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Acclimation of Microalgae to Wastewater Environments Involves Increased Oxidative Stress Tolerance Activity

Osundeko, Olumayowa
; 
Dean, Andrew P.
; 
Davies, Helena
; 
Pittman, Jon K.
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Affiliation
University of Manchester; University of Chester
EPub Date
Publication Date
2014-09-16
Submitted Date
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Chemical Engineering
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Abstract
A wastewater environment can be particularly toxic to eukaryotic microalgae. Microalgae can adapt to these conditions but the specific mechanisms that allow strains to tolerate wastewater environments are unclear. Furthermore, it is unknown whether the ability to acclimate microalgae to tolerate wastewater is an innate or species-specific characteristic. Six different species of microalgae (Chlamydomonas debaryana, Chlorella luteoviridis, Chlorella vulgaris, Desmodesmus intermedius, Hindakia tetrachotoma, Parachlorella kessleri) that had never previously been exposed to wastewater conditions were acclimated over an eight week period in secondary-treated municipal wastewater. With the exception of C. debaryana, acclimation to wastewater resulted in significantly higher growth rate and biomass productivity. With the exception of C. vulgaris, total chlorophyll content was significantly increased in all acclimated strains, while all acclimated strains showed significantly increased photosynthetic activity. The ability of strains to acclimate was species-specific, with two species, C. luteoviridis and P. kessleri, able to acclimate more efficiently to the stress than C. debaryana and D. intermedius. Metabolic fingerprinting of the acclimated and non-acclimated microalgae using Fourier transform infrared spectroscopy was able to differentiate strains on the basis of metabolic responses to the stress. In particular, strains exhibiting greater stress response and altered accumulation of lipids and carbohydrates could be distinguished. The acclimation to wastewater tolerance was correlated with higher accumulation of carotenoid pigments and increased ascorbate peroxidase activity.
Citation
Osundeko, O., Dean, A. P., Davies, H. & Pittman, J. K. (2014). Acclimation of microalgae to wastewater environments involves increased oxidative stress tolerance activity. Plant & Cell Physiology, 55(10), 1848–1857. https://doi.org/10.1093/pcp/pcu113
Publisher
Oxford University Press
Journal
Plant & Cell Physiology
Research Unit
URI
http://hdl.handle.net/10034/622236
DOI
10.1093/pcp/pcu113
PubMed ID
PubMed Central ID
Type
Article
Language
en
Description
This is a pre-copyedited, author-produced PDF of an article accepted for publication in Plant & Cell Physiology following peer review. The version of record Osundeko, O., Dean, A. P., Davies, H. & Pittman, J. K. (2014). Acclimation of microalgae to wastewater environments involves increased oxidative stress tolerance activity. Plant and Cell Physiology, 55(10), 1848–1857, is available online at: https://doi.org/10.1093/pcp/pcu113
Series/Report no.
ISSN
0032-0781
EISSN
1471-9053
ISBN
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https://academic.oup.com/pcp/article/55/10/1848/2756074