Influence of phosphorus concentration and temperature on growth and phosphorus uptake by the microalga Scenedesmus obliquus

Martínez, Manuel Villanueva; Jiménez, José María López; Yousfi, Farida El

doi:10.1016/s0960-8524(98)00120-5

Cited by 141 publications

(55 citation statements)

References 11 publications

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“…Although there has still been a little information on the growth superiority of S. quadricauda to M. aeruginosa according to the decrease in phosphorus in Lake Tega, the superiority would be supported by the outcomes of our competition experiment (Fig. 2(a)) as well as other studies (Nakahara, 1993;Martínez et al, 1999).…”

Section: Discussionsupporting

confidence: 79%

“…From these values, it was suggested that M. aeruginosa used in this study would possess higher affinity for phosphorus compared to that obtained in other studies. On the other hand, the μ max values of S. quadricauda and S. obliquus have been reported by Di Toro et al (1971) and Martínez et al (1999), respectively, indicating that the values were relatively higher (0.85 -2.02 day -1 ) than that obtained in this study. These differences might be attributed to the differences in strain used and the culture conditions such as temperature and light intensity.…”

Section: Discussioncontrasting

confidence: 59%

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Mechanisms of Algal Species Dominance among Cyanobacteria, Diatoms and Green Algae as a Consequence of Phosphorus Reduction Caused by River Water Dilution in Eutrophic Lake

Amano

Machida

2013

J. of Wat. ^|^ Envir. Tech.

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This study examined the mechanisms of dominant species transition from Microcystis aeruginosa to mainly Cyclotella sp. and also Scenedesmus quadricauda as a consequence of phosphorus reduction caused by dilution in Lake Tega. The growth potentials and competitive abilities for each species were investigated through a series of culture experiments and the effect of phosphorus fluctuation on the species transition was discussed. The monoculture experiment for each species showed that S. quadricauda possessed the growth superiorities compared to other species under phosphorus-limited condition, representing the highest maximum growth rate (0.32 day -1 ) and the highest Chl.a division ability (5.6 times) in phosphorus-free condition. The competitive experiment culturing all species together in the same medium indicated that the condition at PO 4 -P = 0.5 mg/L led to the predominance of M. aeruginosa, reflecting the condition before dilution. On the other hand, at PO 4 -P = 0.1 mg/L, which represented the condition after dilution, S. quadricauda completely dominated and the predominance of Cyclotella sp. was never observed. Accordingly, it could be concluded that the predominance of Cyclotella sp. was affected by the dilution in Lake Tega and would be attributed not to phosphorus reduction but other factors such as nitrogen, light intensity, dilution rate and/or their interaction.

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Section: Discussionsupporting

confidence: 79%

Section: Discussioncontrasting

confidence: 59%

Mechanisms of Algal Species Dominance among Cyanobacteria, Diatoms and Green Algae as a Consequence of Phosphorus Reduction Caused by River Water Dilution in Eutrophic Lake

Amano

Machida

2013

J. of Wat. ^|^ Envir. Tech.

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“…The pH and temperature were set according to a factorial plan, based on reported ranges in earlier successful studies 19 ; it involved 3Â3 ¼ 9 points in total, corresponding to all possible combinations of three pH values (i.e., 6, 7, and 8) and three temperatures (i.e., 20, 25, and 30 C), as apparent in Table 1, which was included to facilitate referencing to the experimental runs throughout the remainder of the text. This plan aimed at drawing, under appropriate assumptions, valid statistical inferences about relevant effects and combinations thereof, via an optimal utilization of available laboratory resources.…”

Section: Batch Experimentsmentioning

confidence: 99%

Effects of temperature and pH on growth and antioxidant content of the microalga Scenedesmus obliquus

