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dc.contributor.authorBhola, Virthie Kemraj-
dc.contributor.authorSwalaha, Feroz Mahomed-
dc.contributor.authorNasr, Mahmoud-
dc.contributor.authorKumari, Sheena K.-
dc.contributor.authorBux, Faizal-
dc.identifier.citationBhola, V.K. et al. 2016. Physiological responses of carbon-sequestering microalgae to elevated carbon regimes. European Journal of Phycology. 51(4): 1-12.en_US
dc.description.abstractIn order to identify a high carbon-sequestering microalgal strain, the physiological effect of different concentrations of carbon sources on microalgae growth was investigated. Five indigenous strains (I-1, I-2, I-3, I-4 and I-5) and a reference strain (I-0: Coccolithus pelagicus 913/3) were subjected to CO2 concentrations of 0.03–15% and NaHCO3 of 0.05–2 g CO2 l–1. The logistic model was applied for data fitting, as well as for estimation of the maximum growth rate (μmax) and the biomass carrying capacity (Bmax). Amongst the five indigenous strains, I-3 was similar to the reference strain with regards to biomass production values. The Bmax of I-3 significantly increased from 214 to 828 mg l–1 when CO2 concentration was increased from 0.03 to 15% (r = 0.955, P = 0.012). Additionally, the Bmax of I-3 increased with increasing NaHCO3 (r = 0.885, P = 0.046) and was recorded at 153 mg l–1 (at 0.05 g CO2 l–1) and 774 mg l–1 at (2 g CO2 l–1). Relative electron transport rate (rETR) and maximum quantum yield (Fv/Fm) were also applied to assess the impact of elevated carbon sources on the microalgal cells at the physiological level. Isolate I-3 displayed the highest rETR confirming its tolerance to higher quantities of carbon. Additionally, the decline in Fv/Fm with increasing carbon was similar for strains I-3 and the reference strain. Based on partial 28s ribosomal RNA gene sequencing, strain I-3 was homologous to the ribosomal genes of Chlorella sp.en_US
dc.format.extent12 pen_US
dc.publisherTaylor and Fancis Onlineen_US
dc.relation.ispartofEuropean journal of phycology (Print)-
dc.subjectCo2 fixationen_US
dc.subjectCO2 toleranceen_US
dc.subjectLogistic modelen_US
dc.subjectMicroalgal isolationen_US
dc.subjectNaHCO3 toleranceen_US
dc.subjectPhysiological stressen_US
dc.titlePhysiological responses of carbon-sequestering microalgae to elevated carbon regimesen_US
dc.description.availabilityCopyright: 2016. Taylor & Francis Online. Due to copyright restrictions, only the abstract is available. For access to the full text item, please consult the publisher's website. The definitive version of the work is published in European Journal of Phycology, Vol 51, Issue 4. 12Pg.
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Appears in Collections:Research Publications (Applied Sciences)
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