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Trichoderma aureoviride URM 5158 and Trichoderma hamatum URM 6656 are Biocontrol Agents that act against Cassava Root rot through different Mechanisms

Da Silva, José Aldo Teixeira ; De Medeiros, Erika Valente ; Da Silva, Jéssica Morais ; Tenório, Dyana De A. ; Moreira, Keila Aparecida ; Nascimento, Talita Camila Evaristo Da Silva ; Souza‐Motta, Cristina

Journal of Phytopathology, December 2016, Vol.164(11-12), pp.1003-1011 [Periódico revisado por pares]

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  • Título:
    Trichoderma aureoviride URM 5158 and Trichoderma hamatum URM 6656 are Biocontrol Agents that act against Cassava Root rot through different Mechanisms
  • Autor: Da Silva, José Aldo Teixeira ; De Medeiros, Erika Valente ; Da Silva, Jéssica Morais ; Tenório, Dyana De A. ; Moreira, Keila Aparecida ; Nascimento, Talita Camila Evaristo Da Silva ; Souza‐Motta, Cristina
  • Assuntos: Antagonism ; Ascorbate Peroxidase ; Chitinase ; Fusarium Solani ; Peroxidase ; Plant Resistance Inducer
  • É parte de: Journal of Phytopathology, December 2016, Vol.164(11-12), pp.1003-1011
  • Descrição: has been used to manage a large number of pathogens, but there is a gap in the mechanisms used by these biocontrol agents regarding the physiological response of cassava plants () when it is subjected to cassava root rot. The aims of this study were to investigate the antagonist activity of ten isolates against on potato dextrose Agar (PDA), to quantify the chitinase production, to select and test the best isolate from each experiment and to assess the physiological response of cassava to the production of oxidative enzyme complex production (ascorbate peroxidase, catalase, peroxidase and polyphenol oxidase). All isolates have shown competitive capability against , and URM 6656 showed the highest inhibition of pathogen growth (88.91%). All isolates have shown chitinase activity, but URM 5158 produced the highest amount of chitinase. URM 6656 and .  URM 5158 were selected to be applied . The two strains reduced 64 and 60% of the disease severity in the shoot and 82 and 84% in the root. Cassava plants infected with have shown the highest peroxidase and ascorbate peroxidase production. Our results have indicated that URM 5158 is an effective biocontrol agent against cassava root rot caused by , because it presented competitive antagonist capability , the highest chitinase production, and reduced the cassava root rot severity. The application of has led to the maximum enzyme activity of reactive oxygen species group in cassava plants.
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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