Université de Fribourg

Genome insights of the plant-growth promoting bacterium Cronobacter muytjensii JZ38 with volatile-mediated antagonistic activity against Phytophthora infestans

Eida, Abdul Aziz ; Bougouffa, Salim ; L’Haridon, Floriane ; Alam, Intikhab ; Weisskopf, Laure ; Bajic, Vladimir B. ; Saad, Maged M. ; Hirt, Heribert

In: Frontiers in Microbiology, 2020, vol. 11, p. 369

Salinity stress is a major challenge to agricultural productivity and global food security in light of a dramatic increase of human population and climate change. Plant growth promoting bacteria can be used as an additional solution to traditional crop breeding and genetic engineering. In the present work, the induction of plant salt tolerance by the desert plant endophyte Cronobacter sp. ...

Université de Fribourg

Map kinase phosphatase1 and protein tyrosine phosphatase1 are repressors of salicylic acid synthesis and snc1-mediated responses in Arabidopsis

Bartels, Sebastian ; Anderson, Jeffrey C. ; Besteiro González, Marina A. ; Carreri, Alessandro ; Hirt, Heribert ; Buchala, Antony J. ; Métraux, Jean-Pierre ; Peck, Scott C. ; Ulm, Roman

In: The Plant Cell, 2009, vol. 21, p. 2884-2897

Mitogen-activated protein (MAP) kinase phosphatases are important negative regulators of the levels and kinetics of MAP kinase activation that modulate cellular responses. The dual-specificity phosphatase MAP KINASE PHOSPHATASE1 (MKP1) was previously shown to regulate MAP KINASE6 (MPK6) activation levels and abiotic stress responses in Arabidopsis thaliana. Here, we report that the mkp1 null...

Université de Fribourg

The PP2C-type phosphatase AP2C1, which negatively regulates MPK4 and MPK6, modulates innate immunity, jasmonic acid, and ethylene levels in Arabidopsis

Schweighofer, Alois ; Kazanaviciute, Vaiva ; Scheikl, Elisabeth ; Teige, Markus ; Doczi, Robert ; Hirt, Heribert ; Schwanninger, Manfred ; Kant, Merijn ; Schuurink, Robert ; Mauch, Felix ; Buchala, Antony ; Cardinale, Francesca ; Meskiene, Irute

In: The Plant Cell, 2007, vol. 19, no. 7, p. 2213-2224

Wound signaling pathways in plants are mediated by mitogen-activated protein kinases (MAPKs) and stress hormones, such as ethylene and jasmonates. In Arabidopsis thaliana, the transmission of wound signals by MAPKs has been the subject of detailed investigations; however, the involvement of specific phosphatases in wound signaling is not known. Here, we show that AP2C1, an...