Data/hora: 07/06/2024 22:17:30

Biblioteca(s): | Embrapa Agrobiologia.
Data corrente: | 27/06/1995
Data da última atualização: | 19/06/2017
Autoria: | TARRAND, J. J.; KRIEG, N. R.; DOBEREINER, J.
Título: | A taxonomic study of the Spirillum lipoferum group, with descriptions of a new genus, Azospirillum gen. nov. and two species, Azospirillum lipoferum (Beijerinck) comb. nov. and Azospirillum brasilense sp. nov.
Ano de publicação: | 1978
Fonte/Imprenta: | Canadian Journal of Microbiology, v.24, n.8, p.967-980, 1978.
Idioma: | Inglês
Conteúdo: | Sixty-one strains of the root-associated nitrogen fixer Spirillum lipoferum exhibited a similar morphology in peptone--succinate salts medium: vibrioid cells having a diameter of 1.0 micrometer. When grown in broth the cells had a single polar flagellum, but when grown on agar at 30 degrees C lateral flagella of shorter wavelength were also formed. The DNA base composition was 69--71 mol% guanine + cytosine when determined by thermal denaturation. DNA homology experiments indicated the occurrence of two distinct but related homology groups: 46 strains were in group I and 15 strains were in group II. Group II strains were distinguished by their ability to use glucose as a sole carbon source for growth in nitrogen-free medium, by their production of an acidic reaction in a peptone-based glucose medium, by their requirement for biotin, and by their formation of wider, longer, S-shaped or helical cells in semisolid nitrogen-free malate medium. The results indicate that two species exist, and on the basis of their characteristics it is proposed that they be assigned to a new genus, Azospirillum. Strians belonging to group II are named A. lipoferum (Beijerinck) comb. nov., while those belonging to group I are named A. brasilense sp. nov. Strain Sp 59b (ATCC29707) is proposed as the neotype strain for A. lipoferum, and strain Sp 7 (ATCC 29145) is proposed as the type strain for A. brasilense.
Palavras-Chave: | UAPNPBS.
Thesagro: | Fisiologia; Gramínea; Raiz; Rizosfera; Taxonomia.
Thesaurus Nal: | Azospirillum brasilense.
Categoria do assunto: | S Ciências Biológicas
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/160851/1/A-taxonomic-study-of-the-Spirillum-lipoferum-group.pdf
Registro original: | Embrapa Agrobiologia (CNPAB)
Exemplares: | CNPAB - (4468-1) - UMT - AP - -- -  -  - 2002948 - DIS