Université de Neuchâtel

Induction of systemic acquired resistance in Zea mays also enhances the plant’s attractiveness to parasitoids

Rostás, Michael ; Turlings, Ted C. J.

In: Biological Control, 2008, vol. 46, no. 2, p. 178-186

Plants under attack by caterpillars emit volatile compounds that attract the herbivore’s natural enemies. In maize, the caterpillar-induced production of volatiles involves the phytohormone jasmonic acid (JA). In contrast, pathogen attack usually up-regulates the salicylic acid (SA)-pathway and results in systemic acquired resistance (SAR) against plant diseases. Activation of the SA-pathway...

Université de Fribourg

Pseudomonas syringae Elicits Emission of the Terpenoid (E,E)-4,8,12-Trimethyl-1,3,7,11-Tridecatetraene in Arabidopsis Leaves Via Jasmonate Signaling and Expression of the Terpene Synthase TPS4

Attaran, Elham ; Rostás, Michael ; Zeier, Jürgen

In: Molecular Plant-Microbe Interactions, 2008, vol. 21, no. 11, p. 1482-1497

Volatile, low–molecular weight terpenoids have been implicated in plant defenses, but their direct role in resistance against microbial pathogens is not clearly defined. We have examined a possible role of terpenoid metabolism in the induced defense of Arabidopsis thaliana plants against leaf infection with the bacterial pathogen Pseudomonas syringae. Inoculation of plants with...

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...