Guedes

Amaro²,

Pereira

et al. 2011

Biotechnology Progress

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Reactive forms of oxygen can damage DNA (among other molecules), thus triggering, e.g., atherogenesis and carcinogenesis. However, such dietary antioxidants as lutein and β-carotene can effectively inactivate them; these compounds were found to high levels in a novel strain (M2-1) of the microalga Scenedesmus obliquus. The independent and combined effects of pH and temperature on its rates of growth and production of antioxidants were experimentally assessed, via a full factorial experimental design; the effects of each parameter independently, and of their interactions were accordingly quantified by ANOVA. Our results indicated that temperature plays a more important role on the maximum specific growth rate than pH; in terms of antioxidant content, pH and, to a lesser extent, temperature also have relevant effects. Consequently, the highest rate of biomass specific growth (0.294 ± 0.013 day(-1)) and biomass productivity (0.837 ± 0.054 mg L(-1) day(-1)) were associated with relatively low pH (6) and relatively high temperature (30°C). Conversely, the antioxidant production rate increased with pH; hence, the highest productivity (0.638 mg L(-1) day(-1)) was attained at pH 8 and 30°C. At the best operating conditions for antioxidant content, the levels of lutein and β-carotene were 203.57 ± 1.41 and 18.20 ± 0.33 mg mL(-1), respectively; the maximum production of either one occurred at the early exponential phase.

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“…It is a constituent element of DNA, RNA, adenosine triphosphate (ATP), cell membrane materials, etc. ATP is essential to the cellular processes related to photosynthesis (e.g., photophosphorylation) and other energetic metabolisms (Gauthier and Turpin, 1997;Martinez et al, 1999), which are critical for cell growth and lipid production of microalgae. Phosphorus is preferentially assimilated as inorganic phosphates in the form of H 2 PO − 4 and HPO 2− 4 , which could serve as the buffering agents for pH control as well.…”

Section: Factor Selection and Groupingmentioning

confidence: 99%

Optimising the lipid production of the green alga Neochloris oleoabundans using box–behnken experimental design

Wang

Lan

2011

Can J Chem Eng

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A systematic approach involving factor grouping, factorial design and response surface analysis was demonstrated to be an effective method for studying the effects of a large number of nutrients on cell growth and lipid production of the green alga Neochloris oleoabundans for the purpose of medium optimisation. Box-Behnken experimental design (BBD) was used for factorial experimental design and response surface method (RSM) was used for data analysis. The optimised medium obtained was able to support a lipid yield of 641.4 mg lipid/L and a cell density of 2.54 g/L, which were 4.5-and 2.2-fold of that obtained with the basic medium, modified Bristol medium (MBM), respectively.Une approche systématique impliquant un groupement de facteur, un plan factoriel et une analyse de surface de réponse s'est démontréeêtre une méthode efficace pour l'étude des effets d'un grand nombre d'éléments nutritifs sur la croissance cellulaire et la production de lipides de l'algue verte Neochloris oleoabundans, aux fins d'optimisation des milieux de culture. Le concept expérimental Box-Behnken (BBD) aété utilisé pour le plan expérimental factoriel et la méthode de surface de réponse (RSM) aété utilisée pour l'analyse des données. Le milieu optimisé obtenu aété en mesure de soutenir une production de lipides de 641,4 mg de lipides/L et une densité cellulaire de 2,54 g/L, ce qui représente des valeurs 4,5 fois et 2,2 fois supérieuresà celles obtenues avec le milieu de base, le milieu Bristol modifié (MBM), respectivement.

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Influence of phosphorus concentration and temperature on growth and phosphorus uptake by the microalga Scenedesmus obliquus

Cited by 141 publications

References 11 publications

Mechanisms of Algal Species Dominance among Cyanobacteria, Diatoms and Green Algae as a Consequence of Phosphorus Reduction Caused by River Water Dilution in Eutrophic Lake

Mechanisms of Algal Species Dominance among Cyanobacteria, Diatoms and Green Algae as a Consequence of Phosphorus Reduction Caused by River Water Dilution in Eutrophic Lake

Effects of temperature and pH on growth and antioxidant content of the microalga Scenedesmus obliquus

Optimising the lipid production of the green alga Neochloris oleoabundans using box–behnken experimental design

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