AI Article Synopsis

  • Cucumber mosaic virus (CMV) affects tomato plants and is transmitted by aphids; the study examined how CMV influences aphid behavior through volatile organic compounds (VOCs) emitted by infected plants.
  • The research found that generalist and specialist aphids displayed varying preferences for settling on CMV-infected versus mock-inoculated plants at different time points post-inoculation, indicating that aphids are influenced by the infection status of the plants.
  • Notably, the interaction changes between aphids and plants were linked to specific CMV proteins but did not involve the salicylic acid defense signal, which protects plants from CMV damage without affecting aphid behavior.

Article Abstract

Cucumber mosaic virus (CMV), a major tomato pathogen, is aphid-vectored in the non-persistent manner. We investigated if CMV-induced volatile organic compounds (VOCs) or other virus-induced cues alter aphid-tomato interactions. Y-tube olfactometry showed that VOCs emitted by plants infected with CMV (strain Fny) attracted generalist () and Solanaceae specialist () aphids. preferred settling on infected plants (3 days post-inoculation: dpi) at 1h post-release, but at 9 and 21 dpi, aphids preferentially settled on mock-inoculated plants. showed no strong preference for mock-inoculated versus infected plants at 3 dpi but settled preferentially on mock-inoculated plants at 9 and 21 dpi. In darkness aphids showed no settling or migration bias towards either mock-inoculated or infected plants. However, tomato VOC blends differed in light and darkness, suggesting aphids respond to a complex mix of olfactory, visual, and other cues influenced by infection. The LS-CMV strain induced no changes in aphid-plant interactions. Experiments using inter-strain recombinant and pseudorecombinant viruses showed that the Fny-CMV 2a and 2b proteins modified tomato interactions with and , respectively. The defence signal salicylic acid prevents excessive CMV-induced damage to tomato plants but is not involved in CMV-induced changes in aphid-plant interactions.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9416248PMC
http://dx.doi.org/10.3390/v14081703DOI Listing

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