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Université de Neuchâtel

Signal signature of aboveground-induced resistance upon belowground herbivory in maize

Erb, Matthias ; Flors, Victor ; Karlen, Danielle ; de Lange, Elvira S. ; Planchamp, Chantal ; D’Alessandro, Marco ; Turlings, Ted C. J. ; Ton, Jurriaan

In: The Plant Journal, 2009, vol. 59, no. 2, p. 292-302

Plants activate local and systemic defence mechanisms upon exposure to stress. This innate immune response is partially regulated by plant hormones, and involves the accumulation of defensive metabolites. Although local defence reactions to herbivores are well studied, less is known about the impact of root herbivory on shoot defence. Here, we examined the effects of belowground infestation by...

Université de Neuchâtel

Enhancing Arabidopsis Salt and Drought Stress Tolerance by Chemical Priming for Its Abscisic Acid Responses

Jakab, Gabor ; Ton, Jurriaan ; Flors, Victor ; Zimmerli, Laurent ; Métraux, Jean-Pierre ; Mauch-Mani, Brigitte

In: Plant Physiology, 2005, vol. 139, p. 267-274

Drought and salt stress tolerance of Arabidopsis (Arabidopsis thaliana) plants increased following treatment with the nonprotein amino acid -aminobutyric acid (BABA), known as an inducer of resistance against infection of plants by numerous pathogens. BABA-pretreated plants showed earlier and higher expression of the salicylic acid-dependent PR-1 and PR-5 and the abscisic...

Université de Neuchâtel

Dissecting the ß-Aminobutyric Acid–Induced Priming Phenomenon in Arabidopsis

Ton, Jurriaan ; Jakab, Gabor ; Toquin, Valérie ; Flors, Victor ; Iavicoli, Annalisa ; Maeder, Muriel N. ; Métraux, Jean-Pierre ; Mauch-Mani, Brigitte

In: The Plant Cell, 2005, vol. 17, no. 3, p. 987-999

Plants treated with the nonprotein amino acid ß-aminobutyric acid (BABA) develop an enhanced capacity to resist biotic and abiotic stresses. This BABA-induced resistance (BABA-IR) is associated with an augmented capacity to express basal defense responses, a phenomenon known as priming. Based on the observation that high amounts of BABA induce sterility in Arabidopsis thaliana, a...

Université de Neuchâtel

Priming: Getting Ready for Battle

Conrath, Uwe ; Beckers, Gerold J. M. ; Flors, Victor ; García-Agustín, Pilar ; Jakab, Gábor ; Mauch, Felix ; Newman, Mari-Anne ; Pieterse, Corné M. J. ; Poinssot, Benoit ; Pozo, María J. ; Pugin, Alain ; Schaffrath, Ulrich ; Ton, Jurriaan ; Wendehenne, David ; Zimmerli, Laurent ; Mauch-Mani, Brigitte

In: Molecular Plant-Microbe Interactions, 2006, vol. 19, no. 10, p. 1062-1071

Infection of plants by necrotizing pathogens or colonization of plant roots with certain beneficial microbes causes the induction of a unique physiological state called “ priming”. The primed state can also be induced by treatment of plants with various natural and synthetic compounds. Primed plants display either faster, stronger, or both activation of the various cellular defense responses...

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

The multifaceted role of ABA in disease resistance

Ton, Jurriaan ; Flors, Victor ; Mauch-Mani, Brigitte

In: Trends in Plant Science, 2009, vol. 14, no. 6, p. 310-317

Long known only for its role in abiotic stress tolerance, recent evidence shows that abscisic acid (ABA) also has a prominent role in biotic stress. Although it acts as a negative regulator of disease resistance, ABA can also promote plant defense and is involved in a complicated network of synergistic and antagonistic interactions. Its role in disease resistance depends on the type of pathogen,...

Université de Neuchâtel

Priming by airborne signals boosts direct and indirect resistance in maize

Ton, Jurriaan ; D'Alessandro, Marco ; Jourdie, Violaine ; Jakab, Gabor ; Karlen, Danielle ; Held, Matthias ; Mauch-Mani, Brigitte ; Turlings, Ted C. J.

In: The Plant Journal, 2007, vol. 49, no. 1, p. 16-26

Plants counteract attack by herbivorous insects using a variety of inducible defence mechanisms. The production of toxic proteins and metabolites that instantly affect the herbivore's development are examples of direct induced defence. In addition, plants may release mixtures of volatile organic compounds (VOCs) that indirectly protect the plant by attracting natural enemies of the herbivore....

Université de Neuchâtel

Fungal Infection Reduces Herbivore-Induced Plant Volatiles of Maize but does not Affect Naïve Parasitoids

Rostás, Michael ; Ton, Jurriaan ; Mauch-Mani, Brigitte ; Turlings, Ted C. J.

In: Journal of Chemical Ecology, 2006, vol. 32, no. 9, p. 1897-1909

Plants attacked by insects release volatile compounds that attract the herbivores' natural enemies. This so-called indirect defense is plastic and may be affected by an array of biotic and abiotic factors. We investigated the effect of fungal infection as a biotic stress agent on the emission of herbivore-induced volatiles and the possible consequences for the attraction of two parasitoid...