Effect of Monochromatic Light Emitting Diode on the Growth of Four Microalgae Species (Chlorella vulgaris, Nitzschia sp., Phaeodactylum

Oh, Seok-Jin; Kwon, Hyeong-Kyu; Jeon, Jin-Young; Yang, Han-Seob

doi:10.7837/kosomes.2015.21.1.001

Cited by 10 publications

(3 citation statements)

References 29 publications

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“…Hence, it is more likely to cause photo-inhibition. However, various studies demonstrate that blue color is very effective and promotes higher biomass production in other microalgal species [19,24,31]. The diverse results on the literature reflect that the effectiveness of light wavelength on biomass production could be species dependent.…”

Section: Mixotrophic Conditionsmentioning

confidence: 99%

Effects of Monochromatic Illumination with LEDs Lights on the Growth and Photosynthetic Performance of Auxenochlorella protothecoides in Photo- and Mixotrophic Conditions

Μάρκου

Diamantis

Korozi

et al. 2021

Plants

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This study examined the effects of monochromatic illumination (blue, red, green and yellow) employing light-emitting diodes (LEDs), trophic conditions (photoautotrophic and mixotrophic), and nitrogen availability (high and low peptone concentration) on the growth and biochemical composition of Auxenochlorella protothecoides. The results revealed that mixotrophic conditions did not favor A. protothecoides, giving lower growth rates compared to heterotrophy (dark conditions). However, mixotrophy gave significantly higher growth rates compared to photoautotrophy. The best light wavelengths for mixotrophic cultivation were that of white and red. In all cases investigated in this study, high peptone concentration (4 g/L) resulted in decreased growth rates. Regarding the biochemical composition of A. protothecoides, the strongest effect, irrespective of trophic conditions, was caused by nitrogen availability (peptone concentration). Specifically, at nitrogen replete conditions (4 g/L peptone), biomass was rich in proteins (32–67%), whereas under deplete conditions (0.5 g/L peptone), A. protothecoides accumulated mainly carbohydrates (up to 56%). Mixotrophic conditions generally favored higher carbohydrate content, whereas photoautotrophic conditions favored higher protein content. The different illumination spectra did not have any clear effect on the biochemical composition (metabolites content), except that, in all trophic conditions, the use of the green spectrum resulted in higher chlorophyll b content. Chlorophyll a fluorescence studies revealed that the trophic conditions and the high peptone concentrations impacted the photosystem II (PSII) performance, and also affected plastoquinone re-oxidation kinetics and the heterogeneity of the PSII reaction centers.

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Section: Mixotrophic Conditionsmentioning

confidence: 99%

Effects of Monochromatic Illumination with LEDs Lights on the Growth and Photosynthetic Performance of Auxenochlorella protothecoides in Photo- and Mixotrophic Conditions

Μάρκου

Diamantis

Korozi

et al. 2021

Plants

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“…As a light source, a fluorescent lamp with multiple wavelengths, a red light (650 nm), a yellow light (590 nm), and a blue light (450 nm) were used. The microalgae were grown to a late stage of the logarithmic growth phase under a cool-white fluorescent lamp (12L: 12D) at 20 o C, 30 psu and then inoculated to a final density of cells with about 1.0 × 10 2 in f/2 medium 3L [20]. For each condition, two bottles were used.…”

Section: Culturementioning

confidence: 99%

Assessment of the Dynamics of Microbial Community Associated with Tetraselmis suecica Culture under Different LED Lights Using Next-Generation Sequencing

