What are the growth kinetics and biochemical compositions of microalgae isolated from diverse aquatic ecosystems in Morocco, France, and Tunisia?

Bouchra Assobhi; Yamina Bouchelta; Majed Alsubih; LamiaTrabelsi; Badr Alaoui-Sossé; Pascale Bourgeade; Lotfi Aleya; Mohammed Alaoui Mhamdi; Jamila Bahhou

doi:10.1007/s11356-024-33412-9

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 Apr 25. doi: 10.1007/s11356-024-33412-9. Online ahead of print.

Authors

Bouchra Assobhi¹, Yamina Bouchelta¹, Majed Alsubih², LamiaTrabelsi³, Badr Alaoui-Sossé⁴, Pascale Bourgeade⁴, Lotfi Aleya⁴, Mohammed Alaoui Mhamdi¹, Jamila Bahhou¹

Affiliations

¹ 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.
² Department of Civil Engineering, King Khalid University, Guraiger, Abha, 62529, Kingdom of Saudi Arabia.
³ Marine Biodiversity Laboratory, National Institute of Marine Sciences and Technology (INSTM), 2025 Salammbo, University of Carthage, Tunis, Tunisia. lamiatrabelsiakremi@gmail.com.
⁴ Laboratoire de Chrono-Environnement, UMR CNRS 6249, Université de Bourgogne Franche-Comté, La Bouloie, F-25030, Besançon Cedex, France.

PMID: 38662296
DOI: 10.1007/s11356-024-33412-9

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).

Keywords: Biochemical composition; Biotechnological potential; Growth kinetics; Microalgae.