Effect of UV-A radiation on photosynthetic electron transport

Turcsányi, Enikő and Vass, Imre: Effect of UV-A radiation on photosynthetic electron transport. Acta biologica Szegediensis, (46) 3-4. pp. 171-173. (2002)

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Abstract

We have studied the inhibition of photosynthetic electron transport by UV-A (320-400nm) radiation in isolated spinach thylakoids by flash-induced oxygen and thermoluminescence (TL) measurements. The flash pattern of oxygen evolution showed an increased amount of the S0 state in the dark, which indicate a direct effect of UV-A radiation in the water-oxidizing complex. TL measurements revealed the UV-A induced loss of PSII centers. Flash-induced oscillation of the B TL band, originating from the S2Q8 recombination, indicated a UV-A induced decrease in the amount of Q8 relative to Q8. In conclusion, our data show that UV-A radiation is highly damaging for PSII, whose electron transport is affected both at the water oxidizing complex, and the binding site of the Q8 quinone electron acceptor.

Item Type: Article
Event Title: Hungarian Congress on Plant Physiology, 7., 2002, Szeged
Journal or Publication Title: Acta biologica Szegediensis
Date: 2002
Volume: 46
Number: 3-4
Page Range: pp. 171-173
ISSN: 1588-385X
Language: angol
Heading title: Photosynthesis, the effects of UV-B irradiation; Proceedings of the 7th Hungarian Congress on Plant Physiology
Uncontrolled Keywords: Természettudomány, Biológia
Additional Information: Bibliogr.: 173. p.; Abstract
Date Deposited: 2016. Oct. 17. 09:25
Last Modified: 2018. May. 28. 11:31
URI: http://acta.bibl.u-szeged.hu/id/eprint/22547

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