Data/hora: 10/06/2024 17:04:08

Biblioteca(s): | Embrapa Arroz e Feijão.
Data corrente: | 27/09/2023
Data da última atualização: | 27/09/2023
Autoria: | CÔRTES, M. V. de C. B.; BARBOSA, E. T.; OLIVEIRA, M. I. de S.; MACIEL, L. H. R.; LOBO JUNIOR, M.; CONTESINI, F. J.; FILIPPI, M. C. C. de; SILVA-LOBO, V. L.
Afiliação: | MARCIO VINICIUS DE C BARROS CORTES, CNPAF; ELDER TADEU BARBOSA, CNPAF; MAYTHSULENE INACIO DE SOUSA OLIVEIRA; LIRIEL HELEN RODRIGUES MACIEL, UNIVERSIDADE FEDERAL DE GOIÁS; MURILLO LOBO JUNIOR, CNPAF; FABIANO JARES CONTESINI, UNIVERSITY OF DENMARK; MARTA CRISTINA CORSI DE FILIPPI, CNPAF; VALACIA LEMES DA SILVA LOBO, CNPAF.
Título: | Trichoderma harzianum marker-free strain construction based on efficient CRISPR/Cas9 recyclable system: A helpful tool for the study of biological control agents.
Ano de publicação: | 2023
Fonte/Imprenta: | Biological Control, v. 184, 105281, Sept. 2023.
ISSN: | 1049-9644
DOI: | https://doi.org/10.1016/j.biocontrol.2023.105281
Idioma: | Inglês
Conteúdo: | This article reports the first successful marker-free genetic engineering of Trichoderma harzianum, a widely studied biocontrol agent with great potential for use in sustainable agriculture. T. harzianum has been shown to control plant diseases, promote plant growth, and improve plant tolerance to abiotic stress. A specific CRISPR/Cas9 gene-editing system, based in self-replicative AMA1-plasmid, was used to generate T. harzianum mutant strains, targeting the albA (pks4) and ku70 genes, involved in melanin synthesis and non-homologous end joining DNA repair pathway, respectively. The resulting albA-deficient strain displayed a loss of pigmentation in their conidia, confirming phenotypically and genotypically the efficacy of the CRISPR/Cas9 system in generating targeted gene knockouts in T. harzianum. A marker-free ?ku70 strain was also constructed, with the maintenance of its original fitness, providing a helpful tool for precise genetic engineering in T. harzianum, due to NHEJ-deficiency, able to be used in in vitro and in vivo (in planta) studies. The study highlights the potential of using CRISPR/Cas9 technology to facilitate the study of the molecular processes involved in the biocontrol and plant growth-promoting properties of T. harzianum.
Palavras-Chave: | AMA1-plasmid; Biocontrol; Gene edition; Molecular technology; NHEJ.
Thesagro: | Genética Molecular; Trichoderma Harzianum.
Thesaurus Nal: | Abiotic stress; Genetic engineering; Plant growth-promoting rhizobacteria.
Categoria do assunto: | X Pesquisa, Tecnologia e Engenharia
Registro original: | Embrapa Arroz e Feijão (CNPAF)
Exemplares: | CNPAF - (36794-1) - UPC - AP - DD - 2023 -  - 2023 - DIS