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Influence of light absorption rate on the astaxanthin production by the microalga Haematococcus pluvialis during nitrogen starvation by Khadija Samhat; Antoinette Kazbar; Hosni Takache; Ali Ismail; Jeremy Pruvost is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

What is Influence of light absorption rate on the astaxanthin production by the microalga Haematococcus pluvialis during nitrogen starvation about?

Large amounts of astaxanthin (about 4% DW) can be produced under nitrogen starvation of __Haematococcus pluvialis__ in photobioreactors (PBRs) exposed to high light conditions to induce a light stress. However, in PBR, the large biomass concentration usually achieved leads to strong light attenuation conditions, which makes complex the analysis of this “light stress”. This study aims to elucidate the role of light transfer in astaxanthin cell content and productivity from the microalga __Haematococcus pluvialis__ during nitrogen starvation. __Haematococcus pluvialis__ was cultivated in a flat-panel PBR in a batch mode with sudden nitrogen starvation conditions and an incident photon flux density (PFD) of 250 μmol~hν~ m^−2^ s^−1^. Different initial biomass concentrations (\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${C}\_{{x}\_{0}}$$\end{document}Cx0) were evaluated, 0.21, 0.52, 1.39 and 2.21 kg m^−3^. As a result, spectral mass absorption cross-sections of __Haematococcus pluvialis__ were measured at

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Author

Khadija Samhat; Antoinette Kazbar; Hosni Takache; Ali Ismail; Jeremy Pruvost

Publisher

Springer

Published

2023

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)