Effect of the temperature, pH and irradiance on the photosynthetic activity by Scenedesmus obtusiusculus under nitrogen replete and deplete conditions

Cabello, Juan J.; Toledo-Cervantes, Alma; Sánchez, León; Revah, Sergio; Morales, Marcia

doi:10.1016/j.biortech.2015.01.034

Cited by 69 publications

(36 citation statements)

References 29 publications

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“…This concentration and biomass productivity was about 25% higher than has been reported for another S. obtusiusculus isolate before (Cabello et al, 2014(Cabello et al, , 2015Toledo-Cervantes et al, 2013). In addition, growth (m ¼ 0.22 h À1 ) was more than four times faster than Cabello et al (2015) published in their report. The main results for all fifteen batch processes, with constant varying incident photon flux densities, are listed in Table II.…”

Section: Resultscontrasting

confidence: 51%

“…This was confirmed by the estimation of the theoretical light distribution within the flat‐plate photobioreactor using Schuster's law (results not shown). S. obtusiusculus grows optimally at an incident photon flux density of about 1400 μmol photons m −2 s −1 , which is much higher than determined for other microalgal strains (Cabello et al, ; Huesemann et al, ). At that photon flux density, maximal biomass concentration, space‐time yield and growth rate were obtained for S. obtusiusculus in this study (Fig.…”

Section: Resultsmentioning

confidence: 70%

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Model‐supported phototrophic growth studies with Scenedesmus obtusiusculus in a flat‐plate photobioreactor

Koller

Löwe

Schmid

et al. 2016

Biotech & Bioengineering

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Light-dependent growth of microalgae can vary remarkably depending on the cultivation system and microalgal strain. Cell size and the pigmentation of each strain, as well as reactor geometry have a great impact on absorption and scattering behavior within a photobioreactor. In this study, the light-dependent, cell-specific growth kinetics of a novel green algae isolate, Scenedesmus obtusiusculus, was studied in a LED-illuminated flat-plate photobioreactor on a lab-scale (1.8 L, 0.09 m ). First, pH-controlled batch processes were performed with S. obtusiusculus at different constant incident photon flux densities. The best performance was achieved by illuminating S. obtusiusculus with 1400 μmol photons m s at the surface of the flat-plate photobioreactor, resulting in the highest biomass concentration (4.95 ± 0.16 g L within 3.5 d) and the highest specific growth rate (0.22 h ). The experimental data were used to identify the kinetic parameters of different growth models considering light inhibition for S. obtusiusculus. Light attenuation within the flat-plate photobioreactor was considered by varying light transfer models. Based on the identified kinetic growth model of S. obtusiusculus, an optimum growth rate of 0.22 h was estimated at a mean integral photon flux density of 1072 μmol photons m s with the Beer-Lambert law and 1590 μmol photons m s with Schuster's light transfer model in the flat-plate photobioreactor. LED illumination was, thus, increased to keep the identified optimum mean integral photon flux density constant in the batch process assuming Schuster's light transfer model. Compared to the same constant incident photon flux density (1590 μmol photons m s ), biomass concentration was up to 24% higher using the lighting profile until a dry cell mass concentration of 14.4 ± 1.4 g L was reached. Afterward, the biomass concentration remained constant, whereas cell growth continued in the batch process with constant incident photon flux density. Finally, biomass concentration was 15.5 ± 1.5 g L and, thus, 7% higher compared to the corresponding batch process with lighting profile. Biotechnol. Bioeng. 2017;114: 308-320. © 2016 Wiley Periodicals, Inc.

