Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 411366
Title Photosynthetic efficiency of Chlamydomonas reinhardtii in flashing light
Author(s) Vejrazka, C.; Janssen, M.G.J.; Streefland, M.; Wijffels, R.H.
Source Biotechnology and Bioengineering 108 (2011)12. - ISSN 0006-3592 - p. 2905 - 2913.
DOI http://dx.doi.org/10.1002/bit.23270
Department(s) Bioprocess Engineering
VLAG
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) quantum yield - photobioreactors - microalgae - cyanobacteria - cultivation - dependence - intensity
Abstract Efficient light to biomass conversion in photobioreactors is crucial for economically feasible microalgae production processes. It has been suggested that photosynthesis is enhanced in short light path photobioreactors by mixing-induced flashing light regimes. In this study, photosynthetic efficiency and growth of the green microalga Chlamydomonas reinhardtii were measured using LED light to simulate light/dark cycles ranging from 5 to 100¿Hz at a light-dark ratio of 0.1 and a flash intensity of 1000¿µmol¿m-2¿s-1. Light flashing at 100¿Hz yielded the same photosynthetic efficiency and specific growth rate as cultivation under continuous illumination with the same time-averaged light intensity (i.e., 100¿µmol¿m-2¿s-1). The efficiency and growth rate decreased with decreasing flash frequency. Even at 5¿Hz flashing, the rate of linear electron transport during the flash was still 2.5 times higher than during maximal growth under continuous light, suggesting storage of reducing equivalents during the flash which are available during the dark period. In this way the dark reaction of photosynthesis can continue during the dark time of a light/dark cycle. Understanding photosynthetic growth in dynamic light regimes is crucial for model development to predict microalgal photobioreactor productivities. Biotechnol. Bioeng. 2011;108: 2905–2913. © 2011 Wiley Periodicals, Inc
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