Luminescence of singlet oxygen in photosystem II complexes isolated from cyanobacterium Synechocystis sp. PCC6803 containing monovinyl or divinyl chlorophyll a

Tatsuya Tomo, Hayato Kusakabe, Ryo Nagao, Hisashi Ito, Ayumi Tanaka, Seiji Akimoto, Mamoru Mimuro, Shigetoshi Okazaki

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The luminescence spectrum of singlet oxygen produced upon excitation at 674 nm in the photochemically active photosystem II (PS II) complexes isolated from cyanobacterium Synechocystis sp. PCC 6803 containing different types of chlorophyll, i.e., monovinyl (wild-type) or divinyl (genetically modified) chlorophyll a. The yield of singlet oxygen, estimated using methylene blue as the standard, from the divinyl-chlorophyll PS II complex was more than five times greater than that from the monovinyl-chlorophyll PS II complex. These results are consistent with the observed difference in the sensitivity towards high intensity of light between the two cyanobacterial strains. The yield of singlet oxygen appeared to increase with the level of triplet chlorophyll, in the divinyl-chlorophyll PS II complex. This article is part of a Special Issue entitled: Photosynthesis Research for Sustainability: from Natural to Artificial.

Original languageEnglish
Pages (from-to)1299-1305
Number of pages7
JournalBiochimica et Biophysica Acta - Bioenergetics
Volume1817
Issue number8
DOIs
Publication statusPublished - Aug 2012

Keywords

  • Cyanobacterium
  • Divinyl chlorophyll
  • Photo inhibition
  • Photosystem
  • Singlet oxygen

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Cell Biology

Fingerprint Dive into the research topics of 'Luminescence of singlet oxygen in photosystem II complexes isolated from cyanobacterium Synechocystis sp. PCC6803 containing monovinyl or divinyl chlorophyll a'. Together they form a unique fingerprint.

  • Cite this