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In situ mapping of the energy flow through the entire photosynthetic apparatus

Dostál, Jakub LU ; Pšenčík, Jakub and Zigmantas, Donatas LU (2016) In Nature Chemistry 8(7). p.705-710
Abstract

Absorption of sunlight is the first step in photosynthesis, which provides energy for the vast majority of organisms on Earth. The primary processes of photosynthesis have been studied extensively in isolated light-harvesting complexes and reaction centres, however, to understand fully the way in which organisms capture light it is crucial to also reveal the functional relationships between the individual complexes. Here we report the use of two-dimensional electronic spectroscopy to track directly the excitation-energy flow through the entire photosynthetic system of green sulfur bacteria. We unravel the functional organization of individual complexes in the photosynthetic unit and show that, whereas energy is transferred within... (More)

Absorption of sunlight is the first step in photosynthesis, which provides energy for the vast majority of organisms on Earth. The primary processes of photosynthesis have been studied extensively in isolated light-harvesting complexes and reaction centres, however, to understand fully the way in which organisms capture light it is crucial to also reveal the functional relationships between the individual complexes. Here we report the use of two-dimensional electronic spectroscopy to track directly the excitation-energy flow through the entire photosynthetic system of green sulfur bacteria. We unravel the functional organization of individual complexes in the photosynthetic unit and show that, whereas energy is transferred within subunits on a timescale of subpicoseconds to a few picoseconds, across the complexes the energy flows at a timescale of tens of picoseconds. Thus, we demonstrate that the bottleneck of energy transfer is between the constituents.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Chemistry
volume
8
issue
7
pages
6 pages
publisher
Nature Publishing Group
external identifiers
  • scopus:84975705219
  • wos:000378280400015
ISSN
1755-4330
DOI
10.1038/nchem.2525
language
English
LU publication?
yes
id
98b2ed2e-894d-4cad-be84-8d967b03eba4
date added to LUP
2017-01-17 16:10:58
date last changed
2017-11-05 05:12:21
@article{98b2ed2e-894d-4cad-be84-8d967b03eba4,
  abstract     = {<p>Absorption of sunlight is the first step in photosynthesis, which provides energy for the vast majority of organisms on Earth. The primary processes of photosynthesis have been studied extensively in isolated light-harvesting complexes and reaction centres, however, to understand fully the way in which organisms capture light it is crucial to also reveal the functional relationships between the individual complexes. Here we report the use of two-dimensional electronic spectroscopy to track directly the excitation-energy flow through the entire photosynthetic system of green sulfur bacteria. We unravel the functional organization of individual complexes in the photosynthetic unit and show that, whereas energy is transferred within subunits on a timescale of subpicoseconds to a few picoseconds, across the complexes the energy flows at a timescale of tens of picoseconds. Thus, we demonstrate that the bottleneck of energy transfer is between the constituents.</p>},
  author       = {Dostál, Jakub and Pšenčík, Jakub and Zigmantas, Donatas},
  issn         = {1755-4330},
  language     = {eng},
  month        = {07},
  number       = {7},
  pages        = {705--710},
  publisher    = {Nature Publishing Group},
  series       = {Nature Chemistry},
  title        = {In situ mapping of the energy flow through the entire photosynthetic apparatus},
  url          = {http://dx.doi.org/10.1038/nchem.2525},
  volume       = {8},
  year         = {2016},
}