scholarly journals Electronic coherence lifetimes of the Fenna–Matthews–Olson complex and light harvesting complex II

2019 ◽  
Vol 10 (45) ◽  
pp. 10503-10509 ◽  
Author(s):  
Shawn Irgen-Gioro ◽  
Karthik Gururangan ◽  
Rafael G. Saer ◽  
Robert E. Blankenship ◽  
Elad Harel
Keyword(s):  
Energy Transport ◽  
Light Harvesting ◽  
Light Harvesting Complex ◽  
Complex Ii ◽  
Efficient Energy ◽  
Naturally Occurring ◽  
Light Harvesting Complex Ii ◽  
Electronic Coherence ◽  
Excitonic States

The study of coherence between excitonic states in naturally occurring photosynthetic systems offers tantalizing prospects for uncovering mechanisms of efficient energy transport.

Macroorganisation and flexibility of thylakoid membranes

2019 ◽  
Vol 476 (20) ◽  
pp. 2981-3018 ◽  
Author(s):  
Petar H. Lambrev ◽  
Parveen Akhtar
Keyword(s):  
Light Harvesting ◽  
Current Knowledge ◽  
Three Dimensional ◽  
Photosynthetic Apparatus ◽  
Dynamic Responses ◽  
State Transitions ◽  
Photochemical Quenching ◽  
Light Harvesting Complex ◽  
Complex Ii ◽  
Light Harvesting Complex Ii

Abstract The light reactions of photosynthesis are hosted and regulated by the chloroplast thylakoid membrane (TM) — the central structural component of the photosynthetic apparatus of plants and algae. The two-dimensional and three-dimensional arrangement of the lipid–protein assemblies, aka macroorganisation, and its dynamic responses to the fluctuating physiological environment, aka flexibility, are the subject of this review. An emphasis is given on the information obtainable by spectroscopic approaches, especially circular dichroism (CD). We briefly summarise the current knowledge of the composition and three-dimensional architecture of the granal TMs in plants and the supramolecular organisation of Photosystem II and light-harvesting complex II therein. We next acquaint the non-specialist reader with the fundamentals of CD spectroscopy, recent advances such as anisotropic CD, and applications for studying the structure and macroorganisation of photosynthetic complexes and membranes. Special attention is given to the structural and functional flexibility of light-harvesting complex II in vitro as revealed by CD and fluorescence spectroscopy. We give an account of the dynamic changes in membrane macroorganisation associated with the light-adaptation of the photosynthetic apparatus and the regulation of the excitation energy flow by state transitions and non-photochemical quenching.

scholarly journals The Three Isoforms of the Light-harvesting Complex II

2004 ◽  
Vol 279 (35) ◽  
pp. 36884-36891 ◽  
Author(s):  
Joerg Standfuss ◽  
Werner Kühlbrandt
Keyword(s):  
Light Harvesting ◽  
Light Harvesting Complex ◽  
Complex Ii ◽  
Light Harvesting Complex Ii
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