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Université de Fribourg

Linking comparative genomics of nine potato-associated pseudomonas isolates with their differing biocontrol potential against late blight

Vrieze, Mout De ; Varadarajan, Adithi R. ; Schneeberger, Kerstin ; Bailly, Aurélien ; Rohr, Rudolf P. ; Ahrens, Christian H. ; Weisskopf, Laure

In: Frontiers in Microbiology, 2020, vol. 11, p. 857

For plants, the advantages of associating with beneficial bacteria include plant growth promotion, reduction of abiotic and biotic stresses and enhanced protection against various pests and diseases. Beneficial bacteria rightly equipped for successful plant colonization and showing antagonistic activity toward plant pathogens seem to be actively recruited by plants. To gain more insights into...

Université de Fribourg

Pfm-like enzymes are a novel family of subclass b2 metallo-β-lactamases from Pseudomonas synxantha belonging to the Pseudomonas fluorescens complex

Poirel, Laurent ; Palmieri, Mattia ; Brilhante, Michael ; Masseron, Amandine ; Perreten, Vincent ; Nordmann, Patrice

In: Antimicrobial Agents and Chemotherapy, 2020, vol. 64, no. 2, p. -

A carbapenem-resistant Pseudomonas synxantha isolate recovered from chicken meat produced the novel carbapenemase PFM-1. That subclass B2 metallo-β- lactamase shared 71% amino acid identity with β-lactamase Sfh-1 from Serratia fonticola. The blaPFM-1 gene was chromosomally located and likely acquired. Variants of PFM-1 sharing 90% to 92% amino acid identity were identified in bacterial ...

Université de Fribourg

Biocontrol activity of three Pseudomonas in a newly assembled collection of Phytophthora infestans isolates

De Vrieze, Mout ; Gloor, Ramona ; Massana Codina, Josep ; Torriani, Stefano ; Gindro, Katia ; L?Haridon, Floriane ; Bailly, Aurélien ; Weisskopf, Laure

In: Phytopathology, 2019, vol. 109, no. 9, p. 1555–1565

Late blight caused by the oomycete Phytophthora infestans constitutes the greatest threat to potato production worldwide. Considering the increasing concerns regarding the emergence of novel fungicide-resistant genotypes and the general demand for reducing inputs of synthetic and copper-based fungicides, the need for alternative control methods is acute. Several bacterial antagonists have...

Université de Fribourg

ABCG36/PEN3/PDR8 Is an Exporter of the Auxin Precursor, Indole-3-Butyric Acid, and Involved in Auxin-Controlled Development

Aryal, Bibek ; Huynh, John ; Schneuwly, Jerôme ; Siffert, Alexandra ; Liu, Jie ; Alejandro, Santiago ; Ludwig-Müller, Jutta ; Martinoia, Enrico ; Geisler, Markus

In: Frontiers in Plant Science, 2019, vol. 10, p. -

The PDR-type ABCG transporter, ABCG36/PDR8/PEN3, is thought to be implicated in the export of a few structurally unrelated substrates, including the auxin precursor, indole-3-butyric acid (IBA), although a clear-cut proof of transport is lacking. An outward facing, lateral root (LR) location for ABCG36 fuelled speculations that it might secrete IBA into the rhizosphere. Here, we provide...

Università della Svizzera italiana

Opening study on the development of a new biosensor for metal toxicity based on pseudomonas fluorescens pyoverdine

Chiadò, Alessandro ; Varani, Luca ; Bosco, Francesco ; Marmo, Luca

In: Biosensors, 2013, vol. 3, no. 4, p. 385-399

To date, different kinds of biosensing elements have been used effectively for environmental monitoring. Microbial cells seem to be well-suited for this task: they are cheap, adaptable to variable field conditions and give a measurable response to a broad number of chemicals. Among different pollutants, heavy metals are still a major problem for the environment. A reasonable starting point...

Université de Fribourg

Combining different potato-associated pseudomonas strains for improved biocontrol of Phytophthora infestans

Vrieze, Mout De ; Germanier, Fanny ; Vuille, Nicolas ; Weisskopf, Laure

In: Frontiers in Microbiology, 2018, vol. 9, p. -

Late blight caused by Phytophthora infestans is considered as the most devastating disease of potato and is a re-emerging problem worldwide. Current late blight control practices rely mostly on synthetic fungicides or copper-based products, but growing awareness of the negative impact of these compounds on the environment has led to the search for alternative control measures. A collection of...