, genomic change, and enzymatic disruptions are discussed. In addition, this review also elaborates advanced strategies for reducing Hg contamination such as algal and phytoremediation, biochar application, catalytical oxidation, and immobilization. Furthermore, there are challenges to overcome and future perspectives considering Hg concentrations, biomarkers, and identification through the nature of exposures are recommended.

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Section: Mercury Toxicity To Plants and Algaementioning

confidence: 85%

A Retrospection on Mercury Contamination, Bioaccumulation, and Toxicity in Diverse Environments: Current Insights and Future Prospects

Kumar,

Umesh,

Shanmugam

et al. 2023

Sustainability

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show abstract

“…The 18S rRNA-encoding gene was successfully ampli ed using the universal primers EukA and EukB and subsequently sequenced. Through sequence comparison with DNA sequences available in the GenBank database, utilizing the BLAST web interface (http://blast.ncbi.nlm.nih.gov/Blast.cgi), the isolated microalgae strain was conclusively identi ed as Chlorococcum dorsiventrale (Thabet et al, 2023).…”

Section: Isolation and Identi Cation Of The Microalga Strainmentioning

confidence: 99%

“…These defense capabilities are driven by and/or entail the synthesis of antioxidants, pigments accumulation and bioproducts synthesis (Balzano et al, 2020;Vidya et al, 2023). In this sense, the microalgae Chlorococcum dorsiventrale has demonstrated its e ciently in removing heavy metals while displaying good resistance and tolerance to the resulting stress (Thabet et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Heavy metals removal by the microalgae Chlorococcum dorsiventrale : insights from enzymatic and molecular analysis

Hmani,

Elleuch,

Elleuch

et al. 2024

Preprint

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Heavy metals are one of the main threats to marine life and ecosystems and any remedial action in that regard is urgently required. The aim of this work is to study the bioaccumulation of cadmium, chromium and lead in the microalgae Chlorococcum dorsiventrale isolated from Tunisian coastal waters along with assessing its enzymatic and molecular responses. This strain tolerated Cd and Cr accumulation while resisting that of Pb. Cd and Cr exposures elicited a decrease in chlorophyll, lipid and polysaccharide contents whereas no damages were detected following Pb treatment. For protein content, no significant changes were seen except for Pb which exhibited a slight increase after treatment with 5 mg/L. Stress defense-related genes expression using qRT-PCR revealed that exposure to Pb and Cr induced an up-regulation of catalase, superoxide dismutase and photosystem II protein D1 encoding genes while heat shock protein 70 was slightly overexpressed. As a result, removal efficiencies for Cr and Pb attained 89% and 95% respectively. The mechanisms whereby C. dorsiventrale was able to induce Cr biosorption were intracellular and extracellular adsorption while Pb was predominantly removed by adsorption.

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Responses of Dunaliella sp. AL-1 to chromium and copper: Biochemical and physiological studies

Elleuch,

Thabet,

Ghribi

et al. 2024

Chemosphere

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Characterization of cellular toxicity induced by sub-lethal inorganic mercury in the marine microalgae Chlorococcum dorsiventrale isolated from a metal-polluted coastal site

Cited by 6 publications

References 102 publications

A Retrospection on Mercury Contamination, Bioaccumulation, and Toxicity in Diverse Environments: Current Insights and Future Prospects

A Retrospection on Mercury Contamination, Bioaccumulation, and Toxicity in Diverse Environments: Current Insights and Future Prospects

Heavy metals removal by the microalgae Chlorococcum dorsiventrale : insights from enzymatic and molecular analysis

Responses of Dunaliella sp. AL-1 to chromium and copper: Biochemical and physiological studies

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