Effects of Light Intensity, Salinity and Temperature on Growth in Camalti Strain of Dunaliella viridis Teodoresco from Turkey

Ak, İlknur; Cırık, Semra; Göksan, Tolga

doi:10.3923/jbs.2008.1356.1359

Cited by 25 publications

(6 citation statements)

References 15 publications

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“…This behavior is consistent with numerous studies demonstrated that under N-limited conditions, lipid and carbohydrate contents were improved in many algal species like Neochloris oleoabundan [32] HK-129, Thermosynechococcus sp, Chlorella vulgaris [33], Scenedesmus obliquus CNW-N [34], Nannochloropsis sp., and Tetraselmis suecica [35] .Under supra-optimum PAR, I. galbana similarly to other photosynthetic organisms showed an acclimation response by decreasing the Chl a content and accumulating carotenoids. Previous studies observed that under high light intensities to reduce the light harvesting ability chlorophyll a content decreases and carotenoids accumulates to prevent the absorption of surplus light energy by the photosynthetic machinery and thereby protect the photosynthetic apparatus from oxidative stress [36,37].…”

Section: Biochemical Compositions and Pigmentsmentioning

confidence: 99%

Influence of High Light Intensity and Nitrate Deprivation on Growth and Biochemical Composition of the Marine Microalgae Isochrysis galbana

Mishra

Prasad

2019

Braz. arch. biol. technol.

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Isochrysis galbana is a brown microalgae widely used as a feed for marine organism in aquaculture. The aim of present study is to investigate the growth, biochemical composition, fatty acid profile, photosynthetic parameters and antioxidant activity (radical scavenging activity) of Isochrysis galbana cells cultivated under different levels (sub-optimum; 50 ± 1.5,optimum; 125 ± 2.5 and supra-optimum; 325 ± 3.5 µmol photons m-2 s -1) of photosynthetic active radiation (PAR), and subsequently treated with different concentration of nitrate deprivation (8mM, 2mM and 0.5mM). The experiment was carried out under controlled conditions utilizing a factorial design 3x3 (light intensity and nitrate concentration). The result depicts that PAR positively influences the growth of Isochrysis galbana which is maximum under supra-optimum PAR. Nitrate deprivation (2mM & 0.5mM) induced decline in growth in terms of dry weight is observed as 60.1% & 61.9% in suboptimum and 26.5% and 34.9% in supra-HIGHLIGHTS Mishra, N.; et al.

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Section: Biochemical Compositions and Pigmentsmentioning

confidence: 99%

Influence of High Light Intensity and Nitrate Deprivation on Growth and Biochemical Composition of the Marine Microalgae Isochrysis galbana

Mishra

Prasad

2019

Braz. arch. biol. technol.

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“…The dynamic simulation revealed that high light intensity leads to a decrease in chlorophyll content. This response has been reported in the literature and is believed to be a protec-tive mechanism to prevent the absorption of excess light energy by the photosynthetic machinery [86,87].…”

Section: Dynamics Simulationmentioning

confidence: 62%

Dynamical Simulation, Sensitivity, and Productivity Analysis of a Light-Photoacclimation Model for Microalgae-Based Carbohydrate Production in Continuous Photobioreactors

et al. 2023

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The world’s human population is increasing as is the demand for new sustainable sources of energy. Accordingly, microalgae-based carbohydrates for biofuel production are being considered as an alternative source of raw materials for producing biofuels. Microalgae grow in photobioreactors under constantly changing conditions. Models improve our understanding of microalgae growth. In this paper, a photoacclimated model for continuous microalgae cultures in photobioreactors was used to study the time-varying behavior and sensitivity of solutions under optimal productivity conditions. From the perspective of dynamic simulation in this work, light intensity was found to play an influential role in modifying metabolic pathways as a cell stressor. Enhancing carbohydrate productivity by combining nutritional deficiency and light intensity regulation modeling strategies could be helpful to optimize the process for the highest yield in large-scale cultivation systems. Under the proposed simulation conditions, a maximum carbohydrate productivity of 48.11 gCm−3d−1 was achieved using an optimal dilution rate of 0.2625 d−1 and 350 μmolm−2s−1 of light intensity. However, it is important to note that, a particular set of manipulated inputs can generate multiple outputs at a steady state. A numerical solution of the sensitivity functions indicated that the model outputs were especially sensitive to changes in parameters corresponding to a minimum nitrogen quota, maximum nitrogen intake rate, dilution rate, and maximum nitrogen quota compared to to other model parameters.

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“…The influence of white or colored light on growth and pigment content in the genus Dunaliella is rather limited [93][94][95][96][97][98][99] without a certain pattern of response of this genus in general to the various light regimes studied so far. In the present study, two white light intensities were used, low light (L) of 2000 lux (40 µmol photons m −2 s −1 ) and high light (XL) of 8000 lux (160 µmol photons m −2 s −1 ).…”

Section: Discussionmentioning

confidence: 99%

Quantity and Quality of Light on Growth and Pigment Content of Dunaliella sp. and Anabaena sp. Cultures and the Use of Their Absorption Spectra as a Proxy Method for Assessment

Hotos

2023

JMSE

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(1) Background: As microalgae cultures are affected by the quantity and quality of light, I explored this for two species. Additionally, I introduced a novel easy and economical way for the growers to easily and economically ascertain continuously with satisfactory accuracy the quantitative and qualitative status of their culture using absorption spectra. (2) Methods: The locally isolated chlorophyte Dunaliella sp. and the cyanobacterium Anabaena sp. were cultured in small volumes with two intensities of white light (2000 and 8000 lux) and with green, blue and red light, and the increase in their biomass and pigments was studied. Pigment analyses, continuous recordings of absorption spectra and calibration curves were used. (3) Results: The intensity of 8000 lux of white light yielded the highest increase in biomass, chlorophylls and carotenoids in Dunaliella sp., and the same was found for green and blue light, while 2000 lux and green light caused the greatest increase in biomass and phycocyanin in Anabaena sp. From the absorption spectra, the evolution of the pigment content can be estimated, and both pigments and biomass are correlated very strongly with those extracted from the spectra absorption of 750 nm. (4) Conclusions: The use of absorption spectra as an easy, fast and economical method can be a useful tool for a good approximation of the state of the microalgae culture. This is clearly shown when the spectra of the cultures under different light intensities and colors are compared having a catalytic effect on the level of the pigments leading to the increase in carotenoids and phycocyanin of the green light.

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Effects of Light Intensity, Salinity and Temperature on Growth in Camalti Strain of Dunaliella viridis Teodoresco from Turkey

Cited by 25 publications

References 15 publications

Influence of High Light Intensity and Nitrate Deprivation on Growth and Biochemical Composition of the Marine Microalgae Isochrysis galbana

Influence of High Light Intensity and Nitrate Deprivation on Growth and Biochemical Composition of the Marine Microalgae Isochrysis galbana

Dynamical Simulation, Sensitivity, and Productivity Analysis of a Light-Photoacclimation Model for Microalgae-Based Carbohydrate Production in Continuous Photobioreactors

Quantity and Quality of Light on Growth and Pigment Content of Dunaliella sp. and Anabaena sp. Cultures and the Use of Their Absorption Spectra as a Proxy Method for Assessment

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