Document Detail

Growth of non-phototrophic microorganisms using solar energy through mineral photocatalysis.
MedLine Citation:
PMID:  22473012     Owner:  NLM     Status:  In-Data-Review    
Phototrophy and chemotrophy are two dominant modes of microbial metabolism. To date, non-phototrophic microorganisms have been excluded from the solar light-centered phototrophic metabolism. Here we report a pathway that demonstrates a role of light in non-phototrophic microbial activity. In lab simulations, visible light-excited photoelectrons from metal oxide, metal sulfide, and iron oxide stimulated the growth of chemoautotrophic and heterotrophic bacteria. The measured bacterial growth was dependent on light wavelength and intensity, and the growth pattern matched the light absorption spectra of the minerals. The photon-to-biomass conversion efficiency was in the range of 0.13-1.90‰. Similar observations were obtained in a natural soil sample containing both bacteria and semiconducting minerals. Results from this study provide evidence for a newly identified, but possibly long-existing pathway, in which the metabolisms and growth of non-phototrophic bacteria can be stimulated by solar light through photocatalysis of semiconducting minerals.
Anhuai Lu; Yan Li; Song Jin; Xin Wang; Xiao-Lei Wu; Cuiping Zeng; Yan Li; Hongrui Ding; Ruixia Hao; Ming Lv; Changqiu Wang; Yueqin Tang; Hailiang Dong
Publication Detail:
Type:  Journal Article     Date:  2012-04-03
Journal Detail:
Title:  Nature communications     Volume:  3     ISSN:  2041-1723     ISO Abbreviation:  Nat Commun     Publication Date:  2012  
Date Detail:
Created Date:  2012-04-04     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101528555     Medline TA:  Nat Commun     Country:  England    
Other Details:
Languages:  eng     Pagination:  768     Citation Subset:  IM    
1] School of Earth and Space Sciences, Peking University, Beijing 100871, PR China. [2] School of Geosciences and Info-physics, Central South University, Changsha 410083, PR China. [3].
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