Preference by a virus vector for infected plants is reversed after virus acquisition

•We tested the effects of virus acquisition by an insect vector on its host plant preferences.•Preferential settling by Myzus persicae on infected plants was reversed after virus acquisition.•The change in preference occurred in response to trapped and artificial blends of plant volatiles.•Condition...

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Bibliographic Details
Published in:Virus research 2014-06, Vol.186, p.32-37
Main Authors: Rajabaskar, Dheivasigamani, Bosque-Pérez, Nilsa A., Eigenbrode, Sanford D.
Format: Article
Language:English
Subjects:
Animals
Aphididae
Aphids - drug effects
Aphids - virology
Behavior, Animal
Disease spread
Feeding Behavior
Host-Parasite Interactions
Host-Pathogen Interactions
Insect Vectors - drug effects
Insect Vectors - virology
Luteoviridae - chemistry
Luteoviridae - pathogenicity
Luteoviridae - physiology
Myzus persicae
Plant Diseases - parasitology
Plant Diseases - virology
Plant–insect–virus-interactions
Potato leaf roll virus
Potato volatiles
Solanum tuberosum
Solanum tuberosum - parasitology
Solanum tuberosum - virology
Virus-induced plant volatiles
Volatile Organic Compounds - isolation & purification
Volatile Organic Compounds - pharmacology
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Summary:•We tested the effects of virus acquisition by an insect vector on its host plant preferences.•Preferential settling by Myzus persicae on infected plants was reversed after virus acquisition.•The change in preference occurred in response to trapped and artificial blends of plant volatiles.•Conditional vector preference should increase virus spread. Pathogens and their vectors can interact either directly or indirectly via their shared hosts, with implications for the persistence and spread of the pathogen in host populations. For example, some plant viruses induce changes in host plants that cause the aphids that carry these viruses to settle preferentially on infected plants. Furthermore, relative preference by the vector for infected plants can change to a preference for noninfected plants after virus acquisition by the vector, as has recently been demonstrated in the wheat–Rhopalosiphum padi–Barley yellow dwarf virus pathosystem. Here we document a similar dynamic in the potato–Myzus persicae (Sulzer)–Potato leaf roll virus (PLRV) pathosystem. Specifically, in a dual choice bioassay, nonviruliferous apterous M. persicae settled preferentially on or near potato plants infected with PLRV relative to noninfected (sham-inoculated) control plants, whereas viruliferous M. persicae (carrying PLRV) preferentially settled on or near sham-inoculated potato plants relative to infected plants. The change in preference after virus acquisition also occurred in response to trapped headspace volatiles, and to synthetic mimics of headspace volatile blends from PLRV-infected and sham-inoculated potato plants. The change in preference we document should promote virus spread by increasing rates of virus acquisition and transmission by the vector.
ISSN:0168-1702
1872-7492
DOI:10.1016/j.virusres.2013.11.005