The quenching of photosystem II fluorescence does not protect the D1 protein against light induced degradation in thylakoids.
In spinach thylakoids, the quenching of the singlet excited state in the photosystem II antenna by m-dinitrobenzene does not change the rate of the light induced degradation of the D1 reaction centre protein and offers only limited protection against photoinhibition itself. These results are discussed in terms of the role of non-photochemical quenching as a photoprotective strategy.
Santabarbara
S
S
Dipartmento di Biologia, Università di Milano, Milan, Italy.
Barbato
R
R
Zucchelli
G
G
Garlaschi
F M
FM
Jennings
R C
RC
D004136:Dinitrobenzenes / Q000737:chemistry; D005453:Fluorescence; D015151:Immunoblotting; D008027:Light; D010777:Photochemistry; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry / Q000276:immunology / Q000378:metabolism*; D045332:Photosystem II Protein Complex; D018724:Spinacia oleracea / Q000737:chemistry; D020524:Thylakoids / Q000737:chemistry* / Q000378:metabolism
D004136:Dinitrobenzenes; D045322:Photosynthetic Reaction Center Complex Proteins; D045332:Photosystem II Protein Complex; C017906:3-dinitrobenzene