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Phototrophic growth of Arthrospira platensis in a respiration activity monitoring system for shake flasks (RAMOS)

Optimising illumination is essential for optimising the growth of phototrophic cells and their production of desired metabolites and/or biomass. This requires appropriate modulation of light and other key inputs and continuous online monitoring of their metabolic activities. Powerful non-invasive systems for cultivating heterotrophic organisms include shake flasks in online monitoring units, but they are rarely used for phototrophs because they lack the appropriate illumination design and necessary illuminatory power.
This study presents the design and characterisation of a photosynthetic shake flask unit, illuminated from below by warm white light-emitting diodes with variable light intensities up to 2300 μmol m-2 s-1. The photosynthetic unit was successfully used, in combination with online monitoring of oxygen production, to cultivate Arthrospira platensis.
In phototrophic growth under continuous light and a 16 h light/8 h dark cycle (light intensity: 180 μmol m-2 s-1), the oxygen transfer rate and biomass-related oxygen production were - 1.5 mmol L-1 h-1 and 0.18 mmol O2 gx-1 h-1, respectively. The maximum specific growth rate was 0.058 h-1, during the exponential growth phase, after which the biomass concentration reached 0.75 g L-1.

Identiferoai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:30079
Date January 2014
CreatorsSocher, Maria Lisa, Lenk, Felix, Geipel, Katja, Schott, Carolin, Püschel, Joachim, Haas, Christiane, Grasse, Christiane, Bley, Thomas, Steingroewer, Juliane
PublisherWILEY-VCH Verlag GmbH & Co. KGaA
Source SetsHochschulschriftenserver (HSSS) der SLUB Dresden
LanguageEnglish
Detected LanguageEnglish
Typedoc-type:article, info:eu-repo/semantics/article, doc-type:Text
SourceEngineering in Life Sciences (2014), 14(6), S. 658-666. ISSN: 1618-2863. DOI: 10.1002/elsc.201300156.
Rightsinfo:eu-repo/semantics/openAccess
Relation10.1002/elsc.201300156

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