Data/hora: 16/06/2024 07:55:48

Biblioteca(s): | Epagri-Sede.
Data corrente: | 19/06/2017
Data da última atualização: | 19/06/2017
Autoria: | MACHADO, R. G.; SÁ, E. L. S.; OLDRA, S.; COSTA, M. D.; DALL¿AGNOL, G.; SANTOS, N. S.; SILVA, W. R.
Título: | Rhizobia isolation and selection for serradella (Ornithopus micranthus) in Southern Brazil.
Ano de publicação: | 2016
Fonte/Imprenta: | African Journal of Microbiology Research, Ebène, v. 10, n. 45, p. 1894-1907, 2016.
Idioma: | Inglês

Conteúdo:

Serradella is a plant that belongs to the Fabaceae family, with recognized forage value and has the
ability to associate symbiotically with rhizobia. The objective of this study was to isolate, authenticate
and select effective rhizobia obtained from native serradella (Ornithopus micranthus) to reduce the
need for mineral fertilizer. Nodules, roots of serradella and rhizosphere soil samples were collected in
seven municipalities from Rio Grande do Sul and Santa Catarina states. Bacterial colonies were
isolated and identified based on morphological characteristics. The authentification and initial selection
of rhizobia were conducted in vitro. The most promising strains from the in vitro study were evaluated
in a greenhouse experiment for 60 days. Among the 148 bacterial cultures characterized, 113 induced
the formation of nodules in serradella while 32 isolate effectively increased fresh mass of plants under
in vitro conditions. The strains UFRGS Om57, UFRGS Om59 and UFRGS Om148 formed nodules with
greater dry mass and produced high dry mass of plants (shoots and roots) which allowed greater
accumulation of N in the shoots.

Palavras-Chave: | biological fixation of nitrogen; Ornithopus micrantus; pasture; Plant growth promoting rhizobacteria (PGPR).
Categoria do assunto: | G Melhoramento Genético
URL: | http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_39262.pdf
Registro original: | Epagri-Sede (Epagri-Sede)
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