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

Auteur(s)
Erb, Matthias 
PRN Biologie 
Balmer, Yves
de Lange, Elvira S.
von Merey, Georg
Planchamp, Chantal 
PRN Biologie 
Robert, Christelle Aurélie Maud
Röder, Gregory 
Cours de médecine 
Sobhy, Islam
Zwahlen, Claudia 
Institut de biologie 
Mauch-Mani, Brigitte 
Institut de biologie 
Turlings, Ted 
Institut de biologie 
Date de parution
2011
In
Plant, Cell & Environment, Wiley, 2011/34/7/1088-1103
Mots-clés
  • <i>Zea mays</i>
  • herbivore-induced plant volatiles
  • induced defence
  • pathogens
  • resistance
  • root herbivory
  • synergy
  • <i>Zea mays</i>

  • herbivore-induced pla...

  • induced defence

  • pathogens

  • resistance

  • root herbivory

  • synergy

Résumé
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 are hard to detect in natural populations because they are inherently confounded by the evolutionary history of different ecotypes. We therefore used a range of 20 maize inbred lines with considerable differences in resistance traits to determine if correlations exist between leaf and root resistance against pathogens and insects. Aboveground resistance against insects was positively correlated with the plant's capacity to produce volatiles in response to insect attack. Resistance to herbivores and resistance to a pathogen, on the other hand, were negatively correlated. Our results also give first insights into the intraspecific variability of root volatiles release in maize and its positive correlation with leaf volatile production. We show that the breeding history of the different genotypes (dent versus flint) has influenced several defensive parameters. Taken together, our study demonstrates the importance of genetically determined synergies and trade-offs for plant resistance against insects and pathogens.
Identifiants
https://libra.unine.ch/handle/123456789/10898
_
10.1111/j.1365-3040.2011.02307.x
Type de publication
journal article
Dossier(s) à télécharger
 main article: Erb_Matthias_-_Synergies_and_trade-offs_between_insect_and_pathogen_resistance_in_maize_20120116.pdf (1.79 MB)
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