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Organic Carbon is ineffective in enhancing the growth of Dunaliella

Organic Carbon is ineffective in enhancing the growth of Dunaliella

de Souza Celente, Gleison, Medianeira Rizzetti, Tiele, de Cassia de Souza Schneider, Rosana, Harvey, Patricia ORCID: 0000-0001-7193-4570 and Sui, Yixing ORCID: 0000-0003-2646-5773 (2022) Organic Carbon is ineffective in enhancing the growth of Dunaliella. Fermentation, 8 (6):261. pp. 1-15. ISSN 2311-5637 (Online) (doi:

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(1) Background: Mixotrophic growth is commonly associated with higher biomass productivity and lower energy consumption. This paper evaluates the impact of using different carbon sources on growth, protein profile, and nutrient uptake for Dunaliella tertiolecta CCAP 19/30 to assess the potential for mixotrophic growth. (2) Methods: Two experimental sets were conducted. The first assessed the contribution of atmospheric carbon to D. tertiolecta growth and the microalgae capacity to grow heterotrophically with an organic carbon source to provide both carbon and energy. The second set evaluated the impact of using different carbon sources on its growth, protein yield and quality. (3) Results: D. tertiolecta could not grow heterotrophically. Cell and optical density, ash-free dry weight, and essential amino acids index were inferior for all treatments using organic carbon compared to NaHCO3. Neither cell nor optical density presented significant differences among the treatments containing organic carbon, demonstrating that organic carbon does not boost D. tertiolecta growth. All the treatments presented similar nitrogen, phosphorus, sulfur recovery, and relative carbohydrate content. (4) Conclusions: Based on the results of this paper, D. tertiolecta CCAP 19/30 is an obligated autotroph that cannot grow mixotrophically using organic carbon.

Item Type: Article
Additional Information: This article belongs to the Special Issue Valorization of Waste from Agro-Food, Food and Marine Industry.
Uncontrolled Keywords: mixotrophic growth; wastewater reuse; protein; essential amino acids; Dunaliella tertiolecta
Subjects: Q Science > Q Science (General)
Q Science > QK Botany
Faculty / School / Research Centre / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Algal Biotechnology Research Group
Faculty of Engineering & Science > School of Science (SCI)
Last Modified: 13 Dec 2022 15:32

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