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Three Aphid-Transmitted Viruses Encourage Vector Migration From Infected Common Bean (Phaseolus vulgaris) Plants Through a Combination of Volatile and Surface Cues.

Accepted version
Peer-reviewed

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Type

Article

Change log

Authors

Wamonje, Francis O 
Tungadi, Trisna D 
Murphy, Alex M 
Pate, Adrienne E 
Woodcock, Christine 

Abstract

Bean common mosaic virus (BCMV), bean common mosaic necrosis virus (BCMNV), and cucumber mosaic virus (CMV) are important pathogens of common bean (Phaseolus vulgaris), a crop vital for food security in sub-Saharan Africa. These viruses are vectored by aphids non-persistently, with virions bound loosely to stylet receptors. These viruses also manipulate aphid-mediated transmission by altering host properties. Virus-induced effects on host-aphid interactions were investigated using choice test (migration) assays, olfactometry, and analysis of insect-perceivable volatile organic compounds (VOCs) using gas chromatography (GC)-coupled mass spectrometry, and GC-coupled electroantennography. When allowed to choose freely between infected and uninfected plants, aphids of the legume specialist species Aphis fabae, and of the generalist species Myzus persicae, were repelled by plants infected with BCMV, BCMNV, or CMV. However, in olfactometer experiments with A. fabae, only the VOCs emitted by BCMNV-infected plants repelled aphids. Although BCMV, BCMNV, and CMV each induced distinctive changes in emission of aphid-perceivable volatiles, all three suppressed emission of an attractant sesquiterpene, α-copaene, suggesting these three different viruses promote migration of virus-bearing aphids in a similar fashion.

Description

Keywords

bean common mosaic necrosis virus, bean common mosaic virus, black bean aphid, cucumber mosaic virus, electroantennography, green peach aphid, non-persistent transmission, virus-induced plant volatiles

Journal Title

Front Plant Sci

Conference Name

Journal ISSN

1664-462X
1664-462X

Volume Title

11

Publisher

Frontiers Media SA

Rights

All rights reserved
Sponsorship
Biotechnology and Biological Sciences Research Council (BB/R005397/1)
Biotechnology and Biological Sciences Research Council (BB/J011762/1)
BBSRC (via University of Bristol) (BB/R005397/1)
Biotechnology and Biological Sciences Research Council (BB/P023223/1)
Work was funded by grants from the Biotechnology and Biological Sciences Research Council (BBSRC-SCPRID Grant BB/J011762/1 and BBSRC-GCRF Grant BB/P023223/1), the Leverhulme Trust (F/09 741F), Royal Society (FCG\R1\201005) and the Cambridge-Africa-ALBORADA Research Fund. JMM also receives support from the BBSRC BB/R005397/1 GCRF-CONNECTED Network, and a Research England-GCRF QR grant (G108162) with JPC. FOW is currently supported through a Royal Society-FLAIR Fellowship (Grant number FLR\R1 \190462). The FLAIR Fellowship is a partnership between the African Academy of Sciences and the Royal Society that is funded by the UK Government as part of the Global Challenge Research Fund (GCRF).