Hypervirulent diuraphis noxia (Hemiptera: Aphididae) Biotype SAM avoids triggering defenses in its host (Triticum aestivum) (Poales: Poaceae) during Feeding

Anna Maria Botha, N. Francois V. Burger, Leon Van Eck

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

In the molecular arms race between aphids and plants, both organisms rely on adaptive strategies to outcompete their evolutionary rival. In the current study, we investigated the difference in elicited defense responses of wheat (Triticum aestivum L.) near-isogenic lines with different Dn resistance genes, upon feeding by an avirulent and hypervirulent Diuraphis noxia Kurdjumov biotype. After measuring the activity of a suite of enzymes associated with plant defense, it became apparent that the host does not recognize the invasion by the hypervirulent aphid because none of these were induced, while feeding by the avirulent biotype did result in induction of enzyme activity. Genomic plasticity in D. noxia may be a likely explanation for the observed differences in virulence between D. noxia bio type SA1 and SAM, as demonstrated in the current study.

Original languageEnglish (US)
Pages (from-to)672-681
Number of pages10
JournalEnvironmental entomology
Volume43
Issue number3
DOIs
StatePublished - Jun 2014

Keywords

  • Glutathione S-transferase
  • Peroxidase
  • Plant-insect interaction
  • Russian wheat aphid
  • β-1,3-glucanase

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