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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

The Role of Indole and Other Shikimic Acid Derived Maize Volatiles in the Attraction of Two Parasitic Wasps

D'Alessandro, Marco ; Held, Matthias ; Triponez, Yann ; Turlings, Ted C. J.

In: Journal of Chemical Ecology, 2006, vol. 32, no. 2, p. 2733-2748

After herbivore attack, plants release a plethora of different volatile organic compounds (VOCs), which results in odor blends that are attractive to predators and parasitoids of these herbivores. VOCs in the odor blends emitted by maize plants (Zea mays) infested by lepidopteran larvae are well characterized. They are derived from at least three different biochemical pathways, but the...

Université de Neuchâtel

Assessing the importance of specific volatile organic compounds in multitrophic interactions

D'Alessandro, Marco ; Turlings, Théodoor (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2006 ; 1910.

Plants interact with a multitude of beneficial and harmful organisms of different trophic levels and it is generally accepted that such multitrophic interactions are highly relevant for various defence responses in plants. One of the most intriguing responses in plants is induced by herbivore feeding and results in the release of large amounts of volatile organic compounds (VOCs). These...

Université de Neuchâtel

In Situ Modification of Herbivore-Induced Plant Odors : A Novel Approach to Study the Attractiveness of Volatile Organic Compounds to Parasitic Wasps

D'Alessandro, Marco ; Turlings, Ted C. J.

In: Chemical Senses, 2005, vol. 30, p. 739-753

Many parasitic wasps (parasitoids) exploit volatile organic compounds (VOCs) emitted by herbivore-infested plants in order to locate their hosts, but it remains largely unknown which specific compounds within the volatile blends elicit the attractiveness to parasitoids. One way of studying the importance of specific VOCs is to test the attractiveness of odor blends from which certain compounds...