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Université de Fribourg

Silica nanoparticles enhance disease resistance in Arabidopsis plants

El-Shetehy, Mohamed ; Moradi, Aboubakr ; Maceroni, Mattia ; Reinhardt, Didier ; Petri-Fink, Alke ; Rothen-Rutishauser, Barbara ; Mauch, Felix ; Schwab, Fabienne

In: Nature Nanotechnology, 2020, p. 1–10

In plants, pathogen attack can induce an immune response known as systemic acquired resistance that protects against a broad spectrum of pathogens. In the search for safer agrochemicals, silica nanoparticles (SiO2 NPs; food additive E551) have recently been proposed as a new tool. However, initial results are controversial, and the molecular mechanisms of SiO2 NP-induced disease resistance...

Université de Fribourg

Identification of a species-specific aminotransferase in Pediococcus acidilactici capable of forming α-aminobutyrate

Wenger, Alexander ; Schmidt, Remo S. ; Portmann, Reto ; Roetschi, Alexandra ; Eugster, Elisabeth ; Weisskopf, Laure ; Irmler, Stefan

In: AMB Express, 2020, vol. 10, no. 1, p. 100

During cheese ripening, the bacterial strain Pediococcus acidilactici FAM18098 produces the non-proteinogenic amino acid, α-aminobutyrate (AABA). The metabolic processes that lead to the biosynthesis of this compound are unknown. In this study, 10 P. acidilactici, including FAM18098 and nine Pediococcus pentosaceus strains, were screened for their ability to produce AABA. All P. acidilactici...

Université de Fribourg

A substrate of the ABC transporter PEN3 stimulates bacterial flagellin (flg22)-induced callose deposition in Arabidopsis thaliana

Matern, Andreas ; Böttcher, Christoph ; Eschen-Lippold, Lennart ; Westermann, Bernhard ; Smolka, Ulrike ; Döll, Stefanie ; Trempel, Fabian ; Aryal, Bibek ; Scheel, Dierk ; Geisler, Markus ; Rosahl, Sabine

In: Journal of Biological Chemistry, 2019, vol. 294, no. 17, p. 6857–6870

Nonhost resistance of Arabidopsis thaliana against Phytophthora infestans, a filamentous eukaryotic microbe and the causal agent of potato late blight, is based on a multilayered defense system. Arabidopsis thaliana controls pathogen entry through the penetration-resistance genes PEN2 and PEN3, encoding an atypical myrosinase and an ABC transporter, respectively, required for synthesis and...

Université de Fribourg

Intra and extracellular journey of the phytohormone salicylic acid

Maruri-López, Israel ; Aviles-Baltazar, Norma Yaniri ; Buchala, Antony J. ; Serrano, Mario

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

Salicylic acid (SA) is a plant hormone that has been described to play an essential role in the activation and regulation of multiple responses to biotic and to abiotic stresses. In particular, during plant-microbe interactions, as part of the defense mechanisms, SA is initially accumulated at the local infected tissue and then spread all over the plant to induce systemic acquired resistance...

Consortium of Swiss Academic Libraries

GABAA receptor diversity and pharmacology

Möhler, H.

In: Cell and Tissue Research, 2006, vol. 326, no. 2, p. 505-516