Université de Neuchâtel

The xenobiotic β-aminobutyric acid enhances Arabidopsis thermotolerance

Zimmerli, Laurent ; Hou, Bi-Huei ; Tsai, Chia-Hong ; Jakab, Gabor ; Mauch-Mani, Brigitte ; Somerville, Shauna

In: The Plant Journal, 2007, vol. 53, no. 4, p. 144-156

The non-protein amino acid β-aminobutyric acid (BABA) primes Arabidopsis to respond more quickly and strongly to pathogen and osmotic stress. Here, we report that BABA also significantly enhances acquired thermotolerance in Arabidopsis. This thermotolerance was dependent on heat shock protein 101, a critical component of the normal heat-shock response. BABA did not enhance basal thermotolerance...

Université de Neuchâtel

Interplay between JA, SA and ABA signalling during basal and induced resistance against Pseudomonas syringae and Alternaria brassicicola

Flors, Victor ; Ton, Jurriaan ; van Doorn, Ronald ; Jakab, Gabor ; García-Agustín, Pilar ; Mauch-Mani, Brigitte

In: The Plant Journal, 2007, vol. 54, no. 1, p. 81-92

We have examined the role of the callose synthase PMR4 in basal resistance and β-aminobutyric acid-induced resistance (BABA-IR) of Arabidopsis thaliana against the hemi-biotrophic pathogen Pseudomonas syringae and the necrotrophic pathogen Alternaria brassicicola. Compared to wild-type plants, the pmr4-1 mutant displayed enhanced basal resistance against P....

Université de Neuchâtel

Potentiation of pathogen-specific defense mechanisms in Arabidopsis by β-aminobutyric acid

Laurent Zimmerli ; Jakab, Gabor ; Métraux, Jean-Pierre ; Mauch-Mani, Brigitte

In: Proceedings of the National Academy of Sciences of the United States of America, 2000, vol. 97, no. 23, p. 12920-12925

The nonprotein amino acids γ-aminobutyric acid (GABA) and β-aminobutyric acid (BABA) have known biological effects in animals and plants. Their mode of action has been the object of thorough research in animals but remains unclear in plants. Our objective was to study the mode of action of BABA in the protection of Arabidopis plants against virulent pathogens. BABA protected...