Accéder directement au contenu Accéder directement à la navigation
Article dans une revue

Does the latent period of leaf-fungal pathogens reflect their trophic type? A meta-analysis of biotrophs, hemibiotrophs, and necrotrophs

Abstract : We performed a meta-analysis to search for a relation between the trophic type and latent period of fungal pathogens. The pathogen incubation period and the level of resistance of the hosts were also investigated. This ecological knowledge would help us to more efficiently regulate crop epidemics for different types of pathogens. We gathered latent period data from 103 studies dealing with 51 fungal pathogens of the three major trophic types (25 biotrophs, 15 hemibiotrophs, and 11 necrotrophs), representing 2,542 mean latent periods. We show that these three trophic types display significantly different latent periods. Necrotrophs exhibited the shortest latent periods (<100 degree-days [DD]), biotrophs had intermediate ones (between 100 and 200 DD), and hemibiotrophs had the longest latent periods (>200 DD). We argue that this relation between trophic type and latent period points to two opposing host exploitation strategies: necrotrophs mount a rapid destructive attack on the host tissue, whereas biotrophs and hemibiotrophs avoid or delay the damaging phase. We query the definition of hemibiotrophic pathogens and discuss whether the length of the latent period is determined by the physiological limits inherent to each trophic type or by the adaptation of pathogens of different trophic types to the contrasting conditions experienced in their interaction with the host.
Type de document :
Article dans une revue
Liste complète des métadonnées

https://hal.inrae.fr/hal-02867921
Déposant : Anaïs Durivault <>
Soumis le : lundi 15 juin 2020 - 10:38:16
Dernière modification le : mardi 30 juin 2020 - 13:56:02

Lien texte intégral

Identifiants

Citation

Pierre-Antoine Précigout, David Claessen, David Makowski, Corinne Robert. Does the latent period of leaf-fungal pathogens reflect their trophic type? A meta-analysis of biotrophs, hemibiotrophs, and necrotrophs. Phytopathology, American Phytopathological Society, 2020, 110 (2), pp.345-361. ⟨10.1094/PHYTO-04-19-0144-R⟩. ⟨hal-02867921⟩

Partager

Métriques

Consultations de la notice

28