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Doctoral Thesis
DOI
10.11606/T.17.2017.tde-20072016-102957
Document
Author
Full name
Eriston Vieira Gomes
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Ribeirão Preto, 2015
Supervisor
Committee
Silva, Roberto do Nascimento (President)
Damasio, André Ricardo de Lima
Goldman, Maria Helena de Souza
Jorge, Joao Atilio
Polizeli, Maria de Lourdes Teixeira de Moraes
Title in Portuguese
Estudo de genes de Trichoderma harzianum associados ao micoparasitismo e seu papel no biocontrole de Sclerotinia sclerotiorum
Keywords in Portuguese
Epl-1
Micoparasitismo
Sclerotinia sclerotiorum
Trichoderma harzianum
Abstract in Portuguese
Fungos da espécie Trichoderma harzianum são estudados como agentes de controle biológico de fitopatógenos que habitam o solo, sendo sua estratégia um processo complexo que pode ocorrer por diferentes mecanismos ou uma combinação deles, incluindo micoparasitismo. Neste trabalho, foram analisadas consequências da deleção do gene que codifica a proteína Epl-1, descrita como elicitora de resistência em plantas nos processos de: modulação da expressão de genes envolvidos no processo de micoparasitismo de T. harzianum contra o fungo fitopatogênico Sclerotinia sclerotiorum; estabelecimento do processo de micoparasitismo; interação entre T. harzianum e plantas de feijão comum. Os resultados mostram que a deleção do gene epl-1 alterou a modulação da expressão de todos os genes relacionados ao processo de micoparasitismo analisados. Além disso, Epl-1 apresentou um papel no processo de modulação de expressão desses genes em T. harzianum, no reconhecimento da própria parede celular e da parede de diferentes hospedeiros, na interação com fitopatógenos hospedeiros, no processo de formação de estruturas de micoparasitismo, bem como na indução de resistência local e sistêmica em plantas de feijão comum
Title in English
Study of Trichoderma harzianum genes associated with mycoparasitism and its role in biocontrol of Sclerotinia sclerotiorum
Keywords in English
Epl-1
Mycoparasitism
Sclerotinia sclerotiorum
Trichoderma harzianum
Abstract in English
Fungal species Trichoderma harzianum, are studied as soilborne plant pathogens biological control agent and its strategy is a complex process, which can occur by different mechanisms or a combination thereof, including mycoparasitism. In this work, the consequences of epl-1 gene deletion, which encoding for Epl-1 protein, described as plants resistance elicitor, were analyzed on: modulation of gene expression involved in T. harzianum mycoparasitism process against phytopathogenic fungus Sclerotinia sclerotiorum; mycoparasitism establishment process and T. harzianum interaction with bean plants. The results showed that epl-1 encoding gene deletion altered the expression modulation of all analyzed genes related to mycoparasitism process. Furthermore, Epl-1 presented a role in modulating expression of these genes in the process of self and host cell wall recognition; the interaction with host plant pathogens in formation of mycoparasitism structures as well as local and systemic resistance in beans plants
 
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Publishing Date
2017-04-03
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • GOMES, E. V., e SILVA, R. N. Expression analysys of genes associated with trichoderma harzianum mycoparasitism process against sclerotinia sclerotiorum. In FEMS 2013 5th Congress of european microbiologists, Leipzig, Germany, 2013. FEMS 2013., 2013. Resumo.
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