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Current Microbiology

, Volume 20, Issue 2, pp 121–124 | Cite as

Suppression ofSeptoria tritici by Phenazine- or Siderophore-deficient mutants ofPseudomonas

  • Moshe Flaishman
  • Zahir Eyal
  • Christophe Voisard
  • Dieter Haas
Article

Abstract

Pseudomonas aeruginosa LEC1, a soil isolate from Israel, suppressed septoria tritici blotch of wheat caused bySeptoria tritici. Tn5-751 insertion mutagenesis of strain LEC1 produced one pyoverdine-negative (pvd) and three different pyocyanine-deficient (pcy) mutants. The nonfluorescentpvd mutant, like the wild-type, inhibited growth ofS. tritici on different solid media and suppressed the formation of pycnidia on wheat leaves. In contrast, thepcy mutants had lost part of the inhibitory activity in vitro and also part of the suppressive ability in vivo. It is suggested that antibiosis plays an important role in the suppression of septoria tritici blotch of wheat.

Keywords

Inhibitory Activity Pseudomonas Pseudomonas Aeruginosa Solid Medium Phenazine 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag New York Inc. 1990

Authors and Affiliations

  • Moshe Flaishman
    • 2
  • Zahir Eyal
    • 2
  • Christophe Voisard
    • 1
  • Dieter Haas
    • 1
  1. 1.Department of MicrobiologySwiss Federal Institute of TechnologyZurichSwitzerland
  2. 2.Department of botany, The George S. Wise Faculty of Life ScienceTel Aviv UniversityTel AvivIsrael

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