Geminivirus-Associated Betasatellites: Exploiting Chinks in the Antiviral Arsenal of Plants
2019
Ieong, Sao Leng | Guo, Wei | Li, Fangfang | Sunter, Garry | Zhou, Xueping
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.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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