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Turlings, Ted

Nom
Turlings, Ted
Affiliation principale
Fonction
Professeur.e ordinaire
Email
ted.turlings@unine.ch
Identifiants
https://libra.unine.ch/handle/123456789/330
_
0000-0002-8315-785X

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  • Publication
    Métadonnées seulement
    Induced carbon reallocation and compensatory growth as root herbivore tolerance mechanisms
    (2014)
    Robert, Christelle A. M.
    ;
    Ferrieri, Richard A.
    ;
    Schirmer, Stefanie
    ;
    Babst, Benjamin A.
    ;
    Schueller, Michael J.
    ;
    Machado, Ricardo A. R.
    ;
    Marques Arce, Carla C. 
    ;
    Hibbard, Bruce E.
    ;
    Gershenzon, Jonathan
    ;
    Turlings, Ted 
    ;
    Erb, Matthias 
    Upon attack by leaf herbivores, many plants reallocate photoassimilates below ground. However, little is known about how plants respond when the roots themselves come under attack. We investigated induced resource allocation in maize plants that are infested by the larvae Western corn rootworm Diabrotica virgifera virgifera. Using radioactive 11CO2, we demonstrate that root-attacked maize plants allocate more new 11C carbon from source leaves to stems, but not to roots. Reduced meristematic activity and reduced invertase activity in attacked maize root systems are identified as possible drivers of this shoot reallocation response. The increased allocation of photoassimilates to stems is shown to be associated with a marked thickening of these tissues and increased growth of stem-borne crown roots. A strong quantitative correlation between stem thickness and root regrowth across different watering levels suggests that retaining photoassimilates in the shoots may help root-attacked plants to compensate for the loss of belowground tissues. Taken together, our results indicate that induced tolerance may be an important strategy of plants to withstand belowground attack. Furthermore, root herbivore-induced carbon reallocation needs to be taken into account when studying plant-mediated interactions between herbivores.
  • Publication
    Métadonnées seulement
    Direct and indirect plant defenses are not suppressed by endosymbionts of a specialist root herbivore
    (2013)
    Robert, Christelle Aurélie Maud
    ;
    Frank, Daniel L.
    ;
    Leach, Kristen A.
    ;
    Turlings, Ted 
    ;
    Hibbard, Bruce Elliott
    ;
    Erb, Matthias 
  • Publication
    Métadonnées seulement
    Induction of root-resistance by leaf-herbivory follows a vertical gradient
    (2011)
    Erb, Matthias 
    ;
    Robert, Christelle Aurélie Maud
    ;
    Turlings, Ted 
    Leaf-herbivory can lead to systemic changes in root metabolism and resistance. As yet, it is unknown if these changes affect the whole root system, or if they are more pronounced in the upper root parts, which are closer to the actual site of attack. As this spatial aspect may be an important determinant of the interactions that can be expected to occur within the rhizosphere, we investigated if leaf-herbivore induced root resistance differs between upper and lower roots of maize. We also tested if the density of leaf-herbivores correlates with intensity of the root response. The systemic increase in resistance was found to be more pronounced in the upper than the lower roots and was independent of leaf herbivore density. The results suggest that there is a vertical gradient in the strength of the root response following leaf-herbivory, and that soil organisms living closer to the surface may be more affected by leaf-attack than the ones living in deeper soil layers.