Effect of peptones on the ability of plant pathogenic bacteria to grow on media supplemented with copper sulphate

  • D.A. Cornish The New Zealand Institute for Plant & Food Research Limited, Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand
  • M.M. Schipper The New Zealand Institute for Plant & Food Research Limited, Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand
  • J.M. Oldham The New Zealand Institute for Plant & Food Research Limited, Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand
  • J.L. Vanneste The New Zealand Institute for Plant & Food Research Limited, Ruakura Research Centre, Private Bag 3123, Hamilton 3240, New Zealand
Keywords: Pseudomonas syringae pv actinidiae, Pseudomonas syringae, copper resistance, ammonium sulphate, bacterial canker of kiwifruit

Abstract

The extensive use of copper compounds for control of bacterial plant pathogens could lead to selecting strains of the pathogens that are copper-resistant. The ability to grow on a medium supplemented with copper, and therefore the concentration of copper to which bacterial strains are resistant, depends on the composition of the medium used for the test. The effects of different peptones (casitone and proteose peptone No. 3) and different media on the ability of strains of Pseudomonas syringae to grow in presence of copper were determined. Similar results were obtained when casitone was substituted with proteose peptone No. 3 in casitone yeast extract medium, but not when those two peptones were interchanged in King’s B medium. In water, casitone allowed strains of P. syringae pv. actinidiae (Psa) to grow in the presence of higher amounts of copper than proteose peptone No. 3 did. In all cases, resistance to copper was increased with increased peptone concentration.

Published
2017-07-26
How to Cite
Cornish, D., Schipper, M., Oldham, J., & Vanneste, J. (2017). Effect of peptones on the ability of plant pathogenic bacteria to grow on media supplemented with copper sulphate. New Zealand Plant Protection, 70, 265-271. https://doi.org/10.30843/nzpp.2017.70.60
Section
Vol 70 Kiwifruit & Grape Pathology 2017