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Université de Fribourg

Induced jasmonate signaling leads to contrasting effects on root damage and herbivore performance

Lu, Jing ; Robert, Christelle Aurélie Maud ; Riemann, Michael ; Cosme, Marco ; Mène-Saffrané, Laurent ; Massana, Josep ; Stout, Michael Joseph ; Lou, Yonggen ; Gershenzon, Jonathan ; Erb, Matthias

In: Plant Physiology, 2015, vol. 167, no. 3, p. 1100–1116

Induced defenses play a key role in plant resistance against leaf feeders. However, very little is known about the signals that are involved in defending plants against root feeders and how they are influenced by abiotic factors. We investigated these aspects for the interaction between rice (Oryza sativa) and two root-feeding insects: the generalist cucumber beetle (Diabrotica balteata) and the...

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

The role of abscisic acid and water stress in root herbivore-induced leaf resistance

Erb, Matthias ; Köllner, Tobias G. ; Degenhardt, Jörg ; Zwahlen, Claudia ; Hibbard, Bruce E. ; Turlings, Ted C. J.

In: New Phytologist, 2011, vol. 189, no. 1, p. 308-320

Herbivore-induced systemic resistance occurs in many plants and is commonly assumed to be adaptive. The mechanisms triggered by leaf-herbivores that lead to systemic resistance are largely understood, but it remains unknown how and why root herbivory also increases resistance in leaves. To resolve this, we investigated the mechanism by which the root herbivore Diabrotica...

Université de Neuchâtel

Sequence of arrival determines plant-mediated interactions between herbivores

Erb, Matthias ; Robert, Christelle Aurélie Maud ; Hibbard, Bruce E. ; Turlings, Ted C. J.

In: Journal of Ecology, 2011, vol. 99, no. 1, p. 7-15

1. Induced changes in plant quality can mediate indirect interactions between herbivores. Although the sequence of attack by different herbivores has been shown to influence plant responses, little is known about how this affects the herbivores themselves. 2. We therefore investigated how induction by the leaf herbivore Spodoptera frugiperda influences resistance of teosinte...

Université de Neuchâtel

Synergies and trade-offs between insect and pathogen resistance in maize leaves and roots

Erb, Matthias ; Balmer, Yves ; de Lange, Elvira S. ; von Merey, Georg ; Planchamp, Chantal ; Robert, Christelle Aurélie Maud ; Röder, Gregory ; Sobhy, Islam ; Zwahlen, Claudia ; Mauch-Mani, Brigitte ; Turlings, Ted C. J.

In: Plant, Cell & Environment, 2011, vol. 34, no. 7, p. 1088-1103

Determining links between plant defence strategies is important to understand plant evolution and to optimize crop breeding strategies. Although several examples of synergies and trade-offs between defence traits are known for plants that are under attack by multiple organisms, few studies have attempted to measure correlations of defensive strategies using specific single attackers. Such links...

Université de Neuchâtel

Systemic root signalling in a belowground, volatile-mediated tritrophic interaction

Hiltpold, Ivan ; Erb, Matthias ; Robert, Christelle Aurélie Maud ; Turlings, Ted C. J.

In: Plant, Cell & Environment, 2011, vol. 34, no. 8, p. 1267–1275

Plants attacked by leaf herbivores release volatile organic compounds (VOCs) both locally from the wounded site and systemically from non-attacked tissues. These volatiles serve as attractants for predators and parasitoids. This phenomenon is well described for plant leaves, but systemic induction of VOCs in the roots has remained unstudied. We assessed the spatial and temporal activation of the...

Université de Neuchâtel

Oviposition by a moth suppresses constitutive and herbivore-induced plant volatiles in maize

Gomes Villalba Peñaflor, M. Fernanda ; Erb, Matthias ; Robert, Christelle Aurélie Maud ; Miranda, Livia Atauri ; Graf Werneburg, Andrea ; Dossi, Fábio Cleisto Alda ; Turlings, Ted C. J. ; Bento, J. Maurício Simões

In: Planta, 2011, vol. 234, no. 1, p. 207-225

Plant volatiles function as important signals for herbivores, parasitoids, predators, and neighboring plants. Herbivore attack can dramatically increase plant volatile emissions in many species. However, plants do not only react to herbivore-inflicted damage, but also already start adjusting their metabolism upon egg deposition by insects. Several studies have found evidence that egg deposition...

Université de Neuchâtel

The underestimated role of roots in defense against leaf attackers

Erb, Matthias ; Lenk, Claudia ; Degenhardt, Jörg ; Turlings, Ted C. J.

In: Trends in Plant Science, 2009, vol. 14, no. 12, p. 653-659

Plants have evolved intricate strategies to withstand attacks by herbivores and pathogens. Although it is known that plants change their primary and secondary metabolism in leaves to resist and tolerate aboveground attack, there is little awareness of the role of roots in these processes. This is surprising given that plant roots are responsible for the synthesis of plant toxins, play an active...

Université de Neuchâtel

A tritrophic signal that attracts parasitoids to host-damaged plants withstands disruption by non-host herbivores

Erb, Matthias ; Foresti, Nicolas ; Turlings, Ted C. J.

In: BMC Plant Biology, 2010, vol. 10, no. 247, p. 1-11

Background Volatiles emitted by herbivore-infested plants are highly attractive to parasitoids and therefore have been proposed to be part of an indirect plant defense strategy. However, this proposed function of the plant-provided signals remains controversial, and it is unclear how specific and reliable the signals are under natural conditions with simultaneous feeding by multiple...

Université de Neuchâtel

Modification of plant resistance and metabolism by above- and belowground herbivores

Erb, Matthias ; Turlings, Théodor (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2009 ; Th. 2084.

Plants are often attacked by above- and belowground herbivores. As a result, they have evolved defense mechanisms to protect both their roots and shoot. However, physiological processes in roots and shoots are tightly connected, and attack of one of these plant parts can dramatically alter primary and secondary metabolism of the other (chapter 1). It is therefore important to understand how the...