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• W2938793257 abstract "RNA silencing is the primary immune response against geminivirus infection. Betasatellites associated with the geminivirus–betasatellite disease complex encode a suppressor to antagonize both the transcriptional gene silencing and post-transcriptional gene silencing pathways. Protein post-translational modifications, such as phosphorylation and ubiquitination, may contribute to anti-geminiviral immunity, which is sometimes hijacked by the betasatellite to facilitate infection. Autophagy has been found to be an effective anti-geminiviral immune response both in plants and in the transmission vector whitefly. The betasatellite induces the autophagy pathway to downregulate key components of the plant RNA silencing pathway to promote geminivirus infection. Betasatellites are a diverse group of circular single-stranded DNA satellites frequently associated with begomoviruses belonging to the family Geminiviridae. Challenged with a geminivirus–betasatellite infection, plants have employed sophisticated defense mechanisms to protect themselves. Betasatellites, in turn, employ mechanisms to antagonize these plant antiviral pathways. In this review, we focus on the anti-geminiviral immune pathways present both in plants and whiteflies. We also outline the counter-defensive strategies deployed by betasatellites to overcome the host defenses and initiate a successful infection. Finally, we discuss the outcomes of the opposing forces of plant immunity and betasatellite-mediated antagonism in the context of an evolutionary arms race. Understanding of the molecular dialog between plants and betasatellites will likely allow for the development of novel antiviral strategies. Betasatellites are a diverse group of circular single-stranded DNA satellites frequently associated with begomoviruses belonging to the family Geminiviridae. Challenged with a geminivirus–betasatellite infection, plants have employed sophisticated defense mechanisms to protect themselves. Betasatellites, in turn, employ mechanisms to antagonize these plant antiviral pathways. In this review, we focus on the anti-geminiviral immune pathways present both in plants and whiteflies. We also outline the counter-defensive strategies deployed by betasatellites to overcome the host defenses and initiate a successful infection. Finally, we discuss the outcomes of the opposing forces of plant immunity and betasatellite-mediated antagonism in the context of an evolutionary arms race. Understanding of the molecular dialog between plants and betasatellites will likely allow for the development of novel antiviral strategies." @default.
• W2938793257 created "2019-04-25" @default.
• W2938793257 creator A5004455002 @default.
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• W2938793257 creator A5089986454 @default.
• W2938793257 date "2019-06-01" @default.
• W2938793257 modified "2023-10-17" @default.
• W2938793257 title "Geminivirus-Associated Betasatellites: Exploiting Chinks in the Antiviral Arsenal of Plants" @default.
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