title: Ochrobactrum cytisi sp. nov., isolated from nodules of Cytisus scoparius in Spain.
abstract: Two strains named ESC1(T) and ESC5 were isolated from nodules of Cytisus scoparius growing in a Spanish soil. Phylogenetic analysis of the 16S rRNA gene showed that these strains belong to the genus Ochrobactrum, their closest relatives being Ochrobactrum anthropi and Ochrobactrum lupini, with 100 and 99.9 % similarity to the respective type strains. Despite this high similarity, the results of DNA-DNA hybridization, phenotypic tests and fatty acid analyses showed that these strains represent a novel species of genus Ochrobactrum. The DNA-DNA hybridization values were respectively 70, 66 and 55 % with respect to O. lupini LUP21(T), O. anthropi DSM 6882(T) and Ochrobactrum tritici DSM 13340(T). The predominant fatty acids were C(18 : 1)omega7c and C(18 : 1) 2-OH. Strains ESC1(T) and ESC5 were strictly aerobic and were able to reduce nitrate and to hydrolyse aesculin. They produced beta-galactosidase and beta-glucosidase and did not produce urease after 48 h incubation. The G+C content of strain ESC1(T) was 56.4 mol%. Both strains ESC1(T) and ESC5 contained nodD and nifH genes on megaplasmids that were related phylogenetically to those of rhizobial strains nodulating Phaseolus, Leucaena, Trifolium and Lupinus. From the results of this work, we propose that the strains isolated in this study be included in a novel species named Ochrobactrum cytisi sp. nov. The type strain is ESC1(T) (=LMG 22713(T)=CECT 7172(T)).
authors: Departamento de Microbiología y Genética, Universidad de Salamanca, Salamanca, Spain.
authors: José Luis
authors: JL
authors: Zurdo-Piñeiro
authors: Departamento de Microbiología y Genética, Universidad de Salamanca, Salamanca, Spain.
authors: Raúl
authors: R
authors: Rivas
authors: Departamento de Microbiología y Genética, Universidad de Salamanca, Salamanca, Spain.
authors: Martha E
authors: ME
authors: Trujillo
authors: Departamento de Microbiología y Genética, Universidad de Salamanca, Salamanca, Spain.
authors: Nieves
authors: N
authors: Vizcaíno
authors: CIFA Las Torres, Alcalá del Río, Sevilla, Spain.
authors: José Antonio
authors: JA
authors: Carrasco
authors: CIFA Las Torres, Alcalá del Río, Sevilla, Spain.
authors: Manuel
authors: M
authors: Chamber
authors: Departamento de Microbiología y Parasitología, Facultad de Farmacia, Universidad de Sevilla, Sevilla, Spain.
authors: Antonio
authors: A
authors: Palomares
authors: Departamento de Microbiología y Genética, Universidad de Salamanca, Salamanca, Spain.
authors: Pedro F
authors: PF
authors: Mateos
authors: Departamento de Microbiología y Genética, Universidad de Salamanca, Salamanca, Spain.
authors: Eustoquio
authors: E
authors: Martínez-Molina
authors: Departamento de Microbiología y Genética, Universidad de Salamanca, Salamanca, Spain.
authors: Encarna
authors: E
authors: Velázquez
mesh_terms: D001482:Base Composition; D029865:Cytisus / Q000382:microbiology*; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D008969:Molecular Sequence Data; D042041:Ochrobactrum / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D010802:Phylogeny; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012988:Soil Microbiology; D013030:Spain
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D012336:RNA, Ribosomal, 16S