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| Maupetit, Agathe; Larbat, Romain; Pernaci, Michaël; Andrieux, Axelle; Guinet, Cécile; Boutigny, Anne-laure; Fabre, Bénédicte; Frey, Pascal; Halkett, Fabien. |
| Foliar pathogens face heterogeneous environments depending on the maturity of leaves they interact with. In particular, nutrient availability as well as defense levels may vary significantly, with opposing effects on the success of infection. The present study tested which of these factors have a dominant effect on the pathogen’s development. Poplar leaf disks of eight maturity levels were inoculated with the poplar rust fungus Melampsora larici-populina using an innovative single-spore inoculation procedure. A set of quantitative fungal traits (infection efficiency, latent period, uredinia size, mycelium quantity, sporulation rate, sporulation capacity, and spore volume) was measured on each infected leaf disk. Uninfected parts of the leaves were analyzed... |
| Tipo: Text |
Palavras-chave: Constitutive defense; Aggressiveness traits; Plasticity; Nutrient availability; Rust fungus. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00652/76405/77443.pdf |
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| Maupetit, Agathe; Fabre, Bénédicte; Pétrowski, Jérémy; Andrieux, Axelle; De Mita, Stéphane; Frey, Pascal; Halkett, Fabien; Hayden, Katherine. |
| Crop varieties carrying qualitative resistance to targeted pathogens lead to strong selection pressure on parasites, often resulting in resistance breakdown. It is well known that qualitative resistance breakdowns modify pathogen population structure but few studies have analysed the consequences on their quantitative aggressiveness‐related traits. The aim of this study was to characterize the evolution of these traits following a resistance breakdown in the poplar rust fungus, Melampsora larici‐populina. We based our experiment on three temporal populations sampled just before the breakdown event, immediately after and four years later. First, we quantified phenotypic differences among populations for a set of aggressiveness traits on a universally... |
| Tipo: Text |
Palavras-chave: Disease-associated traits; Heritability; Mixed model; Plant pathogen; Q(ST)-F(ST)comparisons; Temporal sampling. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00652/76396/77420.pdf |
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