Improvement of Biomass and Phycoerythrin Production by a Strain of Rhodomonas sp. Isolated from the Tunisian Coast of Sidi Mansour - Université Clermont Auvergne Access content directly
Journal Articles Biomolecules Year : 2022

Improvement of Biomass and Phycoerythrin Production by a Strain of Rhodomonas sp. Isolated from the Tunisian Coast of Sidi Mansour

Hana Derbel
Jihen Elleuch
  • Function : Author
Latifa Tounsi
  • Function : Author
Marco Sebastiano Nicolo
  • Function : Author
Maria Giovanna Rizzo
  • Function : Author
Philippe Michaud
Imen Fendri
Slim Abdelkafi

Abstract

Microalgae are photoautotrophic microorganisms known as producers of a large variety of metabolites. The taxonomic diversity of these microorganisms has been poorly explored. In this study, a newly isolated strain was identified based on the 18S rRNA encoding gene. The phylogenetic analysis showed that the isolated strain was affiliated with the Rhodomonas genus. This genus has greatly attracted scientific attention according to its capacity to produce a large variety of metabolites, including phycoerythrin. Growth and phycoerythrin production conditions were optimized using a Plackett–Burman design and response surface methodology. An expression profile analysis of the cpeB gene, encoding the beta subunit of phycoerythrin, was performed by qRT-PCR under standard and optimized culture conditions. The optimization process showed that maximum cell abundance was achieved under the following conditions: CaCl2 = 2.1328 g/L, metal solution = 1 mL/L, pH = 7 and light intensity = 145 μmol photons/m2/s, whereas maximum phycoerythrin production level occurred when CaCl2 = 1.8467 g/L, metal solution = 1 mL/L, pH = 7 and light intensity = 157 μmol/m2/s. In agreement, positive transcriptional regulation of the cpeB gene was demonstrated using qRT-PCR. This study showed the successful optimization of abiotic conditions for highest growth and phycoerythrin production, making Rhodomonas sp. suitable for several biotechnological applications.

Dates and versions

hal-03727180 , version 1 (19-07-2022)

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Hana Derbel, Jihen Elleuch, Latifa Tounsi, Marco Sebastiano Nicolo, Maria Giovanna Rizzo, et al.. Improvement of Biomass and Phycoerythrin Production by a Strain of Rhodomonas sp. Isolated from the Tunisian Coast of Sidi Mansour. Biomolecules, 2022, 12 (7), pp.885. ⟨10.3390/biom12070885⟩. ⟨hal-03727180⟩
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