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Assobhi B, Bouchelta Y, Alsubih M, LamiaTrabelsi, Alaoui-Sossé B, Bourgeade P, Aleya L, Mhamdi MA, Bahhou J. What are the growth kinetics and biochemical compositions of microalgae isolated from diverse aquatic ecosystems in Morocco, France, and Tunisia? Environ Sci Pollut Res Int 2024:10.1007/s11356-024-33412-9. [PMID: 38662296 DOI: 10.1007/s11356-024-33412-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 04/17/2024] [Indexed: 04/26/2024]
Abstract
Thirty-six microalgae belonging to five taxonomic groups (Cyanobacteria, Chlorophyceae, Diatomophyceae, Euglenophyceae, and Eustigmatophyceae) were identified from six freshwater ecosystems in Morocco, two treatment stations in Etueffont landfill in France and three hot spring waters in Tunisia. Investigations on species growth kinetics and growth rates showed that the cyanobacterium Leptolyngbya gelatinosa exhibited both the highest biomass and growth rate with 4 g DW L-1 and 0.282 day-1, respectively. A significant protein production (more than 40% DW) was observed across the studied species. Cyanobacteria and chlorophytes stood out for their increased protein production with a maximum (66.63 ± 3.84% DW) attained by the cyanobacterium Leptolyngbya sp. Chlorophytes produced substantial amounts of carbohydrates (more than 20% DW). Euglenophytes including Phacus orbicularis and Euglena ehrenbergii along with the chlorophyte Graesiella sp. accumulated significant amounts of lipids (up to 31.12% DW).
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Affiliation(s)
- Bouchra Assobhi
- Faculty of Sciences Dhar El Mahraz, Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Sidi Mohammed Ben Abdellah University of Fez, P.O. Box 1796, Atlas-, Fez, Morocco
| | - Yamina Bouchelta
- Faculty of Sciences Dhar El Mahraz, Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Sidi Mohammed Ben Abdellah University of Fez, P.O. Box 1796, Atlas-, Fez, Morocco
| | - Majed Alsubih
- Department of Civil Engineering, King Khalid University, Guraiger, Abha, 62529, Kingdom of Saudi Arabia
| | - LamiaTrabelsi
- Marine Biodiversity Laboratory, National Institute of Marine Sciences and Technology (INSTM), 2025 Salammbo, University of Carthage, Tunis, Tunisia.
| | - Badr Alaoui-Sossé
- Laboratoire de Chrono-Environnement, UMR CNRS 6249, Université de Bourgogne Franche-Comté, La Bouloie, F-25030, Besançon Cedex, France
| | - Pascale Bourgeade
- Laboratoire de Chrono-Environnement, UMR CNRS 6249, Université de Bourgogne Franche-Comté, La Bouloie, F-25030, Besançon Cedex, France
| | - Lotfi Aleya
- Laboratoire de Chrono-Environnement, UMR CNRS 6249, Université de Bourgogne Franche-Comté, La Bouloie, F-25030, Besançon Cedex, France
| | - Mohammed Alaoui Mhamdi
- Faculty of Sciences Dhar El Mahraz, Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Sidi Mohammed Ben Abdellah University of Fez, P.O. Box 1796, Atlas-, Fez, Morocco
| | - Jamila Bahhou
- Faculty of Sciences Dhar El Mahraz, Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Sidi Mohammed Ben Abdellah University of Fez, P.O. Box 1796, Atlas-, Fez, Morocco
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Assobhi B, Ennasry H, Latique S, Kara M, Alaoui Mhamdi M, Bahhou J. Influence of salinity, nitrogen and phosphorus concentrations on the physiological and biochemical characteristics of two Chlorophyceae isolated from Fez freshwater, Morocco. Sci Rep 2024; 14:8259. [PMID: 38589560 PMCID: PMC11001895 DOI: 10.1038/s41598-024-58864-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 04/03/2024] [Indexed: 04/10/2024] Open
Abstract
Microalgae are widely exploited for numerous biotechnology applications, including biofuels. In this context, Chlamydomonas debaryana and Chlorococcum sp. were isolated from Fez freshwater (Morocco), and their growth and lipid and carbohydrate production were assessed at different concentrations of NaCl, NaNO3, and K2HPO4. The results indicate a small positive variation in growth parameters linked to nutrient enrichment, with no considerable variation in carbohydrate and lipid levels in both algae. Moreover, a negative variation was recorded at increased salinity and nutrient limitation, accompanied by lipid and carbohydrate accumulation. Chlorococcum sp. showed better adaptation to salt stress below 200 mM NaCl. Furthermore, its growth and biomass productivity were strongly reduced by nitrogen depletion, and its lipid production reached 47.64% DW at 3.52 mM NaNO3. As for Chlamydomonas debaryana, a substantial reduction in growth was induced by nutrient depletion, a maximal carbohydrate level was produced at less than 8.82 mM NaNO3 (40.59% DW). The effect of phosphorus was less significant. However, a concentration of 0.115 mM K2HPO4 increased lipid and carbohydrate content without compromising biomass productivity. The results suggest that growing the two Chlorophyceae under these conditions seems interesting for biofuel production, but the loss of biomass requires a more efficient strategy to maximize lipid and carbohydrate accumulation without loss of productivity.
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Affiliation(s)
- Bouchra Assobhi
- Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco.
| | - Houda Ennasry
- Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Salma Latique
- Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
- Laboratory of Toxicology and Pharmacology, Faculty of Medicine and Pharmacy, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Mohammed Kara
- Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Mohammed Alaoui Mhamdi
- Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
| | - Jamila Bahhou
- Laboratory of Biotechnology, Conservation and Valorization of Natural Resources, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University, Fez, Morocco
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Sellami I, Hamza A, Alaoui Mhamdi M, Aleya L, Bouain A, Ayadi H. Abundance and biomass of rotifers in relation to the environmental factors in geothermal waters in Southern Tunisia. J Therm Biol 2009. [DOI: 10.1016/j.jtherbio.2009.03.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Mhamdi BA, Azzouzi A, Elloumi J, Ayadi H, Mhamdi MA, Aleya L. Exchange potentials of phosphorus between sediments and water coupled to alkaline phosphatase activity and environmental factors in an oligo-mesotrophic reservoir. C R Biol 2007; 330:419-28. [PMID: 17531792 DOI: 10.1016/j.crvi.2007.02.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2006] [Revised: 02/21/2007] [Accepted: 02/22/2007] [Indexed: 11/18/2022]
Abstract
We investigated the exchange potentials of phosphates at the water-sediment interface together with in situ benthic-chamber fractionated alkaline phosphatase activity and bacteria estimates during September and October 1998 at two stations: station 1, which received immediately the urban inputs from the Taounate city, and station 2, located in the centre of the Sahela reservoir (Morocco). The results showed that low oxygenation enhanced both the bacterial abundance and the alkaline phosphatase activity. Size-fractionated (0.65-100 microm) bacteria attached to dead organic matter together with algae and zooplankton contributed strongly (78%) to the total alkaline phosphatase synthesis in the two sampled stations, suggesting that attachment to organic particles stimulated phosphatase activities. The appearance of anoxic conditions and the decrease of pH supported the dissolution of particulate phosphorus and the release of soluble reactive phosphorus. This latter, together with persisting discharges of organic matter, sewage, and olive mill waste will exacerbate the eutrophication of the reservoir.
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Affiliation(s)
- Badre Alaoui Mhamdi
- Département de biologie, faculté des sciences, université Sidi-Mohammed-Ben-Abdallah, BP 1796, Fès-Atlas, Morocco
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