| Autor: |
Soares, Thaissa P. F., Ferreira, Maria A., Mafia, Reginaldo G., Oliveira, Leonardo S. S., Hodges, Charles S., Alfenas, Acelino C. |
| Zdroj: |
Tropical Plant Pathology; August 2018, Vol. 43 Issue: 4 p314-322, 9p |
| Abstrakt: |
Chrysoporthespecies are known to cause canker on hosts belonging to Myrtaceaeand Melastomataceaefamilies. Cankers occur on tree trunks and branches and may reduce growth and lead to plant death. In this study, the incidence and pathogenicity of Chrysoporthe cubensisand other species causing canker on Eucalyptussp., Tibouchina heteromalla and T. granulosawere examined. The isolates were collected in Maranhão (MA) and Minas Gerais (MG) in Brazil. Sequence analysis of beta-tubulin and actin genomic regions confirmed the presence of C. cubensisand C. doradensison clones of the hybrid Eucalyptus grandisx E. urophylla, T. granulosa, and T. heteromallain Brazil. Morphological characterization enabled the identification of the isolates from both genera primarily based on differences in conidial size and shape. The isolates were pathogenic to ten Eucalyptusclones and Tibouchinaplants. Our results contribute new knowledge of Chrysoporthespecies causing diseases of woody plants in Brazil of importance to Eucalyptusbreeding programs when screening for resistance. Furthermore, this is the first report of C. doradensisinfecting Eucalyptusand T. granulosa, as well as the first record of C. cubensisinfecting T. heteromallain Brazil. |
| Databáze: |
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