Abstract:
:Aphid transmission of poleroviruses is highly specific, but the viral determinants governing this specificity are unknown. We used a gene exchange strategy between two poleroviruses with different vectors, Beet western yellows virus (BWYV) and Cucurbit aphid-borne yellows virus (CABYV), to analyze the role of the major and minor capsid proteins in vector specificity. Virus recombinants obtained by exchanging the sequence of the readthrough domain (RTD) between the two viruses replicated in plant protoplasts and in whole plants. The hybrid readthrough protein of chimeric viruses was incorporated into virions. Aphid transmission experiments using infected plants or purified virions revealed that vector specificity is driven by the nature of the RTD. BWYV and CABYV have specific intestinal sites in the vectors for endocytosis: the midgut for BWYV and both midgut and hindgut for CABYV. Localization of hybrid virions in aphids by transmission electron microscopy revealed that gut tropism is also determined by the viral origin of the RTD.
journal_name
J Viroljournal_title
Journal of virologyauthors
Brault V,Périgon S,Reinbold C,Erdinger M,Scheidecker D,Herrbach E,Richards K,Ziegler-Graff Vdoi
10.1128/JVI.79.15.9685-9693.2005subject
Has Abstractpub_date
2005-08-01 00:00:00pages
9685-93issue
15eissn
0022-538Xissn
1098-5514pii
79/15/9685journal_volume
79pub_type
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