Enhanced Algal Photosynthetic Photon Efficiency by Pulsed Light.
biochemical analyses
biochemical mechanism
plant biochemistry
Journal
iScience
ISSN: 2589-0042
Titre abrégé: iScience
Pays: United States
ID NLM: 101724038
Informations de publication
Date de publication:
22 May 2020
22 May 2020
Historique:
received:
13
02
2020
revised:
07
04
2020
accepted:
26
04
2020
pubmed:
21
5
2020
medline:
21
5
2020
entrez:
21
5
2020
Statut:
ppublish
Résumé
We present experimental results demonstrating that, relative to continuous illumination, an increase of a factor of 3-10 in the photon efficiency of algal photosynthesis is attainable via the judicious application of pulsed light for light intensities of practical interest (e.g., average-to-peak solar irradiance). We also propose a simple model that can account for all the measurements. The model (1) reflects the essential rate-limiting elements in bioproductivity, (2) incorporates the impact of photon arrival-time statistics, and (3) accounts for how the enhancement in photon efficiency depends on the timescales of light pulsing and photon flux density. The key is avoiding "clogging" of the photosynthetic pathway by properly timing the light-dark cycles experienced by algal cells. We show how this can be realized with pulsed light sources, or by producing pulsed-light effects from continuous illumination via turbulent mixing in dense algal cultures in thin photobioreactors.
Identifiants
pubmed: 32434141
pii: S2589-0042(20)30300-X
doi: 10.1016/j.isci.2020.101115
pmc: PMC7235644
pii:
doi:
Types de publication
Journal Article
Langues
eng
Pagination
101115Informations de copyright
Copyright © 2020 The Author(s). Published by Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of Interests The authors have no conflict of interest to declare.
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