Intracellular microcystins degradation and acute toxicity decrease towards Daphnia similis by low electron-beam irradiation doses
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Algal Research
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Ionizing radiation has attracted attention due to its ability to inhibit pathogens and microorganisms, with low
doses reported as being able to degrade cyanotoxins and inhibit toxic cyanobacteria growth. In this context, the
aim of the present study was to investigate how electron beam irradiation (EBI) applied at doses between 1 and
10 kGy affect intracellular and extracellular microcystin variants. Effects on M. aeruginosa culture recovery, as
well as changes in physico-chemical cyanobacterial suspension parameters and water quality alterations were
assessed through ecotoxicity assays. The findings indicate that doses over 2 kGy may are lethal to M. aeruginosa
even at 48 h post-irradiation. Concerning physico-chemical parameters, exposure to 2–5 kGy doses decrease pH
values and later stabilizing. At least 50 % of intracellular MC led to significant degradation of all variants at 3
kGy. No acute toxicity effects were observed in Daphnia similis exposed to sample supernatants. Statistically
significant differences were observed when cladocerans were exposed to M. aeruginosa cells treated with EBI
doses ranging from 3 to 10 kGy compared to non-treated cyanobacterial suspensions. These findings suggest that
low EBI radiation doses are suitable for the control of toxic cyanobacteria in water treatment processes, providing
a less toxic environment compared to non-treated solutions.
Como referenciar
SILVA, THALITA T.; JACINAVICIUS, FERNANDA R.; PINTO, ERNANI; BORRELY, SUELI I. Intracellular microcystins degradation and acute toxicity decrease towards Daphnia similis by low electron-beam irradiation doses. Algal Research, v. 72, p. 1-7, 2023. DOI: 10.1016/j.algal.2023.103086. Disponível em: http://repositorio.ipen.br/handle/123456789/34078. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.