Effects of two sterol biosynthesis inhibitor fungicides (fenpropimorph and fenhexamid) on the development of an arbuscular mycorrhizal fungus - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Mycological Research Année : 2008

Effects of two sterol biosynthesis inhibitor fungicides (fenpropimorph and fenhexamid) on the development of an arbuscular mycorrhizal fungus

Domenico Zocco
  • Fonction : Auteur
Evgenia Lozanova
  • Fonction : Auteur
Laurent Renard
  • Fonction : Auteur
Céline Bivort
  • Fonction : Auteur
Stéphane Declerck
  • Fonction : Auteur

Résumé

The effects of different concentrations (0.2, 2, 20, 200 mg l−1) of two sterol biosynthesis inhibitor (SBI) fungicides, i.e. fenpropimorph and fenhexamid, were evaluated on the spore germination, germ tube elongation, sporulation, and root colonization of Glomus intraradices grown monoxenically in association with transformed carrot roots. The percentage of germinated spores incubated on the SBI fungicides and the length of the germ tubes decreased with increasing concentrations of both fungicides. However, for spore germination this impact was fungistatic rather than fungicidal. Extraradical mycelium architecture and spore production in contact with the SBI fungicides were also strongly impacted at high concentration (20 mg l−1). Conversely, the colonization of roots developing in the fungicide-free compartment, but interconnected with the extraradical mycelium developing on the SBI fungicides, appeared unaffected. Our results demonstrated that the monoxenic culture system could be used as a standardized, reproducible technique to compare the impacts of different molecules on arbuscular mycorrhizal fungi, and for the initial screening of new candidate molecules before registration.

Dates et versions

hal-04322631 , version 1 (05-12-2023)

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Citer

Domenico Zocco, Evgenia Lozanova, Laurent Renard, Céline Bivort, Roger Durand, et al.. Effects of two sterol biosynthesis inhibitor fungicides (fenpropimorph and fenhexamid) on the development of an arbuscular mycorrhizal fungus. Mycological Research, 2008, 112 (5), pp.592-601. ⟨10.1016/j.mycres.2007.11.010⟩. ⟨hal-04322631⟩
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