Alterações anatômicas causadas por Ralstonia solanacearum Smith e Pectobacterium carotovorum (Jones) em caules de Solanum tuberosum L.

  • Yonis Hernández Universidad Central de Venezuela, Facultad de Agronomía, Instituto de Botánica Agrícola, Laboratorio de Bacterias Fitopatógenas. Maracay, estado Aragua, Venezuela. https://orcid.org/0000-0002-5838-6159
  • Marina García Universidad Técnica de Manabí, Facultad de Ingeniería Agronómica, Departamento de Ciencias Agronómicas, Portoviejo, 130105, Manabí, Ecuador. https://orcid.org/0000-0003-3461-1566
  • Rafael Mejías Universidad Central de Venezuela, Facultad de Agronomía, Instituto de Botánica Agrícola, Laboratorio de Bacterias Fitopatógenas. Maracay, estado Aragua, Venezuela. https://orcid.org/0000-0002-3431-1582
Palavras-chave: Histologia de caulina, infecção bacteriana, Papa

Resumo

A batata (Solanum tuberosum L.) é uma cultura notavelmente afetada por vários patógenos, incluindo bacterias, sendo importante estudar as alterações histológicas que eles produzem para entender os sintomas associados a cada doença. O objetivo desta pesquisa foi determinar as alterações anatômicas que ocorrem em caules de batata devido à infecção causada por Ralstonia solanacearum e Pectobacterium carotovorum. Foi realizado um ensaio com plantas da variedade Kennebec com 45 dias de idade, que foram infiltradas na base do caule principal com uma suspensão de 108 UFC.mL-1 de R. solanacearum ou P. carotovorum, e um tratamento foi incluído. controle em que as plantas foram tratadas com água destilada estéril. Doze dias após a inoculação, foram retirados segmentos do segundo entrenó do caule principal e fixados em FAA (formaldeído-ácido acético-etanol 70 %) até o processamento, para obtenção de cortes transversais do caule. Nas plantas inoculadas com R. solancaearum, observou-se a invasão dos vasos do xilema pela bactéria e a formação de tilos em algumas delas. Em relação ao P. carotovorum, foi encontrada necrose na forma de bandas descontínuas nas células da epiderme, córtex, cilindro vascular e medula, além de obstrução nos vasos do xilema pela bactéria e tilose em algumas delas. Los cambios anatómicos en el tallo, inducidos por las dos bacterias estudiadas, están directamente vinculados con la sintomatología de la enfermedad que cada una de ellas provoca en el cultivo de papa.  Palavras chave: histologia de caulina, infecção bacteriana, papa.

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Cross section of Solanum tuberosum stem with obstruction of xylem vessels due to infection with P. carotovorum
Publicado
2022-10-05
Como Citar
Hernández, Y., García, M., & Mejías, R. (2022). Alterações anatômicas causadas por Ralstonia solanacearum Smith e Pectobacterium carotovorum (Jones) em caules de Solanum tuberosum L. Revista Da Faculdade De Agronomia Da Universidade De Zulia, 39(4), e223947. Obtido de https://www.produccioncientificaluz.org/index.php/agronomia/article/view/38890
Secção
Produção Vegetal