Effects of light intensity and photoperiod on pigments production and corresponding key gene expression of Rhodopseudomonas palustris in a photobioreactor system

Liu, Shuli; Kang, Jia; Zhang, Guangming

doi:10.1016/j.biortech.2019.122172

Cited by 31 publications

(13 citation statements)

References 49 publications

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“…In previous studies, similar results have shown that increased light availability increased microalgae productivity up to a certain interval [ 23 , 24 ]. This was also stated by Liu et al [ 14 ], in which he reports that experiments with full light were not favorable, but that an adequate light/dark cycle ratio was better. Appropriate stimulation of the dark can increase the growth of the photosynthetic microorganisms, temporarily altering the intracellular enzymatic reactions.…”

Section: Resultssupporting

confidence: 54%

“…Although some differences have been noted in the results cycles light/dark of long-term considered by Liu et al [ 14 ], the best performance of the process for Chlorella vulgaris was also observed in photo-cycles supported in periods of low darkness (maximum of 4 h). Jacob-Lopes et al [ 13 ] also studied different photoperiods in the cultivation of the cyanobacterium Aphanotece microscopica Nägelli and found that this species managed to maintain high productivity with the same 22:2 h light/dark photo-cycles.…”

Section: Resultsmentioning

confidence: 89%

“…Finally, light conditions such as intensity and photoperiods play irreplaceable roles in the biological metabolic activities of microalgae. Several previous studies reported that, in addition to light intensity, light/dark cycles not only affected the growth of photosynthetic microorganisms but also significantly altered the production of key compounds in microalgae [ 14 , 15 ]. In fact, optimal periods of light allow cells to grow and can make the most of this energy metabolically when available sufficient amounts of light/dark.…”

Section: Introductionmentioning

confidence: 99%

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The Role of Photo-Cycles in the Modulation of Growth and Biochemical Profile of Microalgae: Part I—Food Interest Compounds

Sartori

Vendruscolo

Ribeiro

et al. 2022

Life

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The objective of this work was to evaluate the effect of different photo-cycles on the growth and biochemical profile of Scenedesmus obliquus CPCC05, focusing on food interest compounds. The photo-cycle conditions were separated into three groups: long-term photo-cycles (24:0, 22:2, 20:4, 18:6, 12:12, and 10:14 (h:h)), frequency photo-cycles (2, 4, 8, 12, 24, and 48 times per day (t/d)), and short photo-cycles (0.91:0.09, 0.83:0.17, 0.75:0.25, and 0.50:0.50 (s:s)) of light:dark, respectively. The results showed these microalgae can store enough energy to support cell growth for continuous periods of up to 2 h in the dark, without affecting the productivity of the process. This 2 h, when divided into 2 cycles per day (2 t/d), showed the best growth condition (3700 mg L−1), generation time (14.40 h), and maximum biomass productivity (21.43 mg L h−1). This photo-cycle of 2 t/d was also the best condition for the production of total sterols. However, the values of polyunsaturated fatty acids, lipid content, and amino acids obtained higher yields in the short photo-cycle of 0.75:0.25. Thus, the modulation of light cycles becomes an important tool for boosting and directing the production of target molecules in phototrophic cultures of microalgae.

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Section: Resultssupporting

confidence: 54%

Section: Resultsmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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The Role of Photo-Cycles in the Modulation of Growth and Biochemical Profile of Microalgae: Part I—Food Interest Compounds

Sartori

Vendruscolo

Ribeiro

et al. 2022

Life

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“…A similar profile was discovered for phosphate removal, with the maximum reduction of 76.191% was obtained in the 24L:0D light cycle, while the lowest phosphate removal of 28.171% was obtained in the 06L:18D light cycle. Liu et al (2019) reported that increasing photoperiod enhanced the nitrogen and phosphorus uptake of photosynthetic bacteria. Zhi et al (2019) also showed that the highest nitrogen and phosphorus utilization were observed under continuous illumination.…”

Section: Effect Of Photoperiod On Nitrate and Phosphate Uptakementioning

confidence: 99%

Biomass, pigment production, and nutrient uptake of Chlorella sp. under different photoperiods

et al. 2021

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Abstract. Fakhri M, Riyani E, Ekawati AW, Arifin NB, Yuniarti A, Widyawati Y, Saputra IK, Samuel PD, Arif MZ, Hariati AM. 2021. Biomass, pigment production, and nutrient uptake of Chlorella sp. under different photoperiods. Biodiversitas 22: 5344-5349. Chlorella sp. is well-known as a functional feed in fish culture and has been utilized in the food industry. In phototrophic cultivation, photoperiod plays a fundamental part in the growth and pigment content of microalgae. This work was purposed to evaluate the effect of light:dark cycle on the growth rate, production of biomass and pigment and nutrient utilization of Chlorella sp. Four photoperiods (8:16, 12:12, 18:6, and 24:0 h light:dark regimes) under a constant light intensity of 4500 lux were applied in this study. The results demonstrated that increasing light duration led to increased cell growth, biomass, and pigment production of Chlorella sp. The best cell concentration, specific growth rate, and biomass production were 28.5 x 106 cells mL-1, 1.47 day-1, and 0.815 g L-1 dry weight, respectively, under continuous illumination. The maximum chlorophyll a of 19.205 mg L-1 and carotenoid of 4.656 mg L-1 were obtained at 24:0 h photoperiod. The highest uptake of nitrate (66.331%) and phosphate (76.191%) by Chlorella sp. were achieved under 24 h light regime. Improving the uptake of nutrients resulted in enhanced growth and pigment content of Chlorella sp. We conclude that continuous illumination is the best photoperiod to produce biomass and pigment and improve the nutrient removal of Chlorella sp.

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“…(Li et al., 2019 ; Liu, Guo, et al., 2019 ), Penicillium spp . (Kantifedaki et al., 2018 ; Wang et al., 2011 ), yeasts (Alipour et al., 2017 ), and Rhodopseudomonas palustris (Liu et al., 2019 ). The classic example of pigment‐production microorganisms is Monascus spp .…”

Section: Introductionmentioning

confidence: 99%

Cost‐effective process for the production of Monascus pigments using potato pomace as carbon source by fed‐batch submerged fermentation

Chen

et al. 2021

Food Science & Nutrition

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Effects of light intensity and photoperiod on pigments production and corresponding key gene expression of Rhodopseudomonas palustris in a photobioreactor system

Cited by 31 publications

References 49 publications

The Role of Photo-Cycles in the Modulation of Growth and Biochemical Profile of Microalgae: Part I—Food Interest Compounds

The Role of Photo-Cycles in the Modulation of Growth and Biochemical Profile of Microalgae: Part I—Food Interest Compounds

Biomass, pigment production, and nutrient uptake of Chlorella sp. under different photoperiods

Cost‐effective process for the production of Monascus pigments using potato pomace as carbon source by fed‐batch submerged fermentation

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