Skip to main content
NCBI home page
Plant Physiology logoLink to Plant Physiology
. 1970 May;45(5):594–597. doi: 10.1104/pp.45.5.594

Biphasic Inhibition of Photosynthesis in Powdery Mildewed Barley 1

H H Edwards a,2
PMCID: PMC396468  PMID: 5429351

Abstract

A careful restudy of the photosynthetic process of barley (Hordeum vulgare) infected with powdery mildew (Erysiphe graminis f. sp. hordei) is reported. Unlike previous reports, which indicated a stimulation in infected host tissue photosynthesis during early stages of the disease followed by a rapid decline in activity, this study observed no stimulation but instead a biphasic inhibition in infected host photosynthesis under physiological concentrations of CO2. Under high CO2 (1.0%) a stimulation was observed during early stages of infection. The inhibition in low CO2 and stimulation in high CO2 of infected host photosynthesis was shown to occur in healthy host tissue when in the presence of 10−2m α-hydroxy-2-pyridinemethanesulfonic acid. The possible significance of these similar results is discussed.

Full text

PDF
594

Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Bushnell W. R., Allen P. J. Induction of Disease Symptoms in Barley by Powdery Mildew. Plant Physiol. 1962 Jan;37(1):50–59. doi: 10.1104/pp.37.1.50. [DOI] [PMC free article] [PubMed] [Google Scholar]
  2. Bushnell W. R., Allen P. J. Respiratory changes in barley leaves produced by single colonies of powdery mildew. Plant Physiol. 1962 Nov;37(6):751–758. doi: 10.1104/pp.37.6.751. [DOI] [PMC free article] [PubMed] [Google Scholar]
  3. Edwards H. H., Allen P. J. Distribution of the Products of Photosynthesis between Powdery Mildew and Barley. Plant Physiol. 1966 Apr;41(4):683–688. doi: 10.1104/pp.41.4.683. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Masri S. S., Ellingboe A. H. Primary infection of wheat and barley by Erysiphe graminis. Phytopathology. 1966 Apr;56(4):389–395. [PubMed] [Google Scholar]
  5. Scott K. J., Smillie R. M. Metabolic regulation in diseased leaves. I. The respiratory rise in barley leaves infected with powdery mildew. Plant Physiol. 1966 Feb;41(2):289–297. doi: 10.1104/pp.41.2.289. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. ZELITCH I. THE RELATION OF GLYCOLIC ACID SYNTHESIS TO THE PRIMARY PHOTOSYNTHETIC CARBOXYLATION REACTION IN LEAVES. J Biol Chem. 1965 May;240:1869–1876. [PubMed] [Google Scholar]

Articles from Plant Physiology are provided here courtesy of Oxford University Press

RESOURCES