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<p>The aim of this study was to identify latent pathogens of the <i>Botryosphaeriaceae</i> family, associated with black root rot and stem dry rot, in asymptomatic or healthy propagative material (stems) of <i>Manihot esculenta</i> in Brazil and test their pathogenicity.. Fungal species were identified by phylogenetic analysis of the regions <i>ITS</i>, <i>TEF 1-α</i> and <i>RPB2</i>. Three species were identified—<i>Lasiodiplodia euphorbiaceicola</i>, <i>L. theobromae</i> and <i>Neoscytalidium dimidiatum</i>—integrating fungal endophytic communities in <i>M. esculenta</i> plantations in the state of Pernambuco (Brazil). Pathogenicity tests confirmed the capacity of the <i>Botryosphaeriaceae</i> isolates obtained to cause lesions in <i>M. esculenta</i>. <i>Lasiodiplodia euphorbiaceicola</i>, <i>L. theobromae</i> and <i>N. dimidiatum</i> are recognized as pathogenic for <i>M. esculenta</i>, responsible for causing black root rot and stem dry rot in this crop in Brazil and other countries. However, this is the first study to isolate these latent pathogens in <i>M. esculenta</i> healthy propagative material in Brazilian plantations and test its pathogenicity in this host, showing evidence that these <i>Botryosphaeriaceae</i> can survive as pathogens or latent pathogens in this crop in Brazil.</p>

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Are rot-causing Botryosphaeriaceae species surviving in healthy Manihot esculenta propagative material in Brazil?

  • 期刊论文

  • 发表日期：

    2025年2月3日

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  • Amanda Cupertino de Queiroz Brito,
  • Juliana Ferreira de Mello,
  • José Vitorino da Silva Neto,
  • Daniele Magna Azevedo de Assis,
  • Ana Elisa de Almeida Souza,
  • Antonio Félix da Costa,
  • Ueder Pedro Lopes,
  • Cristina Maria de Souza-Motta,
  • Alexandre Reis Machado

摘要

The aim of this study was to identify latent pathogens of the Botryosphaeriaceae family, associated with black root rot and stem dry rot, in asymptomatic or healthy propagative material (stems) of Manihot esculenta in Brazil and test their pathogenicity.. Fungal species were identified by phylogenetic analysis of the regions ITS, TEF 1-α and RPB2. Three species were identified—Lasiodiplodia euphorbiaceicola, L. theobromae and Neoscytalidium dimidiatum—integrating fungal endophytic communities in M. esculenta plantations in the state of Pernambuco (Brazil). Pathogenicity tests confirmed the capacity of the Botryosphaeriaceae isolates obtained to cause lesions in M. esculenta. Lasiodiplodia euphorbiaceicola, L. theobromae and N. dimidiatum are recognized as pathogenic for M. esculenta, responsible for causing black root rot and stem dry rot in this crop in Brazil and other countries. However, this is the first study to isolate these latent pathogens in M. esculenta healthy propagative material in Brazilian plantations and test its pathogenicity in this host, showing evidence that these Botryosphaeriaceae can survive as pathogens or latent pathogens in this crop in Brazil.