The effect of engineered iron nanoparticles on growth and metabolic status of marine microalgae cultures
Abstract
Synthetic zero-valent nano-iron (nZVI) compounds are finding numerous applications in environmental remediation owing to their high chemical reactivity and versatile catalytic properties. Studies were carried out to assess the effects of three types of industrially relevant engineered nZVI on phytoplankton growth, cellular micromorphology and metabolic status. Three marine microalgae (Pavlova lutheri, Isochrysis galbana and Tetraselmis suecica) were grown on culture medium fortified with the nano-Fe compounds for 23 days and subsequent alterations in their growth rate, size distribution, lipid profiles and cellular ultrastructure were assessed. The added nano Fe concentrations were either equimolar with the EDTA-Fe conventionally added to the generic f/2 medium (i.e. 1.17 × 10(-5)M), or factor 10 lower and higher, respectively. We provide evidence for the: (1) broad size distribution of nZVI particles when added to the nutrient rich f/2 media with the higher relative percentage of the smallest particles with the coated forms; (2) normal algal growth in the presence of all three types of nZVIs with standard growth rates, cellular morphology and lipid content comparable or improved when compared to algae grown on f/2 with EDTA-Fe; (3) sustained algal growth and normal physiology at nZVI levels 10 fold below that in f/2, indicating preference to nanoparticles over EDTA-Fe; (4) increased total cellular lipid content in T. suecica grown on media enriched with uncoated nZVI25, and in P. lutheri with inorganically coated nZVI(powder), when compared at equimolar exposures; (5) significant change in fatty acid composition complementing the nZVI(powder)-mediated increase in lipid content of P. lutheri; (6) a putative NP uptake mechanism is proposed for I. galbana via secretion of an extracellular matrix that binds nZVIs which then become bioavailable via phagocytotic membrane processes.
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The growth and physiology of microalgae are affected by various metabolic processes, which determine cellular abundance, biometry and micromorphology, as well as lipid production.
“The growth and physiology of microalgae are affected by various metabolic processes, which determines cellular abundance, biometry and micromorphology, as well as lipid production [96].”
From Factors Affecting Microalgae Production for Biofuels and the Potentials of Chemometric Methods in Assessing and Optimizing Productivity (2019) · cites this paper as [96]
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- Authors
- Kadar, E., Rooks, P., Lakey, C., & White, D. A.
- Affiliations
- Plymouth Marine Laboratory (GB)
- Venue
- Science of The Total Environment
- Publisher
- Elsevier BV
- Published
- 2012-11
- Volume
- 439
- Pages
- 8-17
- ISSN
- 0048-9697 (ISSN-L)
- OpenAlex
- W2076258921
- Cited by
- 148
- References
- 50
- Citations by year
- 2026: 7 · 2025: 5 · 2024: 15 · 2023: 17 · 2022: 22 · 2021: 12 · 2020: 13 · 2019: 13 · 2018: 3 · 2017: 12 · 2016: 14 · 2015: 5 · 2014: 5 · 2013: 5
- FWCI
- 2.20
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- The Science of The Total Environment (publishedVersion)
- PubMed (publishedVersion)
- Funders
- Natural Environment Research Council (pml010005)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Nanoparticles: synthesis and applications
- Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
- Keywords
- marine microalgae, algal growth, phytoplankton, Pavlova lutheri, Isochrysis galbana, Tetraselmis suecica, fatty acid composition, extracellular matrix, cell ultrastructure, particle size distribution, coated nanoparticles, F/2 medium, environmental remediation
- MeSH terms
- Fatty Acids, Marine Biology, Particle Size, Research Design, Seawater, Surface Properties, Water Pollutants, Chemical, Lipid Metabolism, Nanoparticles, Iron Compounds, Microalgae
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