Cultivating Microalgae in Desert Conditions: Evaluation of the Effect of Light-Temperature Summer Conditions on the Growth and Metabolism of <i>Nannochloropsis</i> QU130
Temperature and light are two of the most crucial factors for microalgae production. Variations in these factors alter their growth kinetics, macromolecular composition and physiological properties, including cell membrane permeability and fluidity. The variations define the adaptation mechanisms ad...
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MDPI AG
2021-04-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/9/3799 |
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| author | Hareb Al Jabri Aumaya Taleb Raphaelle Touchard Imen Saadaoui Vincent Goetz Jeremy Pruvost |
| author_facet | Hareb Al Jabri Aumaya Taleb Raphaelle Touchard Imen Saadaoui Vincent Goetz Jeremy Pruvost |
| author_sort | Hareb Al Jabri |
| collection | DOAJ |
| description | Temperature and light are two of the most crucial factors for microalgae production. Variations in these factors alter their growth kinetics, macromolecular composition and physiological properties, including cell membrane permeability and fluidity. The variations define the adaptation mechanisms adopted by the microalgae to withstand changes in these environmental factors. In the Qatar desert the temperature varies widely, typically between 10° and 45 °C There are also wide variations in light intensity, with values of over 1500 μmol<sub>hν</sub>.m<sup>−2</sup>s<sup>−1</sup> in summer. A study of the effects of these thermal and light fluctuations is therefore essential for large-scale outdoor production systems, especially during the summer when temperature and light fluctuations are at their highest. The aim of this work is to study the impact of temperature and light intensity variations as encountered in summer period on the <i>Nannochloropsis</i> QU130 strain, which was selected for its suitability for outdoor cultivation in the harsh conditions of the Qatar desert. It was carried out using lab-scale photobioreactors enabling simulation of both constant and dynamic temperature and light regimes. Biomass productivity, cell morphology and biochemical compositions were examined first in constant conditions, then in typical outdoor cultivation conditions to elucidate the adjustments in cell function in respect of fluctuations. The dynamic light and temperature were shown to have interactive effects. The application of temperature cycles under constant light led to a 13.6% increase in biomass productivity, while a 45% decrease was observed under light and temperature regimes due to the combined stress. In all cases, the results proved that <i>N</i>. sp. QU130 has a high level of adaptation to the wide fluctuations in light and temperature stress. This was shown through its ability to easily change its physiology (cell size) and metabolic process in response to different cultivation conditions. |
| first_indexed | 2024-03-10T12:05:04Z |
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| language | English |
| last_indexed | 2024-03-10T12:05:04Z |
| publishDate | 2021-04-01 |
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| series | Applied Sciences |
| spelling | doaj.art-c50f712e0f014cc792b180e358c6d2e02023-11-21T16:42:25ZengMDPI AGApplied Sciences2076-34172021-04-01119379910.3390/app11093799Cultivating Microalgae in Desert Conditions: Evaluation of the Effect of Light-Temperature Summer Conditions on the Growth and Metabolism of <i>Nannochloropsis</i> QU130Hareb Al Jabri0Aumaya Taleb1Raphaelle Touchard2Imen Saadaoui3Vincent Goetz4Jeremy Pruvost5CNRS, GEPEA, UMR 6144, Université de Nantes, Oniris, F-44600 Saint-Nazaire, FranceCNRS, GEPEA, UMR 6144, Université de Nantes, Oniris, F-44600 Saint-Nazaire, FranceCNRS, GEPEA, UMR 6144, Université de Nantes, Oniris, F-44600 Saint-Nazaire, FranceAlgal Technologies Program, Centre for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, QatarPROMES-CNRS, UPR 8521, Tecnosud, Rambla de la Thermodynamique, 66100 Perpignan, FranceCNRS, GEPEA, UMR 6144, Université de Nantes, Oniris, F-44600 Saint-Nazaire, FranceTemperature and light are two of the most crucial factors for microalgae production. Variations in these factors alter their growth kinetics, macromolecular composition and physiological properties, including cell membrane permeability and fluidity. The variations define the adaptation mechanisms adopted by the microalgae to withstand changes in these environmental factors. In the Qatar desert the temperature varies widely, typically between 10° and 45 °C There are also wide variations in light intensity, with values of over 1500 μmol<sub>hν</sub>.m<sup>−2</sup>s<sup>−1</sup> in summer. A study of the effects of these thermal and light fluctuations is therefore essential for large-scale outdoor production systems, especially during the summer when temperature and light fluctuations are at their highest. The aim of this work is to study the impact of temperature and light intensity variations as encountered in summer period on the <i>Nannochloropsis</i> QU130 strain, which was selected for its suitability for outdoor cultivation in the harsh conditions of the Qatar desert. It was carried out using lab-scale photobioreactors enabling simulation of both constant and dynamic temperature and light regimes. Biomass productivity, cell morphology and biochemical compositions were examined first in constant conditions, then in typical outdoor cultivation conditions to elucidate the adjustments in cell function in respect of fluctuations. The dynamic light and temperature were shown to have interactive effects. The application of temperature cycles under constant light led to a 13.6% increase in biomass productivity, while a 45% decrease was observed under light and temperature regimes due to the combined stress. In all cases, the results proved that <i>N</i>. sp. QU130 has a high level of adaptation to the wide fluctuations in light and temperature stress. This was shown through its ability to easily change its physiology (cell size) and metabolic process in response to different cultivation conditions.https://www.mdpi.com/2076-3417/11/9/3799microalgaeculturedeserttemperaturelight<i>Nannochloropsis</i> |
| spellingShingle | Hareb Al Jabri Aumaya Taleb Raphaelle Touchard Imen Saadaoui Vincent Goetz Jeremy Pruvost Cultivating Microalgae in Desert Conditions: Evaluation of the Effect of Light-Temperature Summer Conditions on the Growth and Metabolism of <i>Nannochloropsis</i> QU130 Applied Sciences microalgae culture desert temperature light <i>Nannochloropsis</i> |
| title | Cultivating Microalgae in Desert Conditions: Evaluation of the Effect of Light-Temperature Summer Conditions on the Growth and Metabolism of <i>Nannochloropsis</i> QU130 |
| title_full | Cultivating Microalgae in Desert Conditions: Evaluation of the Effect of Light-Temperature Summer Conditions on the Growth and Metabolism of <i>Nannochloropsis</i> QU130 |
| title_fullStr | Cultivating Microalgae in Desert Conditions: Evaluation of the Effect of Light-Temperature Summer Conditions on the Growth and Metabolism of <i>Nannochloropsis</i> QU130 |
| title_full_unstemmed | Cultivating Microalgae in Desert Conditions: Evaluation of the Effect of Light-Temperature Summer Conditions on the Growth and Metabolism of <i>Nannochloropsis</i> QU130 |
| title_short | Cultivating Microalgae in Desert Conditions: Evaluation of the Effect of Light-Temperature Summer Conditions on the Growth and Metabolism of <i>Nannochloropsis</i> QU130 |
| title_sort | cultivating microalgae in desert conditions evaluation of the effect of light temperature summer conditions on the growth and metabolism of i nannochloropsis i qu130 |
| topic | microalgae culture desert temperature light <i>Nannochloropsis</i> |
| url | https://www.mdpi.com/2076-3417/11/9/3799 |
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