A Current Overview of the Papaya meleira virus, an Unusual Plant Virus
| Autor: | Antonio Alberto Ribeiro Fernandes, Daisy Pérez-Brito, Anuar Magaña-Álvarez, Patricia Machado Bueno Fernandes, Paolla M. V. Abreu, José A. Ventura, Tathiana Ferreira Sá Antunes, Raul Tapia-Tussell |
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| Rok vydání: | 2015 |
| Předmět: |
papaya sticky disease
laticifers colonization lcsh:QR1-502 Genome Viral Review Biology lcsh:Microbiology Virus Plant Viruses Microbiology phytopathogenic virus Virology Plant virus Genotype RNA Viruses Gene dsRNA genome virus Plant Diseases Carica Inoculation RNA biology.organism_classification RNA silencing Infectious Diseases Host-Pathogen Interactions |
| Zdroj: | Viruses, Vol 7, Iss 4, Pp 1853-1870 (2015) Viruses |
| ISSN: | 1999-4915 |
| DOI: | 10.3390/v7041853 |
| Popis: | Papaya meleira virus (PMeV) is the causal agent of papaya sticky disease, which is characterized by a spontaneous exudation of fluid and aqueous latex from the papaya fruit and leaves. The latex oxidizes after atmospheric exposure, resulting in a sticky feature on the fruit from which the name of the disease originates. PMeV is an isometric virus particle with a double-stranded RNA (dsRNA) genome of approximately 12 Kb. Unusual for a plant virus, PMeV particles are localized on and linked to the polymers present in the latex. The ability of the PMeV to inhabit such a hostile environment demonstrates an intriguing interaction of the virus with the papaya. A hypersensitivity response is triggered against PMeV infection, and there is a reduction in the proteolytic activity of papaya latex during sticky disease. In papaya leaf tissues, stress responsive proteins, mostly calreticulin and proteasome-related proteins, are up regulated and proteins related to metabolism are down-regulated. Additionally, PMeV modifies the transcription of several miRNAs involved in the modulation of genes related to the ubiquitin-proteasome system. Until now, no PMeV resistant papaya genotype has been identified and roguing is the only viral control strategy available. However, a single inoculation of papaya plants with PMeV dsRNA delayed the progress of viral infection. |
| Databáze: | OpenAIRE |
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