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Université de Fribourg

Endophytes and epiphytes from the grapevine leaf microbiome as potential biocontrol agents against phytopathogens

Bruisson, Sébastien ; Zufferey, Mónica ; L’Haridon, Floriane ; Trutmann, Eva ; Anand, Abhishek ; Dutartre, Agnès ; Vrieze, Mout De ; Weisskopf, Laure

In: Frontiers in Microbiology, 2019, vol. 10, p. -

Plants harbor diverse microbial communities that colonize both below-ground and above-ground organs. Some bacterial members of these rhizosphere and phyllosphere microbial communities have been shown to contribute to plant defenses against pathogens. In this study, we characterize the pathogen-inhibiting potential of 78 bacterial isolates retrieved from endophytic and epiphytic communities...

Université de Neuchâtel

BABA in priming tomato for enhanced tolerance to drought, salinity and fungal stress and combinations thereof

Ben Rejeb, Ines ; Mauch-Mani, Brigitte (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2018.

Tomatoes are among the most produced and consumed vegetable-fruit in many countries and is considered an economically important crop. However, drought, salinity and pathogen infection are the main causes of crop yield reduction and variability. Although plants have developed defensive capacities against these stresses, but plant tolerance and resistance depend on the degree and intensity of...

Université de Fribourg

The nitrogen availability interferes with mycorrhiza-induced resistance against Botrytis cinerea in Tomato

Sanchez-Bel, Paloma ; Troncho, Pilar ; Gamir, Jordi ; Pozo, Maria J. ; Camañes, Gemma ; Cerezo, Miguel ; Flors, Víctor

In: Frontiers in Microbiology, 2016, vol. 7, p. -

Mycorrhizal plants are generally quite efficient in coping with environmental challenges. It has been shown that the symbiosis with arbuscular mycorrhizal fungi (AMF) can confer resistance against root and foliar pathogens, although the molecular mechanisms underlying such mycorrhiza-induced resistance (MIR) are poorly understood. Tomato plants colonized with the AMF Rhizophagus irregularis...

Université de Fribourg

The novel elicitor AsES triggers a defense response against Botrytis cinerea in Arabidopsis thaliana

Hael-Conrad, V. ; Abou-Mansour, Eliane ; Díaz-Ricci, J.-C. ; Métraux, Jean-Pierre ; Serrano, Mario

In: Plant Science, 2015, vol. 241, p. 120–127

AsES (Acremonium strictum Elicitor and Subtilisin) is a novel extracellular elicitor protein produced by the avirulent isolate SS71 of the opportunist strawberry fungal pathogen A. strictum. Here we describe the activity of AsES in the plant-pathogen system Arabidopsis thaliana–Botrytis cinerea. We show that AsES renders A. thaliana plants resistant to the necrotrophic pathogen B. cinerea, both...

Université de Fribourg

The microbiome of the leaf surface of Arabidopsis protects against a fungal pathogen

Ritpitakphong, Unyarat ; Falquet, Laurent ; Vimoltust, Artit ; Berger, Antoine ; Métraux, Jean-Pierre ; L'Haridon, Floriane

In: New Phytologist, 2016, p. -

We have explored the importance of the phyllosphere microbiome in plant resistance in the cuticle mutants bdg (BODYGUARD) or lacs2.3 (LONG CHAIN FATTY ACID SYNTHASE 2) that are strongly resistant to the fungal pathogen Botrytis cinerea. The study includes infection of plants under sterile conditions, 16S ribosomal DNA sequencing of the phyllosphere microbiome, and isolation and high coverage...

Université de Fribourg

The cuticle and plant defense to pathogens

Metraux, Jean-Pierre ; Serrano, Mario ; Torres, Martha ; Coluccia, Fania ; L’Haridon, Floriane

In: Frontiers in Plant Science, 2014, vol. 5, p. 274

The cuticle provides a physical barrier against water loss and protects against irradiation, xenobiotics and pathogens. Components of the cuticle are perceived by invading fungi and activate developmental processes during pathogenesis. In addition, cuticle alterations of various types induce a syndrome of reactions that often results in resistance to necrotrophs. This article reviews the current...