Photoinhibition of photosynthesis during rain treatment

Identification of the intersystem electron-transfer chain as the site of inhibition

Momoe Ishibashi, Kintake Sonoike, Akira Watanabe

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Continuous wetness of leaves in the light causes a reduction in the carbon exchange rate (CER) in Phaseolus vulgaris L. [Ishibashi and Terashima (1995) Plant Cell Environ. 18: 431]. In this study, we investigated the initial cause of photoinhibition upon application of water, designated rain treatment, and we found a large decrease in the rate of electron transport through the whole chain from water to methyl viologen via PSII and PSI. In spite of the decrease in the rate of electron transport, there was no decrease in the activity of either PSI or PSII when these activities were measured separately. The intactness of PSI was also confirmed by the absence of any change in the photooxidizable amount of P-700, the reaction centre of PSI, and the intactness of PSII was confirmed by measurements of Chl fluorescence. The results suggest that the inhibition by the rain treatment, which occurs at the site between PSI and PSII, might be a novel type of photoinhibition, unlike the conventional types of photoinhibition that involve PSI and PSII.

Original languageEnglish
Pages (from-to)168-172
Number of pages5
JournalPlant and Cell Physiology
Volume38
Issue number2
Publication statusPublished - 1997 Feb
Externally publishedYes

Fingerprint

Rain
electron transport chain
Photosynthesis
photoinhibition
Electron Transport
photosynthesis
Electrons
rain
electron transfer
Paraquat
Phaseolus
Water
Plant Cells
Carbon
paraquat
Fluorescence
Light
Phaseolus vulgaris
fluorescence
carbon

Keywords

  • Electron transport
  • Environmental stress
  • Leaf wetness
  • Phaseolus vulgaris L.
  • Photoinhibition
  • Photosynthesis

ASJC Scopus subject areas

  • Plant Science
  • Cell Biology
  • Physiology

Cite this

Photoinhibition of photosynthesis during rain treatment : Identification of the intersystem electron-transfer chain as the site of inhibition. / Ishibashi, Momoe; Sonoike, Kintake; Watanabe, Akira.

In: Plant and Cell Physiology, Vol. 38, No. 2, 02.1997, p. 168-172.

Research output: Contribution to journalArticle

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