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Zeitschrift für Naturforschung C

A Journal of Biosciences

Editor-in-Chief: Seibel, Jürgen

Editorial Board: Aigner , Achim / Boland, Wilhelm / Bornscheuer, Uwe / Hoffmann, Klaus

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1865-7125
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Volume 54, Issue 11

Issues

Effects of Antifungal Compounds on Conidial Germination and on the Induction of Appressorium Formation of Magnaporthe grisea

Frank Eilbert
  • Department for Biotechnology, University of Kaiserslautern, Paul-Ehrlich-Str. 23, D -67663 Kaiserslautern, Germany.
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/ Eckhard Thines
  • School of Biological Sciences, University of Exeter, Washington Singer Laboratories, Perry Road, Exeter EX4 4Q L , United Kingdom
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/ Heidrun Anke
  • Department for Biotechnology, University of Kaiserslautern, Paul-Ehrlich-Str. 23, D -67663 Kaiserslautern, Germany.
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Published Online: 2014-06-02 | DOI: https://doi.org/10.1515/znc-1999-1108

Abstract

Appressorium formation in germinating conidia of Magnaporthe grisea was induced on a hydrophilic (noninductive) surface by antifungal compounds. Respiratory inhibitors or un­ coupling agents such as strobilurins, antimycin A , myxothiazol, rotenone, pterulone A , and oligomycin A were particularly effective whereas sodium cyanide had no effect. Cyclosporin A was effective only at high concentrations. These differentiation-inducing effects were only observed at subfungicidal concentrations at which more than 50% of the germinating conidia formed appressoria. Cycloheximide, nystatin, amphotericin B, and papulacandin A did not induce appressoria. Different strains of M. grisea displayed the same overall response to the inhibitors, varying merely in the percentage of appressoria formed. A combination of the respiratory inhibitors with 2-phenyl-4H -1-benzopyran-4-one (flavone), diphenyleneiodonium (DPI), or salicylhydroxamic acid (SHAM), compounds which interfere with the cyanide-resistant respiration, resulted in a higher sensitivity of the strains towards the respiratory inhibitors, but had no effect on appressorium formation.

Keywords: Magnaporthe grisea; Pyricularia oryzae; Appressorium Formation; Antifungal Compounds; Alternative Oxidase; Respiratory Inhibitors

About the article

Received: 1999-05-05

Revised: 1999-05-19

Published Online: 2014-06-02

Published in Print: 1999-11-01


Citation Information: Zeitschrift für Naturforschung C, Volume 54, Issue 11, Pages 903–908, ISSN (Online) 1865-7125, ISSN (Print) 0939-5075, DOI: https://doi.org/10.1515/znc-1999-1108.

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© 1946 – 2014: Verlag der Zeitschrift für Naturforschung. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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