1
|
Helamieh M, Reich M, Rohne P, Riebesell U, Kerner M, Kümmerer K. Impact of green and blue-green light on the growth, pigment concentration, and fatty acid unsaturation in the microalga Monoraphidium braunii. Photochem Photobiol 2024; 100:587-595. [PMID: 37882377 DOI: 10.1111/php.13873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 10/04/2023] [Accepted: 10/04/2023] [Indexed: 10/27/2023]
Abstract
The spectral composition of light is an important factor for the metabolism of photosynthetic organisms. Several blue light-regulated metabolic processes have already been identified in the industrially relevant microalga Monoraphidium braunii. However, little is known about the spectral impact on this species' growth, fatty acid (FA), and pigment composition. In this study, M. braunii was cultivated under different light spectra (white light: 400-700 nm, blue light: 400-550 nm, green light: 450-600 nm, and red light: 580-700 nm) at 25°C for 96 h. The growth was monitored daily. Additionally, the FA composition, and pigment concentration was analyzed after 96 h. The highest biomass production was observed upon white light and red light irradiation. However, green light also led to comparably high biomass production, fueling the scientific debate about the contribution of weakly absorbed light wavelengths to microalgal biomass production. All light spectra (white, blue, and green) that comprised blue-green light (450-550 nm) led to a higher degree of FA unsaturation and a greater concentration of all identified pigments than red light. These results further contribute to the growing understanding that blue-green light is an essential trigger for maximized pigment concentration and FA unsaturation in green microalgae.
Collapse
Affiliation(s)
- Mark Helamieh
- Institute of Sustainable Chemistry, Leuphana University of Lueneburg, Lueneburg, Germany
- Strategic Science Consult Ltd., Hamburg, Germany
| | - Marco Reich
- Institute of Sustainable Chemistry, Leuphana University of Lueneburg, Lueneburg, Germany
| | - Philipp Rohne
- Institute of Pharmacy and Biochemistry, Therapeutical Life Sciences, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Ulf Riebesell
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
| | | | - Klaus Kümmerer
- Institute of Sustainable Chemistry, Leuphana University of Lueneburg, Lueneburg, Germany
| |
Collapse
|
2
|
Juan-García A, Juan C, Taipale S, Vehniäinen ER. Beauvericin and enniatin B mycotoxins alter aquatic ecosystems: Effects on green algae. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2024; 107:104415. [PMID: 38503354 DOI: 10.1016/j.etap.2024.104415] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Accepted: 03/14/2024] [Indexed: 03/21/2024]
Abstract
Myxotoxins can contaminate algal-based products and arrive to the food chain to consumers producing chronic toxicity effects. Here, we studied phytotoxicity of mycotoxins, beauvericin (BEA) and ennaitin B (ENN B) in four phytoplankton strains: Acutodesmus sp., Chlamydomonas reinhardtii, Haematococcus pluvialis, and Monoraphidium griffithii, which are all green algae. It was tested the capacity of clearing the media of BEA and ENN B at different concentrations by comparing nominal and measured quantifications. Results revealed that Acutodesmus sp. and C. reinhardtii tended to flow up and down growth rate without reaching values below 50% or 60%, respectively. On the other hand, for H. pluvialis and M. griffith, IC50 values were reached. Regarding the clearance of media, in individual treatment a decrease of the quantified mycotoxin between nominal and measured values was observed; while in binary treatment, differences among both values were higher and more noted for BEA than for ENN B.
Collapse
Affiliation(s)
- Ana Juan-García
- Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy and Food Science, University of Valencia, Av. Vicent Andrés Estellés s/n, València, Burjassot 46100, Spain; Department of Biological and Environmental Science, University of Jyväskylä, Survontie 9C, Jyväskylä FI-40014, Finland.
