Kinetics of excitation energy transfer in the cyanobacterial phycobilisome-Photosystem II complex

1991 ◽  
Vol 1098 (1) ◽  
pp. 68-78 ◽  
Author(s):  
Conrad W Mullineaux ◽  
Alfred R Holzwarth
Keyword(s):  
Energy Transfer ◽  
Photosystem Ii ◽  
Excitation Energy ◽  
Excitation Energy Transfer ◽  
Kinetics Of

Cerulenin-Induced Modifications in the Fatty Acid Composition Affect Excitation Energy Transfer in Thylakoids of Petunia hybrida Leaves

1988 ◽  
Vol 43 (5-6) ◽  
pp. 431-437 ◽  
Author(s):  
Josef A. Graf ◽  
Karin Witzan ◽  
Reto J. Strasser
Keyword(s):  
Fatty Acid Composition ◽  
Energy Transfer ◽  
Fatty Acid ◽  
Photosystem Ii ◽  
Energy Distribution ◽  
Excitation Energy ◽  
Acid Composition ◽  
Petunia Hybrida ◽  
Excitation Energy Transfer ◽  
Acyl Lipids

Cerulenin-induced modifications in the fatty acid composition have been used to investigate the influence of acyl lipids on excitation energy distribution in thylakoid membranes of Petunia hybrida by means of 77 K fluorescence spectroscopy. Although cerulenin has no effect on relative contents of chlorophyll and acyl lipids, changes in the fatty acid composition of all thylakoid acyl lipids have been observed. The main cerulenin effect seems to be an increase in linoleic acid at the expense of saturated and monounsaturated C16- and C18-fatty acids resulting most likely in an increase in acyl lipid species containing both linoleic and linolenic acid. Low temperature (77 K ) fluorescence kinetics reveal a remarkable decrease in the ratio of the variable divided by the maximal fluorescence of photosystem II (F2(v)/F2(M)), taken as indicator for cerulenin-induced changes in this photosystem. Calculations of the excitation energy distribution terms based on a grouped bipartite model of photosynthesis suggest that a decrease in this ratio is caused by changes in energy transfer probabilities responsible for both, photochemical trapping of photosystem II and energetic cooperativity (grouping) between different photosystem II-light harvesting complex-units. Moreover, changes in the conformation responsible for spillover energy transfer are most likely to occur. Correlations between cerulenin-induced modifications of fatty acid composition and energy distribution support the assumption that excitation energy transfer depends on the structural state of the lipid matrix.

scholarly journals Excitation Energy Transfer and Charge Separation in Photosystem II Membranes Revisited

2006 ◽  
Vol 91 (10) ◽  
pp. 3776-3786 ◽  
Author(s):  
Koen Broess ◽  
Gediminas Trinkunas ◽  
Chantal D. van der Weij-de Wit ◽  
Jan P. Dekker ◽  
Arie van Hoek ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Photosystem Ii ◽  
Excitation Energy ◽  
Charge Separation ◽  
Excitation Energy Transfer

Linker proteins enable ultrafast excitation energy transfer in the phycobilisome antenna system of Thermosynechococcus vulcanus

2016 ◽  
Vol 15 (1) ◽  
pp. 31-44 ◽  
Author(s):  
C. Nganou ◽  
L. David ◽  
N. Adir ◽  
M. Mkandawire
Keyword(s):  
Energy Transfer ◽  
Excitation Energy ◽  
Excitation Energy Transfer ◽  
Antenna System ◽  
Kinetics Of

Comparison of kinetics of photoexcitation migration from PC620 to APC Core in extracted and intact pentacyclic phycobilisomes ofT. vulcanus. The extracted PBS does not have linker protein, while intact has them and they facilitate the migration.

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