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Summa Phytopathologica

versão impressa ISSN 0100-5405versão On-line ISSN 1980-5454

Resumo

CUNHA JUNIOR, Jadier de Oliveira; POZZER, Luciana  e  BRIOSO, Paulo Sergio Torres. Biological variability of Citrus leprosis virus (CiLV) isolates from sweet orange cultivars. Summa phytopathol. [online]. 2007, vol.33, n.3, pp.294-296. ISSN 0100-5405.  https://doi.org/10.1590/S0100-54052007000300015.

Citrus leprosis, caused by Citrus leprosis virus (CiLV) is one of the major diseases in citrus orchards in the State of Rio de Janeiro. The objective of this study was to compare the development of symptoms on Chenopodium amaranticolor inoculated with CiLV isolates from 'Lima', 'Pera' and 'Seleta' sweet oranges using three different dilutions. Five to seven-days after inoculation, necrotic lesions exhibiting a small chlorotic halo when exposed to the light, were observed. The highest number of lesions developed using the three dilutions was obtained from 'Seleta', an intermediate value from 'Pêra' and the lowest number from 'Lima'. The best dilution for lesions development was 1:10. The results demonstrate a possible biological variability among the virus isolates and/or a lower or higher viral replication, dependent on the cultivar. This indicates a putative mechanism of Citrus resistance to the virus.

Palavras-chave : Citrus; leprosis; Cytorhabdovirus.

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