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Influence of spectral intensity and quality of LED lighting on photoacclimation, carbon allocation and high-value pigments in microalgae.
- Source :
-
Photosynthesis research [Photosynth Res] 2020 Jan; Vol. 143 (1), pp. 67-80. Date of Electronic Publication: 2019 Nov 08. - Publication Year :
- 2020
-
Abstract
- Tailoring spectral quality during microalgal cultivation can provide a means to increase productivity and enhance biomass composition for downstream biorefinery. Five microalgae strains from three distinct lineages were cultivated under varying spectral intensities and qualities to establish their effects on pigments and carbon allocation. Light intensity significantly impacted pigment yields and carbon allocation in all strains, while the effects of spectral quality were mostly species-specific. High light conditions induced chlorophyll photoacclimation and resulted in an increase in xanthophyll cycle pigments in three of the five strains. High-intensity blue LEDs increased zeaxanthin tenfold in Rhodella sp. APOT&#95;15 relative to medium or low light conditions. White light however was optimal for phycobiliprotein content (11.2 mg mL <superscript>-1</superscript> ) for all tested light intensities in this strain. The highest xanthophyll pigment yields for the Chlorophyceae were associated with medium-intensity blue and green lights for Brachiomonas submarina APSW&#95;11 (5.6 mg g <superscript>-1</superscript> lutein and 2.0 mg g <superscript>-1</superscript> zeaxanthin) and Kirchneriella aperta DMGFW&#95;21 (1.5 mg g <superscript>-1</superscript> lutein and 1 mg g <superscript>-1</superscript> zeaxanthin), respectively. The highest fucoxanthin content in both Heterokontophyceae strains (2.0 mg g <superscript>-1</superscript> ) was associated with medium and high white light for Stauroneis sp. LACW&#95;24 and Phaeothamnion sp. LACW&#95;34, respectively. This research provides insights into the application of LEDs to influence microalgal physiology, highlighting the roles of low light on lipid metabolism in Rhodella sp. APOT&#95;15, of blue and green lights for carotenogenesis in Chlorophyceae and red light-induced photoacclimation in diatoms.
- Subjects :
- Chlorophyceae metabolism
Chlorophyll A metabolism
Microalgae growth & development
Phycobiliproteins metabolism
Rhodophyta growth & development
Rhodophyta metabolism
Spectroscopy, Fourier Transform Infrared
Acclimatization radiation effects
Carbon metabolism
Light
Microalgae metabolism
Microalgae radiation effects
Pigments, Biological metabolism
Subjects
Details
- Language :
- English
- ISSN :
- 1573-5079
- Volume :
- 143
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Photosynthesis research
- Publication Type :
- Academic Journal
- Accession number :
- 31705368
- Full Text :
- https://doi.org/10.1007/s11120-019-00686-x