Planta

, Volume 156, Issue 3, pp 199–206

Effects of water stress on photosynthetic electron transport, photophosphorylation, and metabolite levels of Xanthium strumarium mesophyll cells

  • Thomas D. Sharkey
  • Murray R. Badger
Article
  • 105 Downloads

Abstract

Several component processes of photosynthesis were measured in osmotically stressed mesophyll cells of Xanthium strumarium L. The ribulose-1,5-bisphosphate regeneration capacity was reduced by water stress. Photophoshorylation was sensitive to water stress but photosynthetic electron transport was unaffected by water potentials down to-40 bar (-4 MPa). The concentrations of several intermediates of the photosynthetic carbon-reduction cycle remained relatively constant and did not indicate that ATP supply was limiting photosynthesis in the water-stressed cells.

Key words

Carbon reduction cycle intermediates Cells (isolated) Electron transport Photophosphorylation Photosynthesis (water stress) Water stress Xanthium 

Abbreviations

Hepes

4-(2-hydroxyethyl)-1-piperazinepropanesulfonic acid

PGA

3-phosphoglyceric acid

RuBP

ribulose-1,5-bisphosphate

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Copyright information

© Springer-Verlag 1982

Authors and Affiliations

  • Thomas D. Sharkey
    • 1
  • Murray R. Badger
    • 1
  1. 1.Department of Environmental Biology, Research School of Biological SciencesAustralian National UniversityCanberra CityAustralia
  2. 2.Desert Research InstituteUniversity of NevadaRenoUSA

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