The irreversible photoinhibition of the photosystem II complex in leaves of Vicia faba under strong light

É. Hideg, Norio Murata

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Exposure of the photosynthetic machinery to strong light causes the photoinhibition of the photosystem II complex. The recovery from the photoinhibition in vivo was characterized by monitoring the ratio of variable to maximum fluorescence (F(v)/F(m)) in detached leaves of broad bean (Vicia faba). The changes in the ratio were explained in terms of three components, namely, two saturating exponential components with half rise-times of about 15 and 120 min, respectively, and a non-recovery component. The non-recovery component increased gradually as the exposure to strong light was prolonged. Our results suggest that this irreversible component of the photoinhibition of the photosystem II complex was caused by severe stress due to strong light under which repair of the photosystem II complex was insufficient to allow full recovery. The irreversible photoinhibition is discussed in terms of both the physiology and ecology of plants.

Original languageEnglish
Pages (from-to)151-158
Number of pages8
JournalPlant Science
Volume130
Issue number2
DOIs
Publication statusPublished - Dec 22 1997

Fingerprint

Vicia faba
Photosystem II Protein Complex
photoinhibition
photosystem II
Light
Plant Physiological Phenomena
leaves
Recovery
Physiology
Ecology
plant ecology
Machinery
plant physiology
Repair
faba beans
Fluorescence
Monitoring
fluorescence
monitoring

Keywords

  • Chlorophyll fluorescence
  • Irreversible photoinhibition
  • Light stress

ASJC Scopus subject areas

  • Plant Science
  • Biochemistry
  • Biotechnology

Cite this

The irreversible photoinhibition of the photosystem II complex in leaves of Vicia faba under strong light. / Hideg, É.; Murata, Norio.

In: Plant Science, Vol. 130, No. 2, 22.12.1997, p. 151-158.

Research output: Contribution to journalArticle

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