Effect of UV-A radiation on photosynthetic electron transport

Enikö Turcsányi, I. Vass

Research output: Contribution to journalArticle

16 Citations (Scopus)

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 thermolumniscence (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 S2QB- recombination, indicated a UV-A induced decrease in the amount of QB- relative to QB. 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 QB quinone electron acceptor.

Original languageEnglish
Pages (from-to)171-173
Number of pages3
JournalActa Biologica Szegediensis
Volume46
Issue number3-4
Publication statusPublished - 2002

Fingerprint

Electron Transport
electron transfer
Radiation
quinones
spinach
thylakoids
Oxygen
oscillation
binding sites
Thylakoids
Spinacia oleracea
Water
water
electrons
oxygen
Genetic Recombination
Binding Sites
Electrons
oxygen production

Keywords

  • Oxygen evolution
  • Photosystem II
  • Spinach
  • Thermoluminescence
  • UV-4 irradiation

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Cell Biology
  • Applied Microbiology and Biotechnology
  • Neuroscience(all)

Cite this

Effect of UV-A radiation on photosynthetic electron transport. / Turcsányi, Enikö; Vass, I.

In: Acta Biologica Szegediensis, Vol. 46, No. 3-4, 2002, p. 171-173.

Research output: Contribution to journalArticle

Turcsányi, Enikö ; Vass, I. / Effect of UV-A radiation on photosynthetic electron transport. In: Acta Biologica Szegediensis. 2002 ; Vol. 46, No. 3-4. pp. 171-173.
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