Photosynthetica 2018, 56(1):265-274 | DOI: 10.1007/s11099-018-0779-7

The phycobilisome terminal emitter transfers its energy with a rate of (20 ps)-1 to photosystem II

A. M. Acuña1, P. Van Alphen2, R. Van Grondelle1, I. H. M. Van Stokkum1,*
1 Institute for Lasers, Life and Biophotonics, Faculty of Sciences, Vrije Universiteit Amsterdam, Amsterdam, The Netherlands
2 Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam, The Netherlands

Ultrafast time resolved emission spectra were measured in whole cells of a PSI-deficient mutant of Synechocystis sp. PCC 6803 at room temperature and at 77K to study excitation energy transfer and trapping. By means of a target analysis it was estimated that the terminal emitter of the phycobilisome, termed allophycocyanin 680, transfers its energy with a rate of (20 ps)-1 to PSII. This is faster than the intraphycobilisome energy transfer rates between a rod and a core cylinder, or between the core cylinders.

Keywords: excitation energy transfer; global analysis; light harvesting; target analysis

Received: June 14, 2017; Accepted: August 15, 2017; Published: March 1, 2018Show citation

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Acuña, A.M., Alphen, P., Grondelle, R., & Stokkum, I.H.M. (2018). The phycobilisome terminal emitter transfers its energy with a rate of (20 ps)-1 to photosystem II. Photosynthetica, 56(1), 265-274. doi: 10.1007/s11099-018-0779-7.
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