Excitation energy transfer in intact cells and in the phycobiliprotein antennae of the chlorophyll d containing cyanobacterium Acaryochloris marina

Theiss, Christoph; Schmitt, Franz‐Josef; Pieper, Jörg; Nganou, Collins; Grehn, Moritz; Vitali, Marco; Olliges, R.; Eichler, Hans Joachim; Eckert, Hann-Jörg

doi:10.1016/j.jplph.2011.02.002

Cited by 51 publications

(49 citation statements)

References 89 publications

(175 reference statements)

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“…PCC 7942 and hemispherical PBsomes from P. cruentum. In fact, PBsomes are represented by three distinct classes: (1) primitive rod-like PBsomes present in Acaryochloris marina (Theiss et al, 2011), in Gloeobacter violaceus (Krogmann et al, 2007), a common rock-dwelling organism (Mareš et al, 2013), and a similar rod-like PBsome with CpcG2 linker found in Synechocystis sp. PCC 6803 (Kondo et al, 2007); (2) widely distributed hemidiscoidal PBsomes are typical for cyanobacteria (e.g.…”

Section: Discussionmentioning

confidence: 99%

Phycobilisome Mobility and Its Role in the Regulation of Light Harvesting in Red Algae

et al. 2014

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Red algae represent an evolutionarily important group that gave rise to the whole red clade of photosynthetic organisms. They contain a unique combination of light-harvesting systems represented by a membrane-bound antenna and by phycobilisomes situated on thylakoid membrane surfaces. So far, very little has been revealed about the mobility of their phycobilisomes and the regulation of their light-harvesting system in general. Therefore, we carried out a detailed analysis of phycobilisome dynamics in several red alga strains and compared these results with the presence (or absence) of photoprotective mechanisms. Our data conclusively prove phycobilisome mobility in two model mesophilic red alga strains, Porphyridium cruentum and Rhodella violacea. In contrast, there was almost no phycobilisome mobility in the thermophilic red alga Cyanidium caldarium that was not caused by a decrease in lipid desaturation in this extremophile. Experimental data attributed this immobility to the strong phycobilisomephotosystem interaction that highly restricted phycobilisome movement. Variations in phycobilisome mobility reflect the different ways in which light-harvesting antennae can be regulated in mesophilic and thermophilic red algae. Fluorescence changes attributed in cyanobacteria to state transitions were observed only in mesophilic P. cruentum with mobile phycobilisomes, and they were absent in the extremophilic C. caldarium with immobile phycobilisomes. We suggest that state transitions have an important regulatory function in mesophilic red algae; however, in thermophilic red algae, this process is replaced by nonphotochemical quenching.

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Section: Discussionmentioning

confidence: 99%

Phycobilisome Mobility and Its Role in the Regulation of Light Harvesting in Red Algae

et al. 2014

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“…Last, quantum diffusion of excitons in aggregated phycocyanin thin films has been experimentally characterized recently [48], where the delocalization of excitons explains the enhancement of the diffusion length compared to the estimate of classical hopping theory. While this artificial system serves as an example of quantum diffusion in 2D, the naturally occurring form of phycocyanin in most cyanobacteria self-assembles into a finite 1D wire [49]. It is our ongoing effort to analyze this interesting system in this regard.…”

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confidence: 99%

Quantum Diffusion on Molecular Tubes: Universal Scaling of the 1D to 2D Transition

et al. 2016

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The transport properties of disordered systems are known to depend critically on dimensionality. We study the diffusion coefficient of a quantum particle confined to a lattice on the surface of a tube, where it scales between the 1D and 2D limits. It is found that the scaling relation is universal and independent of the temperature, disorder, and noise parameters, and the essential order parameter is the ratio between the localization length in 2D and the circumference of the tube. Phenomenological and quantitative expressions for transport properties as functions of disorder and noise are obtained and applied to real systems: In the natural chlorosomes found in light-harvesting bacteria the exciton transfer dynamics is predicted to be in the 2D limit, whereas a family of synthetic molecular aggregates is found to be in the homogeneous limit and is independent of dimensionality.

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“…In A. marina, Chl a has essentially been displaced by Chl d as the main photosynthetic pigment (10,11,24,34,(48)(49)(50) and its functional role appears more related to Chl d biosynthesis (45) and charge recombination in photosystem II (50). Photoacclimation in the A. marina type strain MBIC11017 appears to be performed through alterations of Chl a/d ratios under high-light (10, 32) and low-light (18,48) conditions, while chromatic photoacclimation in A. marina was reported to involve regulation of its phycobiliprotein content (17).…”

Section: Discussionmentioning

confidence: 99%

“…Due to its unique possession of Chl d, such A. marina cultures have been the subject of a number of detailed studies, including studies of its genome (32,47), its basic photophysiology (2,8,49,50), Chl d biosynthesis (45), chromatic photoacclimation (18), pigment composition (1,9), and ultrastructure (28,48). A recent study also demonstrated the presence and activity of N 2 fixation under hypoxic conditions in a culture of the A. marina strain HICR111A (36).…”

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confidence: 99%

Biofilm Growth and Near-Infrared Radiation-Driven Photosynthesis of the Chlorophyll d -Containing Cyanobacterium Acaryochloris marina

Behrendt

Schrameyer

Qvortrup

et al. 2012

Appl Environ Microbiol

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The cyanobacterium Acaryochloris marina is the only known phototroph harboring chlorophyll (Chl) d. It is easy to cultivate it in a planktonic growth mode, and A. marina cultures have been subject to detailed biochemical and biophysical characterization. In natural situations, A. marina is mainly found associated with surfaces, but this growth mode has not been studied yet. Here, we show that the A. marina type strain MBIC11017 inoculated into alginate beads forms dense biofilm-like cell clusters, as in natural A. marina biofilms, characterized by strong O 2 concentration gradients that change with irradiance. Biofilm growth under both visible radiation (VIS, 400 to 700 nm) and near-infrared radiation (NIR, ϳ700 to 730 nm) yielded maximal cell-specific growth rates of 0.38 per day and 0.64 per day, respectively. The population doubling times were 1.09 and 1.82 days for NIR and visible light, respectively. The photosynthesis versus irradiance curves showed saturation at a photon irradiance of E k (saturating irradiance) >250

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Excitation energy transfer in intact cells and in the phycobiliprotein antennae of the chlorophyll d containing cyanobacterium Acaryochloris marina

Cited by 51 publications

References 89 publications

Phycobilisome Mobility and Its Role in the Regulation of Light Harvesting in Red Algae

Phycobilisome Mobility and Its Role in the Regulation of Light Harvesting in Red Algae

Quantum Diffusion on Molecular Tubes: Universal Scaling of the 1D to 2D Transition

Biofilm Growth and Near-Infrared Radiation-Driven Photosynthesis of the Chlorophyll d -Containing Cyanobacterium Acaryochloris marina

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