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Time‐resolved ultrafast blue‐shifted fluorescence from pea chloroplasts
Author(s) -
McCauley Steven W.,
Bittersmann Edith,
Holzwarth Alfred R.
Publication year - 1989
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(89)80642-8
Subject(s) - exciton , fluorescence , ultrashort pulse , kinetics , chloroplast , photochemistry , antenna (radio) , chemistry , analytical chemistry (journal) , molecular physics , optics , physics , telecommunications , laser , chromatography , quantum mechanics , computer science , gene , biochemistry
The antenna chlorophylls in higher plants can produce fluorescence that is blue‐shifted (anti‐Stokes‐shifted) relative to the exciting light. Global analysis of the time‐resolved fluorescence spectra resolves an ultrafast fluorescence emission component with a lifetime of about 15 ps which is attributed to exciton equilibration in the antenna. These results support the hypothesis that the overall exciton decay kinetics in PS I and PS II is trap‐limited as suggested by us earlier.