The Association between New World Alphasatellites and Bipartite Begomoviruses: Effects on Infection and Vector Transmission

Begomoviruses can be found in association with alphasatellites, which are capable of autonomous replication but are dependent on the helper begomovirus for systemic infection, encapsidation and vector transmission. Previous studies suggest that the presence of NW alphasatellites (genus Clecrusatelli...

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Bibliographic Details
Published in:Pathogens (Basel) 2021-09, Vol.10 (10), p.1244
Main Authors: Nogueira, Angélica M., Nascimento, Monique B., Barbosa, Tarsiane M. C., Quadros, Ayane F. F., Gomes, João Paulo A., Orílio, Anelise F., Barros, Danielle R., Zerbini, Francisco Murilo
Format: Article
Language:English
Subjects:
Accumulation
Begomovirus
clecrusatellite
Disseminated infection
Encapsidation
experimental host
fitness
Flowers & plants
geminivirus
Infections
Infectivity
natural host
Plant virus diseases
Plant viruses
Proteins
Satellites
Signs and symptoms
Tomatoes
Viruses
whitefly
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Summary:Begomoviruses can be found in association with alphasatellites, which are capable of autonomous replication but are dependent on the helper begomovirus for systemic infection, encapsidation and vector transmission. Previous studies suggest that the presence of NW alphasatellites (genus Clecrusatellite) is associated with more severe symptoms. To better understand this interaction, we investigated the effects of two alphasatellites on infectivity, symptom development, viral DNA accumulation and vector transmission of three begomoviruses in three hosts. In tomato and Nicotiana benthamiana, all combinations were infectious. In Leonurus sibiricus, only the ToYSV/ToYSA combination was infectious. The presence of EuYMA increased symptom severity of EuYMV and ToYSV in N. benthamiana, and the presence of ToYSA was associated with more severe symptoms of ToYSV in N. benthamiana and L. sibiricus. EuYMA increased the accumulation of ToYSV in N. benthamiana but reduced the accumulation of EuYMV in tomato and of ToSRV in N. benthamiana. The presence of ToYSA decreased the accumulation of ToYSV in N. benthamiana and L. sibiricus. ToYSA negatively affected transmission of ToSRV by Bemisia tabaci MEAM1. Together, our results indicate that NW alphasatellites can interact with different begomoviruses, increasing symptom severity and interfering in the transmission of the helper begomovirus. Understanding this interaction is important as it may affect the emergence of diseases caused by begomovirus–alphasatellite complexes in the field.
ISSN:2076-0817
2076-0817
DOI:10.3390/pathogens10101244