Under low irradiation, the light regime modifies growth and metabolite production in various species of microalgae

Guermazi, Wassim; Masmoudi, Salma; Boukhris, Saoussen; Ayadi, Habib; Morant-Manceau, Annick

doi:10.1007/s10811-014-0260-3

Cited by 13 publications

(8 citation statements)

References 79 publications

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“…For instance, it has been recently reported that I . g a l b a n a c u l t u r e d u n d e r l o w l i g h t i n t e n s i t y (27 μmol photons m -2 s -1 ) in an aerated 5 L bubble column exhibited higher levels of proteins, sugars, lipids, and carotenoids (Guermazi et al 2014); although according to our results in Figs. 2 and 3, an even lower light density could provide a greater carotenoid composition.…”

Section: Agitationsupporting

confidence: 78%

Growth kinetics and fucoxanthin production of Phaeodactylum tricornutum and Isochrysis galbana cultures at different light and agitation conditions

2015

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Fucoxanthin is a carotenoid that exerts multiple beneficial effects on human health. However, reports comparing microalgae culture conditions and their effect on growth and fucoxanthin production are still limited. Isochrysis galbana and Phaeodactylum tricornutum cultures in different light (62.0, 25.9, 13.5, or 9.1 μmol photons m -2 s -1 ), mixing conditions (1 vvm aeration or 130 rpm agitation), and media compositions (F/2 and Conway medium) were studied for comparison of cellular growth and fucoxanthin production on F/2 medium. I. galbana showed a better adaptation to tested culture conditions in comparison with P. tricornutum, reaching 2.15 × 10 7 ±4.07×10 6 cells mL -1 and a specific growth rate (μ) of 1.12±0.05 day -1 under aerated conditions and 62.0 μmol photons m -2 s -1 light intensity. Fucoxanthin concentration was about 25 % higher in P. tricornutum cultures under 13.5 μmol photons m -2 s -1 light intensity and aerated conditions, but the highest fucoxanthin total production was higher in I. galbana, where 3.32 mg can be obtained from 1 L batch cultures at the 16th day under these conditions. Moreover, higher cell densities (~32.41 %), fucoxanthin concentration (~42.46 %), and total production (~50.68 %) were observed in I. galbana cultures grown in Conway medium, if compared with cultures grown in F/2 medium. The results show that the best growth conditions did not result in the best fucoxanthin production for either microalgae, implying that there is not a direct relationship between cellular growth and fucoxanthin production. Moreover, the results suggest that I. galbana cultures on Conway medium are strong candidates for fucoxanthin production, where 1.2 to 15 times higher fucoxanthin concentration are observed in comparison to macroalgal sources.

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Section: Agitationsupporting

confidence: 78%

Growth kinetics and fucoxanthin production of Phaeodactylum tricornutum and Isochrysis galbana cultures at different light and agitation conditions

2015

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“…, Guermazi et al. , Alkhamis and Qin ). These approaches offer the possibilities of mass‐producing valuable therapeutic compounds in microalgae.…”

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confidence: 98%

“…, Guermazi et al. ). We have previously demonstrated the high susceptibility of C. minutissima to N variations with trade‐off between biomass and lipid accumulation (Ördög et al.…”

mentioning

confidence: 98%

“…Despite the increasing and extensive research on the biological potential of microalgae, studies on how the growth conditions influence the resultant metabolites and bioactivities are relatively scarce and remain mostly speculative. Given their relatively fast growth rates and high lipid content, Chlorella strains remain popular among researchers (Converti et al 2009, Heredia-Arroyo et al 2010, € Ord€ og et al 2012, Singh et al 2013, Guermazi et al 2014. We have previously demonstrated the high susceptibility of C. minutissima to N variations with trade-off between biomass and lipid accumulation ( € Ord€ og et al 2012).…”

mentioning

confidence: 99%

“…Furthermore, the growth and biochemical composition of different microalgae are highly susceptible to changes in the physical and chemical parameters of the culture medium regardless of the cultivation mode applied (Converti et al 2009, Markou andNerantzis 2013). The significant effects of these factors including the levels of essential macro-elements (e.g., nitrogen = N and phosphate) in the medium, temperature, light regime, and pH of the culture medium, culture time, and the strain type have been highlighted (Rodolfi et al 2009, Brennan and Owende 2010, Mata et al 2010, Stansell et al 2012, Guermazi et al 2014, Alkhamis and Qin 2015. These approaches offer the possibilities of mass-producing valuable therapeutic compounds in microalgae.…”

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confidence: 99%

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Manipulation of nitrogen levels and mode of cultivation are viable methods to improve the lipid, fatty acids, phytochemical content, and bioactivities in Chlorella minutissima

Aremu

Neményi

Stirk

et al. 2015

Journal of Phycology

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The effect of nitrogen (N: low = 2% N or moderate = 10% N) levels and cultivation (photoautotrophic or mixotrophic) modes on the biochemicals in Chlorella minutissima was evaluated using a mass culture system. Moderate N and mixotrophic cultures had higher biomass, protein, carbohydrate content and photosynthetic pigments than the low N and photoautotrophic treatments. In contrast, lipid and fatty acid content of the low N and photoautotrophic treatments were higher than in the moderate N and mixotrophic cultures. More phytochemicals were accumulated in moderate N and mixotrophic cultures which corresponded to better antioxidant capacity in the extracts. The most potent (0.7 mg · mL(-1) ) acetylcholinesterase inhibitory activity was displayed by moderate N and mixotrophic treatment. Approximately 60% of the extracts exhibited a noteworthy antimicrobial activity regardless of the N levels and cultivation modes. Thus, moderate N level enhanced the phytochemicals and biological activities of C. minutissima cultured under a mixotrophic system.

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Energy transfers in a predator–prey context involving D. salina (microalga), F. salina (ciliate) and A. salina (crustacean), living in salterns of Sfax (Tunisia)

Guermazi,

Athmouni,

Annabi-Trabelsi

et al. 2024

Aquat Ecol

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Under low irradiation, the light regime modifies growth and metabolite production in various species of microalgae

Cited by 13 publications

References 79 publications

Growth kinetics and fucoxanthin production of Phaeodactylum tricornutum and Isochrysis galbana cultures at different light and agitation conditions

Growth kinetics and fucoxanthin production of Phaeodactylum tricornutum and Isochrysis galbana cultures at different light and agitation conditions

Manipulation of nitrogen levels and mode of cultivation are viable methods to improve the lipid, fatty acids, phytochemical content, and bioactivities in Chlorella minutissima

Energy transfers in a predator–prey context involving D. salina (microalga), F. salina (ciliate) and A. salina (crustacean), living in salterns of Sfax (Tunisia)

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