Lanthanides and Algae

Vítová, Milada; Čížková, Mária; Zachleder, Vilém

doi:10.5772/intechopen.80260

Cited by 7 publications

(6 citation statements)

References 133 publications

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“…(2021) observed moderate removal efficiency in the cyanobacterium Arthrospira platensis . Lanthanides, such as Sm, can bind to storage polysaccharides and pigments (Vítová et al., 2018). Using TEM‐EDX microanalyses, we observed a higher presence of what seemed to be acidocalcisomes or autophagic vacuoles of different sizes filled with a dark matrix in the CSm4 Strain.…”

Section: Discussionmentioning

confidence: 99%

Settling selection of Chlamydomonas reinhardtii for samarium uptake

Martinez‐Alesón García,

García‐Balboa,

López‐Rodas

et al. 2024

Journal of Phycology

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Samarium (Sm) is a rare‐earth element recently included in the list of critical elements due to its vital role in emerging new technologies. With an increasing demand for Sm, microbial bioremediation may provide a cost‐effective and a more ecologically responsible alternative to remove and recover Sm. We capitalized on a previously selected Chlamydomonas reinhardtii strain tolerant to Sm (1.33 × 10−4 M) and acidic pH and carried out settling selection to increase the Sm uptake performance. We observed a rapid response to selection in terms of cellular phenotype. Cellular size decreased and circularity increased in a stepwise manner with every cycle of selection. After four cycles of selection, the derived CSm4 strain was significantly smaller and was capable of sequestrating 41% more Sm per cell (1.7 × 10−05 ± 1.7 × 10−06 ng) and twice as much Sm in terms of wet biomass (4.0 ± 0.4 mg Sm · g−1) compared to the ancestral candidate strain. The majority (~70%) of the Sm was bioaccumulated intracellularly, near acidocalcisomes or autophagic vacuoles as per TEM‐EDX microanalyses. However, Sm analyses suggest a stronger response toward bioabsorption resulting from settling selection. Despite working with Sm and pH‐tolerant strains, we observed an effect on fitness and photosynthesis inhibition when the strains were grown with Sm. Our results clearly show that phenotypic selection, such as settling selection, can significantly enhance Sm uptake. Laboratory selection of microalgae for rare‐earth metal bioaccumulation and sorption can be a promising biotechnological approach.

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Section: Discussionmentioning

confidence: 99%

Settling selection of Chlamydomonas reinhardtii for samarium uptake

Martinez‐Alesón García,

García‐Balboa,

López‐Rodas

et al. 2024

Journal of Phycology

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“…Luminophores from two different sources (fluorescence lamps and energy saving light bulbs) were tested. In spite of the low solubility of luminophores, G. phlegrea could grow in the presence of luminophores and accumulate REEs [63,64].…”

Section: Rare Earth Elementsmentioning

confidence: 99%

The Red MicroalgaGaldieriaas a Promising Organism for Applications in Biotechnology

Čížková¹,

Vítová²,

Zachleder³

2020

Microalgae - From Physiology to Application

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The genus Galdieria refers to red algae and includes microscopic inhabitants of highly acidic (pH 1-2), often volcanic habitats. They are thermophilic or thermo-tolerant organisms, some of them surviving temperatures up to 56°C. As other extremophilic microorganisms, they exhibit unique features derived from their modified metabolisms. In this chapter, we will review the special abilities of Galdieria species such as metabolic flexibility to grow photoautotrophically, heterotrophically or mixotrophically, ability to utilize a whole range of unusual carbon sources, capability of surviving extreme environments or their extremely high resistance to metals. We will discuss the potential of Galdieria for applications in biotechnology, for example, phycocyanin production, nutrient removal from urban wastewaters, bio-mining, treatment of acidic mine drainage, selective metal precipitation, bioremediation of acidic metal-contaminated areas or recovery of critical and scarce metals from secondary sources.

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“…References Heterotrophic growth Yes Yes Gross & Schnarrenberger, 1995;Oesterhelt et al, 1999;Schonknecht et al, 2013;Moriyama et al, 2015;Sloth et al, 2017 C-PC production Yes Yes Schmidt et al, 2005;Sloth et al, 2006, Sloth et al, 2017Graverholt & Eriksen, 2007;Wan et al, 2016;Carfagna et al, 2018;Wang et al, 2019;Rahman et al, 2020 C-PC extraction Yes Yes Sørensen et al, 2013;Moon et al, 2014;Rahman et al, 2017;Imbimbo et al, 2019 Waste stream treatment Yes N.A. Kurano et al, 1995;Selvaratnam et al, 2014;Minoda et al, 2015;Vítová et al, Ohta et al, 1998;Matsuzaki et al, 2004;Barbier et al, 2005;Schonknecht et al, phototrophically, has a cell wall, and has not yet been accessible to genetic modification. Galdieria reveals its key potential in its ability to grow heterotrophically on multiple organic carbon sources including glucose, glycerol, molasses, food wastes and cherry brine (Table 1; Schmidt et al, 2005;Sloth, Wiebe, & Eriksen, 2006, Sloth et al, 2017.…”

Section: Galdieria Cyanidioschyzonmentioning

confidence: 99%

Exploiting the potential of Cyanidiales as a valuable resource for biotechnological applications

et al. 2020

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The biotechnological uses of algae and cyanobacteria have been widely discussed in the context of climate change and consequent efforts to circularize economies, minimize carbon release and reuse waste streams. Their great potential in bioproduction and bioremediation has barely been exploited, particularly for the well-characterized red algae Galdieria sulphuraria and Cyanidioschyzon merolae. These and other Cyanidiales are excellent candidates for biotechnological enhancement and metabolic engineering for a broad spectrum of applications including the production of biofuels and thermostable colourants. In particular, extremophily, such as growth at thermophilic temperaturesup to 60°Cand at low pH and high salinity, make these algae unusually resistant to contamination and pathogens, and therefore potentially more commercially viable. We review existing applications of the Cyanidiales, as well as their available molecular tools. Their varied nutritional demands, from the broad heterotrophy of G. sulphuraria to strongly autotrophic C. merolae, along with their ability to grow to high densities, confer great potential as expression hosts. We also discuss the deficiencies that must be overcome to unlock further applications and ultimately to embed thermophilic red algae into a framework of circular and sustainable economic activity relying on bio-based sources.

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Lanthanides and Algae

Cited by 7 publications

References 133 publications

Settling selection of Chlamydomonas reinhardtii for samarium uptake

Settling selection of Chlamydomonas reinhardtii for samarium uptake

The Red MicroalgaGaldieriaas a Promising Organism for Applications in Biotechnology

Exploiting the potential of Cyanidiales as a valuable resource for biotechnological applications

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