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Detecção e caracterização molecular dos genes da proteína capsidial de ilarvírus e ampelovírus que infectam fruteiras temperadas / Detection and molecular characterization of ilarvirus and ampelovirus coat protein genes infecting temperate fruit trees
Fajardo, Thor Vinícius Martins; Nickel, Osmar; Eiras, Marcelo.
  • Fajardo, Thor Vinícius Martins; s.af
  • Nickel, Osmar; s.af
  • Eiras, Marcelo; s.af
Ciênc. rural ; 41(1): 5-9, 2011. tab
Article in Portuguese | LILACS | ID: lil-571446
RESUMO
Dentre os principais patógenos que incidem em fruteiras temperadas, destacam-se o Prune dwarf virus (PDV), o Apple mosaic virus (ApMV) e o Grapevine leafroll-associated virus 1 (GLRaV-1). Neste trabalho foram realizadas a detecção e a caracterização molecular dos genes da proteína capsidial de isolados destas três espécies virais. RNAs totais foram extraídos de amostras de folhas de pessegueiros, macieiras e videiras e, nas reações de RT-PCR, foram utilizados oligonucleotídeos específicos para cada espécie viral. Os cDNAs amplificados foram clonados e sequenciados. Foram verificadas altas identidades entre as sequências de nucleotídeos dos genes da proteína capsidial dos isolados brasileiros de PDV, ApMV e GLRaV-1 e isolados de outros países, independente da origem geográfica e da hospedeira. O peso molecular da proteína capsidial destes vírus foi estimado por meio de Western blot em cerca de 24kDa (PDV), 26kDa (ApMV) e 39kDa (GLRaV-1).
ABSTRACT
Among the main pathogens infecting temperate fruit trees are Prune dwarf virus, Apple mosaic virus and Grapevine leafroll-associated virus 1. In this work the detection and molecular characterization of the coat protein genes of isolates from these viral species were carried out. Total RNA was extracted from peach, apple and grapevine leaves and RT-PCR reactions were performed using specific primers to each virus. The amplified cDNA fragments were cloned and sequenced. High identities were observed between coat protein nucleotide sequences of Brazilian isolates of PDV, ApMV and GLRaV-1 and isolates from other countries, independently from geographic origin and host. Coat protein molecular weights of these viruses were estimated by Western blot to be ca. 24kDa (PDV), 26kDa (ApMV) and 39kDa (GLRaV-1).


Full text: Available Index: LILACS (Americas) Type of study: Diagnostic study Language: Portuguese Journal: Ciênc. rural Journal subject: Science / Environmental Health Year: 2011 Type: Article

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Full text: Available Index: LILACS (Americas) Type of study: Diagnostic study Language: Portuguese Journal: Ciênc. rural Journal subject: Science / Environmental Health Year: 2011 Type: Article