| | - Cristina Juan
- Laboratory of Food Chemistry and Toxicology, Faculty of Pharmacy and Food Science, University of Valencia, Av. Vicent Andrés Estellés s/n, València, Burjassot 46100, Spain
| | - Sami Taipale
- Department of Biological and Environmental Science, University of Jyväskylä, Survontie 9C, Jyväskylä FI-40014, Finland
| | - Eeva-Riikka Vehniäinen
- Department of Biological and Environmental Science, University of Jyväskylä, Survontie 9C, Jyväskylä FI-40014, Finland
| |
Collapse
|
3
|
Helamieh M, Reich M, Bory S, Rohne P, Riebesell U, Kerner M, Kümmerer K. Blue-green light is required for a maximized fatty acid unsaturation and pigment concentration in the microalga Acutodesmus obliquus. Lipids 2022; 57:221-232. [PMID: 35460080 DOI: 10.1002/lipd.12343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 04/05/2022] [Accepted: 04/05/2022] [Indexed: 11/06/2022]
Abstract
Blue-green light is known to maximize the degree of fatty acid (FA) unsaturation in microalgae. However, knowledge on the particular waveband responsible for this stimulation of FA desaturation and its impact on the pigment composition in microalgae remains limited. In this study, Acutodesmus obliquus was cultivated for 96 h at 15°C with different light spectra (380-700 nm, 470-700 nm, 520-700 nm, 600-700 nm, and dark controls). Growth was monitored daily, and qualitative characterization of the microalgal FA composition was achieved via gas chromatography coupled with electron impact ionization mass spectrometry (GC-EI/MS). Additionally, a quantitative analysis of microalgal pigments was performed using high-performance liquid chromatography with diode array detection (HPLC-DAD). Spectra that included wavelengths between 470 and 520 nm led to a significantly higher percentage of the polyunsaturated fatty acids (PUFA) 18:3 and 16:4, compared to all other light conditions. However, no significant differences between the red light cultivations and the heterotrophic dark controls were observed for the FA 18:3 and 16:4. These results indicate, that exclusively the blue-green light waveband between 470 and 520 nm is responsible for a maximized FA unsaturation in A. obliquus. Furthermore, the growth and production of pigments were impaired if blue-green light (380-520 nm) was absent in the light spectrum. This knowledge can contribute to achieving a suitable microalgal pigment and FA composition for industrial purposes and must be considered in spectrally selective microalgae cultivation systems.
Collapse
Affiliation(s)
- Mark Helamieh
- Institute of Sustainable Chemistry, Leuphana University of Lueneburg, Lueneburg, Germany.,Strategic Science Consult Ltd, Hamburg, Germany
| | - Marco Reich
- Institute of Sustainable Chemistry, Leuphana University of Lueneburg, Lueneburg, Germany
| | - Sophie Bory
- Institute of Sustainable Chemistry, Leuphana University of Lueneburg, Lueneburg, Germany
| | - Philipp Rohne
- Institute of Pharmacy and Biochemistry, Therapeutical Life Sciences, Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Ulf Riebesell
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
| | | | - Klaus Kümmerer
- Institute of Sustainable Chemistry, Leuphana University of Lueneburg, Lueneburg, Germany
| |
Collapse
|
4
|
Krimech A, Helamieh M, Wulf M, Krohn I, Riebesell U, Cherifi O, Mandi L, Kerner M. Differences in adaptation to light and temperature extremes of Chlorella sorokiniana strains isolated from a wastewater lagoon. BIORESOURCE TECHNOLOGY 2022; 350:126931. [PMID: 35247554 DOI: 10.1016/j.biortech.2022.126931] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 02/24/2022] [Accepted: 02/26/2022] [Indexed: 06/14/2023]
Abstract
Presently, two Chlorella sorokiniana strains sampled during summer (CS-S) and winter (CS-W) from a maturation pond and isolated by dominance were studied on their behavior on temperature and light extremes in batch experiments. Although both strains showed no differences in their tolerance of temperatures up to 45 °C, the growth rates, pigment contents and fatty acid compositions in response to PAR at 700 and 1,500 µmol m-2sec-1 differed. CS-W was less affected by photoinhibition and maintained constantly high growth rates. High radiation resulted in both strains in an equivalent decrease of chlorophyll a and accessory pigments indicating that the latter did not function as a light filter. PUFAS (18:3 and 16:3) increased in CS-W at high radiation by > 60% and decreased in CS-S by 8 %. Results indicate that CS-W is highly favorable for mass cultivation particularly in outdoors, in which diurnal variations of solar radiation occur.
Collapse
Affiliation(s)
- Aafaf Krimech
- National Center for Studies and Research on Water and Energy, Cadi Ayyad University, Marrakech, Morocco; Laboratory of Water, Biodiversity, and Climate Change, Cadi Ayyad University, Marrakech, Morocco
| | - Mark Helamieh
- SSC Strategic Science Consult GmbH, Hamburg, Germany
| | - Melina Wulf
- SSC Strategic Science Consult GmbH, Hamburg, Germany
| | - Ines Krohn
- Universität Hamburg, Institute of Plant Science and Microbiology, Department of Microbiology and Biotechnology, Hamburg, Germany
| | - Ulf Riebesell
- GEOMAR Helmholtz Centre for Ocean Research Kiel, Biological Oceanography, Kiel, Germany
| | - Ouafa Cherifi
- National Center for Studies and Research on Water and Energy, Cadi Ayyad University, Marrakech, Morocco; Laboratory of Water, Biodiversity, and Climate Change, Cadi Ayyad University, Marrakech, Morocco
| | - Laila Mandi
- National Center for Studies and Research on Water and Energy, Cadi Ayyad University, Marrakech, Morocco; Laboratory of Water, Biodiversity, and Climate Change, Cadi Ayyad University, Marrakech, Morocco
| | - Martin Kerner
- SSC Strategic Science Consult GmbH, Hamburg, Germany.
| |
Collapse
|