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Occurrence and characterization of a nucleopolyhedrovirus from Spodoptera littoralis (Lepidoptera: Noctuidae) isolated in the Azores
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Resumo(s)
A nucleopolyhedrovirus (SpliMNPV-Az) was isolated from diseased larvae of Spodoptera littoralis, collected at the Island of S. Miguel in Azores. The virulence of this isolate was tested against S. littoralis larvae in laboratory. LD50 against 2nd and 3rd instars were not significantly different larvae, but both were significantly different from that against 4th instar. The complete codons sequence of SpliMNPV-Az Polh gene obtained was 750 bp (NCBI GenBank Accession No. AY600451). This sequence was compared to other 38 polyhedrin genes from NPVs and to 6 granulin genes from GVs and resulted to be identical to the sequence of a SpliMNPV previously published, thus indicating that the natural host of SpliMNPV-Az must be S. littoralis. Genetic distances estimated from restriction enzymes profiles showed SpliMNPV-Az is close to the Egyptian SpliMNPV type B, despite some degree of genetic divergence suggested by slight differences observed on PstI profile.
Descrição
Copyright © 2005 Elsevier Inc. All rights reserved.
Palavras-chave
Baculovirus Polyhedrin Ultrastructure Spodoptera littoralis Spodoptera littoralis nucleopolyhedrosis Virus characterization Virulence
Contexto Educativo
Citação
Martins, T., R. Montiel, J. Medeiros, L. Oliveira & N. Simões, 2005. Occurrence and characterization of a nucleopolyhedrovirus from Spodoptera littoralis (Lepidoptera: Noctuidae) isolated in the Azores. "Journal of Invertebrate Pathology", 89(3): 185-192.
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