Comparison of N and P requirements of Isochrysis galbana under phototrophic and mixotrophic conditions

Alkhamis, Yousef Ahmed; Qin, Jianguang

doi:10.1007/s10811-014-0501-5

Cited by 17 publications

(19 citation statements)

References 36 publications

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“…). For example, cell abundance in all mixotrophic cultures of I. galbana was higher than in the photoautotrophic cultures regardless of N source (Alkhamis and Qin ). With respect to biomass accumulation, mixotrophic cultivation of microalgae generally has the benefit of improved growth rates, shorten growth cycles, reduce biomass loss in dark hours due to mitochondrial respiration and increase biomass productivity (Wang et al.…”

Section: Discussionmentioning

confidence: 90%

“…, Wang et al. , Alkhamis and Qin ), the current study was conducted using a mass culture system. Both N level and cultivation mode had a significant effect on biomass accumulation, macromolecule content, and photosynthetic pigments in C. minutissima .…”

Section: Discussionmentioning

confidence: 99%

“…In contrast to majority of the previous studies whereby small batch cultures (flasks) are often used (Heredia-Arroyo et al 2010, Wang et al 2014, Alkhamis and Qin 2015, the current study was conducted using a mass culture system. Both N level and cultivation mode had a significant effect on biomass accumulation, macromolecule content, and photosynthetic pigments in C. minutissima.…”

Section: Discussionmentioning

confidence: 99%

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

mentioning

confidence: 98%

“…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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Section: Discussionmentioning

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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

mentioning

confidence: 98%

mentioning

confidence: 99%

See 3 more Smart Citations

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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Investigation of biomass production and harvesting of Isochrysis sp. using experimental design methodologies

Lee

Chen

2021

J of Chemical Tech & Biotech

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BACKGROUND Microalgal biodiesel is one of the best promising candidates as an alternative liquid fuel in response to the energy crisis. The timely development of cost‐effective and environmentally friendly culture systems for enhancing microalgae production on a commercial scale is extremely important. In this study, the effects of the process variables temperature, LED light source (blue, white, red), light intensity and aeration rate on biomass production, and the effects of the renewal rate and cycle time on the culture harvest of the marine microalga Isochrysis sp. were investigated using Box–Behnken design (BBD) and central composite design (CCD), respectively. RESULTS The biomass productivity and lipid content of Isochrysis sp. significantly depended on temperature. Maximum biomass productivity was achieved under white LED light. The optimal conditions for biomass production of Isochrysis sp. with economic cost and energy consumption were a culture temperature of 35 °C, white LED illumination, light intensity 182 μmol m−2 s−1 and an aeration rate of 1.0 L L−1 min−1. A medium renewal rate of 30% and a culture harvest cycle time of three days resulted in the highest biomass productivity for Isochrysis sp. The respective biomass productivities predicted by the models were in good agreement with the results obtained in photobioreactor experiments. CONCLUSION Major factors remarkably influenced the culture conditions and biomass harvesting. The results can offer a promising roadmap for the cost‐effective production of biodiesel using Isochrysis sp. © 2021 Society of Chemical Industry

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Response to salinity and temperature changes in the alien Asian copepod Pseudodiaptomus marinus introduced in the Black Sea

et al. 2019

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The salinity tolerance and the effect of temperature were studied on the behavior and motor activity of the nonindigenous Indo‐Pacific calanoid copepod Pseudodiaptomus marinus, first found in Sevastopol Bay (Black Sea) in autumn 2016. According to the index of median lethal salinity (LS50), the salinity tolerance range of adult P. marinus collected at 18.0 psu in November 2016 and subsequently reared in the laboratory amounted to 5.0–44.0 psu, independently of the acclimation regime. Females of P. marinus collected in December 2016 at 12.0°C became torpid at 8.0°C, a value typical of winter–spring Black Sea coastal areas. An increase in temperature from 8.0°C to 27.0°C led to an increase in the beat frequency of mouth appendages, swimming speed, and time spent cruising. However, at the same high temperature, the mean cruising speed in the feeding‐current feeder P. marinus was 2‐fold lower than that of the native, similarly sized cruise feeder Pseudocalanus elongatus. On the contrary, mouthpart beat frequency while cruising was 2‐fold higher reaching 80 Hz, due to the creation of feeding currents in P. marinus. The results of our experiments confirm the euryhaline character of P. marinus, and point to an apparent ability to survive cold temperatures in a torpid state. This suggests the possibility of entering an overwintering stage to survive the adverse cold winter–spring environmental conditions of the Black Sea, similarly to the recent thermophilic Indo‐Pacific invader Oithona davisae which established a successful population in the same area.

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Comparison of N and P requirements of Isochrysis galbana under phototrophic and mixotrophic conditions

Cited by 17 publications

References 36 publications

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

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

Investigation of biomass production and harvesting of Isochrysis sp. using experimental design methodologies

Response to salinity and temperature changes in the alien Asian copepod Pseudodiaptomus marinus introduced in the Black Sea

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