Data/hora: 19/06/2024 19:55:04

Biblioteca(s): | Embrapa Clima Temperado.
Data corrente: | 10/01/2017
Data da última atualização: | 04/02/2020
Autoria: | MOTA, M. S.; GOMES, C. B.; SOUZA JÚNIOR, I. T.; MOURA, A. B.
Afiliação: | MONALIZE SALETE MOTA; CESAR BAUER GOMES, CPACT; ISMAIL TEODORO SOUZA JÚNIOR; ANDRÉA BITTENCOURT MOURA.
Título: | Bacterial selection for biological control of plant disease: criterion determination and validation.
Ano de publicação: | 2017
Fonte/Imprenta: | Brazilian Journal of Microbiology, v. 48, p. 62-70, 2017.
ISSN: | 1517-8382
Idioma: | Inglês
Conteúdo: | This study aimed to evaluate the biocontrol potential of bacteria isolated from different plant species and soils. The production of compounds related to phytopathogen biocontrol and/or promotion of plant growth in bacterial isolates was evaluated by measuring the production of antimicrobial compounds (ammonia and antibiosis) and hydrolytic enzymes (amylases, lipases, proteases, and chitinases) and phosphate solubilization. Of the 1219 bacterial isolates, 92% produced one or more of the eight compounds evaluated, but only 1% of the isolates produced all the compounds. Proteolytic activity was most frequently observed among the bacterial isolates. Among the compounds which often determine the success of biocontrol, 43% produced compounds which inhibit mycelial growth of Monilinia fructicola, but only 11% hydrolyzed chitin. Bacteria from different plant species (rhizosphere or phylloplane) exhibited differences in the ability to produce the compounds evaluated. Most bacterial isolates with biocontrol potential were isolated from rhizospheric soil. The most ef?cient bacteria (producing at least ?ve compounds related to phytopathogen biocontrol and/or plant growth), 86 in total, were evaluated for their biocontrol potential by observing their ability to kill juvenile Mesocriconema xenoplax. Thus, we clearly observed that bacteria that produced more compounds related to phytopathogen biocontrol and/or plant growth had a higher ef?cacy for nematode biocontrol, which validated the selection strategy used.
Palavras-Chave: | Obligate parasites; Perennial plants; Perennial plantsa; Rhizobacteria; Rizobactéria.
Thesagro: | Doença de Planta.
Thesaurus Nal: | antibiosis; Mesocriconema xenoplax.
Categoria do assunto: | --

URL:

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/210171/1/1517-8382-bjm-48-01-0062.pdf
http://ainfo.cnptia.embrapa.br/digital/bitstream/item/210013/1/1517-8382-bjm-48-01-0062.pdf

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