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Proceedings Paper

Picosecond Fluorescence In Spinach Chloroplasts
Author(s): Douglas Magde; Sylvia J. Berens; Warren L. Butler
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Paper Abstract

Fluorescence decay measurements using a mode-locked argon laser and single photon time-correlated detection, help us understand energy migration in photosynthesis. For intact spinach chloroplasts we find multiple exponential decays. There is some hint of a very fast component (<100 ps), but our data reveal little about it. We would expect this to be due to "photosystem I units." In addition we find two components at longer times, both of which lengthen as conditions are changed from "open" reaction centers (0.1 and 0.7 ns) to "closed" reac-tion centers (1 and 2 ns). This may reflect two kinds of organization for "photosystem II units."

Paper Details

Date Published: 23 April 1982
PDF: 7 pages
Proc. SPIE 0322, Picosecond Lasers and Applications, (23 April 1982); doi: 10.1117/12.933210
Show Author Affiliations
Douglas Magde, University of California/San Diego (United States)
Sylvia J. Berens, University of California/San Diego (United States)
Warren L. Butler, University of California/San Diego (United States)

Published in SPIE Proceedings Vol. 0322:
Picosecond Lasers and Applications
Lawrence S. Goldberg, Editor(s)

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