, Volume 167, Issue 3, pp 376–381 | Cite as

The relationship between phosphate status and photosynthesis in leaves

Reversibility of the effects of phosphate deficiency on photosynthesis
  • K.-J. Dietz
  • C. Foyer


Spinach (Spinacia oleracea L.) and barley (Hordeum vulgare L.) were grown in hydroponic culture with varying levels of orthophosphate (Pi). When leaves were fed with 20 mmol·l−1 Pi at low CO2 concentrations, a temporary increase of CO2 uptake was observed in Pi-deficient leaves but not in those from plants grown at 1 mmol·l−1 Pi. At high concentrations of CO2 (at 21% or 2% O2) the Pi-induced stimulation of CO2 uptake was pronounced in the Pi-deficient leaves. The contents of phosphorylated metabolites in the leaves decreased as a result of Pi deficiency but were restored by Pi feeding. These results demonstrate that there is an appreciable capacity for rapid Pi uptake by leaf mesophyll cells and show that the effects of long-term phosphate deficiency on photosynthesis may be reversed (at least temporarily) within minutes by feeding with Pi.

Key words

Hordeum (phosphate, photosynthesis) Orthophosphate (deficiency, photosynthesis) Photosynthesis (phosphate status) Spinacia (phosphate, photosynthesis) 





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Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • K.-J. Dietz
    • 1
  • C. Foyer
    • 2
  1. 1.Institut für BotanikUniversität Würzburg, Lehrstuhl Botanik 1WürzburgFederal Republic of Germany
  2. 2.Research Institute for Photosynthesis, Department of BotanyUniversity of SheffieldSheffieldUK

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