A common process of bioaccumulation of rare earth elements, iron, and aluminium in three Tetrahymena species

Understanding how organisms interact with elements used in technical applications is essential because of the increasing prevalence of these elements in the environment. The unicellular eukaryote ciliate Tetrahymena can tolerate high concentrations of cytotoxic metals and is known to have developed...

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Vydané v:	Ecotoxicology and environmental safety Ročník 302; s. 118604
Hlavní autori:	Kohl-Chandramohan, Jana, Schweikert, Michael, Junginger, Tobias, Hartenbach, Ingo, Lemloh, Marie-Louise
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Netherlands Elsevier Inc 01.09.2025 Elsevier
Predmet:	Aluminum - metabolism Aluminum - toxicity Bioaccumulation Heavy metal depletion Iron - metabolism Iron - toxicity Metal-containing particle Metals, Rare Earth - metabolism Metals, Rare Earth - toxicity Rare earth element Tetrahymena Tetrahymena - drug effects Tetrahymena - metabolism Water Pollutants, Chemical - metabolism Heavy metal depletion Tetrahymena Rare earth element Metal-containing particle Bioaccumulation
ISSN:	0147-6513, 1090-2414, 1090-2414
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Shrnutí:	Understanding how organisms interact with elements used in technical applications is essential because of the increasing prevalence of these elements in the environment. The unicellular eukaryote ciliate Tetrahymena can tolerate high concentrations of cytotoxic metals and is known to have developed several detoxification strategies, in particular the intracellular bioaccumulation. In this study, we systematically investigated the process of tolerance and intracellular bioaccumulation of several metals (La, Ce, Sm, Eu, Gd, Dy, Fe, and Al) in three species of the ciliate Tetrahymena (T. pyriformis, T. thermophila, and T. pigmentosa). In all three species and for all tested elements, treatment of the cells with dissolved metals in an organic growth medium leads to an intracellular bioaccumulation and formation of biogenic metal-containing particles within the food vacuoles of the cells. Stable particles are excreted into the surrounding medium within 2 h. The particles have a species-dependent diameter between 2.4 and 3.2 µm and consist of the respective added metal La, Ce, Sm, Eu, Gd, Dy, Fe, or Al together with the elements C, O, P, Na, Mg, K, and Ca. Intracellular bioaccumulation is associated with a 26–87 % depletion of the rare earth element concentrations in the medium within 48 h. The understanding of microbial bioaccumulation pathways is a promising approach for the development of new bio-inspired strategies for recycling or remediation applications. [Display omitted] •Intracellular bioaccumulation of REEs, Fe, and Al to metal-organic particles.•Common process in the ciliates T. thermophila, T. pigmentosa, and T. pyriformis.•26–87 % depletion of rare earth element concentration by the cells.•Excretion of species depended sized (2.4–3.2 µm) metal-containing particles.
Bibliografia:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0147-6513 1090-2414 1090-2414
DOI:	10.1016/j.ecoenv.2025.118604