Characterization, pathogenicity and anastomosis groups of Rhizoctonia solani from watermelon

Autores

  • Kecia Mayara de Araújo Galvão Universidade Federal do Vale do São Francisco
  • Fábio Sanchez da Cunha Universidade Federal do Vale do São Francisco
  • Francine Hiromi Ishikawa Universidade Federal do Vale do São Francisco http://orcid.org/0000-0002-7491-2657
  • Antonio Elton da Silva Costa Universidade Federal do Vale do São Francisco
  • Alexandre Sandri Capucho Universidade Federal do Vale do São Francisco

DOI:

https://doi.org/10.14295/cs.v9i4.2963

Resumo

The objective of this study was to characterize the morphological and pathogenic variation of Rhizoctonia solani isolates as well as to determine mycelial compatibility and hyphal fusion. The R. solani isolates CMM1053, CMM2967, CMM1052, CMM2983, CMM2971 and CMM3890 from watermelon were used. The determination of aggressiveness was evaluated using the six isolates inoculated in the Crimson Sweet susceptible cultivar in a completely randomized design (CRD) with five replicates, the sample unit consisting of one plant. The experiment of mycelial growth rate was installed in the factorial scheme, 6 isolates x 3 culture media, using the following culture media Nutrient Agar, PDA and PSA, and a total of 5 replicates. The color characterization and sclerotia formation was performed 15 days after the fungal inoculation in each culture medium. For the characterization of vegetative compatibility and occurrence of hyphal fusion, the experiments were performed in CDR with three and two replicates, respectively. CMM1053 and CMM1052 isolates were the most aggressive; however, they were statistically different only from CMM2967 isolate. The PSA medium was the most promising for the mycelial growth. It was possible to observe that there was variability in the colonies color, being higher in the Nutrient Agar medium. Based on evaluations of vegetative compatibility and hyphal fusion, the six isolates belong to the same anastomosis group.

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Biografia do Autor

Francine Hiromi Ishikawa, Universidade Federal do Vale do São Francisco

Colegiado de Engenharia Agronômica

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Arquivos adicionais

Publicado

2019-01-04

Como Citar

Galvão, K. M. de A., Cunha, F. S. da, Ishikawa, F. H., Costa, A. E. da S., & Capucho, A. S. (2019). Characterization, pathogenicity and anastomosis groups of Rhizoctonia solani from watermelon. Comunicata Scientiae, 9(4), 710–717. https://doi.org/10.14295/cs.v9i4.2963

Edição

v. 9 n. 4 (2018)

Seção

Artigos

Licença

A revista se reserva o direito de efetuar, nos originais, alterações de ordem normativa, ortográfica e gramatical, com vistas a manter o padrão culto da língua, respeitando, porém, o estilo dos autores. As provas finais serão enviadas aos autores. Os trabalhos publicados passam a ser propriedade da revista Comunicata Scientiae, ficando sua reimpressão total ou parcial, sujeita à autorização expressa da direção do periódico. Deve ser consignada a fonte de publicação original. Os originais não serão evolvidos aos autores. As opiniões emitidas pelos autores dos artigos são de sua exclusiva responsabilidade.