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Section: Resultscontrasting

confidence: 51%

Section: Resultsmentioning

confidence: 70%

Model‐supported phototrophic growth studies with Scenedesmus obtusiusculus in a flat‐plate photobioreactor

Koller

Löwe

Schmid

et al. 2016

Biotech & Bioengineering

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“…On the other hand, the pH in S. almeriensis biosorption experiments experienced a remarkable initial increase up to pH 8 at 3 h regardless of the OM concentrations. This fast change in medium pH can be related to the high physiological activity associated to the phototrophic metabolism under this experimental condition(Cabello et al, 2015). From 24 h onwards, pH values increased slightly at high OM concentrations (i.e.…”

mentioning

confidence: 74%

Influence of organic matter and CO2 supply on bioremediation of heavy metals by Chlorella vulgaris and Scenedesmus almeriensis in a multimetallic matrix

Saavedra

Muñoz

Taboada

et al. 2019

Ecotoxicology and Environmental Safety

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This research evaluated the influence of organic matter (OM) and CO2 addition on the bioremediation potential of two microalgae typically used for wastewater treatment: Chlorella vulgaris (CV) and Scenedesmus almeriensis (SA). The heavy metal (HM) removal efficiencies and biosorption capacities of both microalgae were determined in multimetallic solutions (As, B, Cu, Mn, and Zn) mimicking the highest pollutant conditions found in the Loa river (Northern Chile). The presence of OM decreased the total biosorption capacity, specially in As (from 2.2 to 0.0 mg/g for CV and from 2.3 to 1.7 mg/g for SA) and Cu (from 3.2 to 2.3 mg/g for CV and from 2.1 to 1.6 mg/g for SA), but its influence declined over time. CO2 addition decreased the total HM biosorption capacity for both microalgae species and inhibited CV growth. Finally, metal recovery using different eluents (HCl, NaOH, and CaCl2) was evaluated at two different concentrations. HCl 0.1 M provided the highest recovery efficiencies, which supported values over 85% of As, 92% of Cu, and ≈ 100% of Mn and Zn from SA. The presence of OM during the loaded stage resulted in a complete recovery of As, Cu, Mn, and Zn when using HCl 0.1 M as eluent.

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“…The photosynthetic activity (PA) was obtained by measuring the change in dissolved oxygen (DO) concentration in different temperature conditions, and calculated by Eq (1) where, C b is the biomass concentration and O 2 is the DO concentration49.…”

Section: Methodsmentioning

confidence: 99%

Genome-wide transcriptome analysis revealed organelle specific responses to temperature variations in algae

Shin

Hong

Yoo

et al. 2016

Sci Rep

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Temperature is a critical environmental factor that affects microalgal growth. However, microalgal coping mechanisms for temperature variations are unclear. Here, we determined changes in transcriptome, total carbohydrate, total fatty acid methyl ester, and fatty acid composition of Tetraselmis sp. KCTC12432BP, a strain with a broad temperature tolerance range, to elucidate the tolerance mechanisms in response to large temperature variations. Owing to unavailability of genome sequence information, de novo transcriptome assembly coupled with BLAST analysis was performed using strand specific RNA-seq data. This resulted in 26,245 protein-coding transcripts, of which 83.7% could be annotated to putative functions. We identified more than 681 genes differentially expressed, suggesting an organelle-specific response to temperature variation. Among these, the genes related to the photosynthetic electron transfer chain, which are localized in the plastid thylakoid membrane, were upregulated at low temperature. However, the transcripts related to the electron transport chain and biosynthesis of phosphatidylethanolamine localized in mitochondria were upregulated at high temperature. These results show that the low energy uptake by repressed photosynthesis under low and high temperature conditions is compensated by different mechanisms, including photosystem I and mitochondrial oxidative phosphorylation, respectively. This study illustrates that microalgae tolerate different temperature conditions through organelle specific mechanisms.

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Effect of the temperature, pH and irradiance on the photosynthetic activity by Scenedesmus obtusiusculus under nitrogen replete and deplete conditions

Cited by 69 publications

References 29 publications

Model‐supported phototrophic growth studies with Scenedesmus obtusiusculus in a flat‐plate photobioreactor

Model‐supported phototrophic growth studies with Scenedesmus obtusiusculus in a flat‐plate photobioreactor

Influence of organic matter and CO2 supply on bioremediation of heavy metals by Chlorella vulgaris and Scenedesmus almeriensis in a multimetallic matrix

Genome-wide transcriptome analysis revealed organelle specific responses to temperature variations in algae

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