Data/hora: 01/06/2024 13:21:45

Biblioteca(s): 	Embrapa Agrobiologia.	
Tipo da produção científica: 	Artigo em Periódico Indexado	
Circulação/Nível: 	Internacional - A	
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