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Efficiency of Photosynthesis in a Chl d-Utilizing Cyanobacterium is Comparable to or Higher than that in Chl a-Utilizing Oxygenic SpeciesThe cyanobacterium Acaryochloris marina uses chlorophyll d to carry out oxygenic photosynthesis in environments depleted in visible and enhanced in lower-energy, far-red light. However, the extent to which low photon energies limit the efficiency of oxygenic photochemistry in A. marina is not known. Here, we report the first direct measurements of the energy-storage efficiency of the photosynthetic light reactions in A. marina whole cells,and find it is comparable to or higher than that in typical, chlorophyll a-utilizing oxygenic species. This finding indicates that oxygenic photosynthesis is not fundamentally limited at the photon energies employed by A. marina, and therefore is potentially viable in even longer-wavelength light environments.
Document ID
20120010643
Acquisition Source
Goddard Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Mielke, S. P.
(Rockefeller Univ. New York, NY, United States)
Kiang, N. Y.
(NASA Goddard Inst. for Space Studies New York, NY, United States)
Blankenship, R. E.
(Washington Univ. Saint Louis, MO, United States)
Gunner, M. R.
(City Coll. of the City Univ. of New York NY, United States)
Mauzerall, D.
(Rockefeller Univ. New York, NY, United States)
Date Acquired
August 26, 2013
Publication Date
June 25, 2011
Publication Information
Publication: Biochimica et Biophysica Acta
Volume: 1807
Issue: 9
Subject Category
Exobiology
Report/Patent Number
GSFC.JA.00416.2012
Funding Number(s)
CONTRACT_GRANT: DE-SC 0001423
CONTRACT_GRANT: NIH 5G12 RR03060
CONTRACT_GRANT: DE-SC 0001035
CONTRACT_GRANT: NNX08AP62G
Distribution Limits
Public
Copyright
Other

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