Impact of Mutations in Arabidopsis thaliana Metabolic Pathways on Polerovirus Accumulation, Aphid Performance, and Feeding Behavior

Viruses. 2020 Jan 27;12(2):146. doi: 10.3390/v12020146.


During the process of virus acquisition by aphids, plants respond to both the virus and the aphids by mobilizing different metabolic pathways. It is conceivable that the plant metabolic responses to both aggressors may be conducive to virus acquisition. To address this question, we analyze the accumulation of the phloem-limited polerovirus Turnip yellows virus (TuYV), which is strictly transmitted by aphids, and aphid's life traits in six Arabidopsis thaliana mutants (xth33, ss3-2, nata1, myc234, quad, atr1D, and pad4-1). We observed that mutations affecting the carbohydrate metabolism, the synthesis of a non-protein amino acid and the glucosinolate pathway had an effect on TuYV accumulation. However, the virus titer did not correlate with the virus transmission efficiency. Some mutations in A. thaliana affect the aphid feeding behavior but often only in infected plants. The duration of the phloem sap ingestion phase, together with the time preceding the first sap ingestion, affect the virus transmission rate more than the virus titer did. Our results also show that the aphids reared on infected mutant plants had a reduced biomass regardless of the mutation and the duration of the sap ingestion phase.

Keywords: Arabidopsis thaliana mutant; aphid biomass; electropenetrography (EPG); polerovirus; transmission.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Aphids / physiology*
  • Aphids / virology
  • Arabidopsis / genetics*
  • Feeding Behavior*
  • Female
  • Insect Vectors / physiology
  • Insect Vectors / virology
  • Luteoviridae / genetics
  • Luteoviridae / physiology*
  • Metabolic Networks and Pathways / genetics*
  • Mutation*
  • Phloem / virology
  • Plant Diseases / virology