Scholarlink

<p>Brazilian agriculture is a global leader in the production of a wide range of agricultural products for both domestic and international markets. A key microorganism contributing to this sustainable food production is the <i>Trichoderma</i> genus, which plays a central role in the formulation of numerous biofungicides in Brazil. The aim of this study was to characterize the antagonistic potential of previously isolated Brazilian strains of <i>T. afroharzianum</i>. Evaluations were conducted through in vitro bioassays against eight phytopathogenic fungi, including dual culture assays, assessments of volatile and nonvolatile metabolite production, and in vivo trials to assess the suppression of <i>Rhizoctonia solani</i> and <i>Sclerotium rolfsii</i> damping-off in tomato seedlings under greenhouse conditions. All tested phytopathogens were inhibited in the co-culture assays. The five strains selected for bioassays on metabolite production exhibited variable results in mycelial growth inhibition, depending on the specific antagonistic strain × phytopathogen × method interaction, highlighting distinct biofungicidal mechanisms. The three strains selected for greenhouse testing demonstrated efficacy in suppressing both diseases and maintaining or promoting agronomic traits, depending on the pathosystem. Based on these observations, it can be concluded that Brazilian <i>T. afroharzianum</i> strains exhibit significant in vitro antagonistic potential against several previously unstudied fungal pathogens and are capable of effectively suppressing damping off in tomatoes.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Assessment of antagonistic activity and tomato disease suppression by Brazilian strains of Trichoderma afroharzianum

  • 期刊论文

  • 发表日期：

    2025年6月5日

查看全文
  • Eder Marques,
  • Moisés Rodrigues Silva,
  • Wanessa Mendanha Soares,
  • Elismar Pires Ribeiro Junior,
  • Yara Jessie Alves Ferreira,
  • Emilly Ferreira Braga Rios,
  • Marcos Gomes da Cunha

摘要

Brazilian agriculture is a global leader in the production of a wide range of agricultural products for both domestic and international markets. A key microorganism contributing to this sustainable food production is the Trichoderma genus, which plays a central role in the formulation of numerous biofungicides in Brazil. The aim of this study was to characterize the antagonistic potential of previously isolated Brazilian strains of T. afroharzianum. Evaluations were conducted through in vitro bioassays against eight phytopathogenic fungi, including dual culture assays, assessments of volatile and nonvolatile metabolite production, and in vivo trials to assess the suppression of Rhizoctonia solani and Sclerotium rolfsii damping-off in tomato seedlings under greenhouse conditions. All tested phytopathogens were inhibited in the co-culture assays. The five strains selected for bioassays on metabolite production exhibited variable results in mycelial growth inhibition, depending on the specific antagonistic strain × phytopathogen × method interaction, highlighting distinct biofungicidal mechanisms. The three strains selected for greenhouse testing demonstrated efficacy in suppressing both diseases and maintaining or promoting agronomic traits, depending on the pathosystem. Based on these observations, it can be concluded that Brazilian T. afroharzianum strains exhibit significant in vitro antagonistic potential against several previously unstudied fungal pathogens and are capable of effectively suppressing damping off in tomatoes.