Yang¹,

Kim²,

Choi³

et al. 2019

Journal of Microbiology and Biotechnology

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Tetraselmis is a green algal genus, some of whose species are important in aquaculture as well as biotechnology. In algal culture, fluorescent lamps, traditional light source for culturing algae, are now being replaced by a cost-effective light-emitting diodes (LEDs). In this study, we investigated the effect of LED light of different wavelengths (white, red, yellow, and blue) on the growth of Tetraselmis suecica and its associated microbial community structures using the next-generation sequencing (NGS). The fastest growth rate of T. suecica was shown in the red light, whereas the slowest was in yellow. The highest OTUs (3426) were identified on day 0, whereas the lowest ones (308) were found on day 15 under red light. The top 100 OTUs associated with day 0 and day 5 cultures of T. suecica under the red and yellow LED were compared. Only 26 OTUs were commonly identified among four samples. The highest numbers of unique OTUs were identified at day 0, indicating the high degree of initial microbial diversity of the T. suecica inoculum. The red light-unique OTUs occupied 34.98%, whereas the yellow-specific OTUs accounted for only 2.2%. This result suggested a higher degree of interaction in T. suecica culture under the red light, where stronger photosynthesis occurs. Apparently, the microbial community associated with T. suecica related to the oxygen produced by algal photosynthesis. This result may expand our knowledge about the algaebacteria consortia, which would be useful for various biotechnological applications including wastewater treatment, bioremediation, and sustainable aquaculture.

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“…그러나 같은 특정영양 염 결핍 조건에서도 미세조류 종에 따라 세포 성장 및 유용 산물의 생산에 미치는 영향이 다양하게 나타날 수 있다 [13,14]. 또한 해양 미세조류 배양에서와는 달리 담수 유래 미 세조류 배양에서 염도 (salinity)는 주된 스트레스 인자로 적 용될 수 있는 가능성이 확인되었으며 [15], 광합성을 하는 미 세조류의 경우 광도 및 광파장에 따라 미세조류 성장 및 유용 산물 생산에 영향을 미칠 수 있다 [16][17][18]…”

Section: Introductionunclassified

Enhanced Production of Lutein by Indigenous Freshwater Microalga, Mychonastes pushpae Using Various Abiotic Stresses

Kim,

Yim,

Jang

et al. 2023

KSBB

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Microalgae have been known as superior producers of valuable carotenoids via their defensive mechanism against environmental changes. In this study, nitrogen and phosphorus starvation (NPS), high light intensity (HL), and high salinity (HS) stress culture conditions were subjected to indigenous freshwater microalga, Mychonastes pushpae culture to investigate gene expression levels of phytoene synthase (PSY), phytoene desaturase (PDS), and zeta-carotene desaturase (ZDS) involved in carotenoid biosynthesis as well as to enhance lutein productivity. For this, the microalgal cells were cultivated in 0.5 L bubble column photobioreactors under the stress conditions. Based on the third day of culture, the lutein content of M. pushpae cultured under the NPS condition was 4.4 times higher than the control. The transcription level of PSY in M. pushpae under NPS and HL stress conditions significantly increased more than 100-fold compared to those in non-stress conditions. The expression levels of PDS and ZDS of M. pushpae increased under the culture condition with NPS, NPS & HL and NPS & HS stress compared to the control. From the results, subjecting only NPS stress to M. pushpae culture was the most effective stress for lutein production in terms of lutein productivity and carotenoid gene expression

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Effect of Monochromatic Light Emitting Diode on the Growth of Four Microalgae Species (Chlorella vulgaris, Nitzschia sp., Phaeodactylum

Cited by 10 publications

References 29 publications

Effects of Monochromatic Illumination with LEDs Lights on the Growth and Photosynthetic Performance of Auxenochlorella protothecoides in Photo- and Mixotrophic Conditions

Effects of Monochromatic Illumination with LEDs Lights on the Growth and Photosynthetic Performance of Auxenochlorella protothecoides in Photo- and Mixotrophic Conditions

Assessment of the Dynamics of Microbial Community Associated with Tetraselmis suecica Culture under Different LED Lights Using Next-Generation Sequencing

Enhanced Production of Lutein by Indigenous Freshwater Microalga, Mychonastes pushpae Using Various Abiotic Stresses

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