Involvement of uncoupled antenna chlorophylls in photoinhibition in thylakoids

Evidence is presented, by means of both fluorescence and action spectroscopy, that a small, spectroscopically heterogeneous population of both Chl a and Chl b molecules is present in isolated spinach thylakoids and is active in photoinhibition. The broadness of the action spectrum suggests that degr...

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Bibliographic Details
Published in:FEBS letters 2001-02, Vol.491 (1), p.109-113
Main Authors: Santabarbara, S., Neverov, K.V., Garlaschi, F.M., Zucchelli, G., Jennings, R.C.
Format: Article
Language:English
Subjects:
Action spectrum
Car, carotenoids
Chl, chlorophyll
Chlorophyll - metabolism
Chlorophyll A
DBMIB, 2-5-dibromo-6-isopropyl-3-methyl-1,4-benzoquinone
DCMU, 3-(3,4-dichlorophenyl)-1,1-dimethylurea
DNB, m-dinitrobenzene
Excited state quenching
Light
Light-Harvesting Protein Complexes
Mass Spectrometry
Photoinhibition
Photosynthetic Reaction Center Complex Proteins - metabolism
Plant Leaves - metabolism
Plant Leaves - physiology
PS I, photosystem I
PS II, photosystem II
Spectrometry, Fluorescence
Spinacia oleracea - metabolism
Spinacia oleracea - physiology
Thylakoid
Thylakoids - metabolism
Thylakoids - physiology
Uncoupled pigment
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Summary:Evidence is presented, by means of both fluorescence and action spectroscopy, that a small, spectroscopically heterogeneous population of both Chl a and Chl b molecules is present in isolated spinach thylakoids and is active in photoinhibition. The broadness of the action spectrum suggests that degraded or incompletely assembled pigment–protein complexes may be involved.
ISSN:0014-5793
1873-3468
DOI:10.1016/S0014-5793(01)02174-3