title: Paenibacillus sonchi sp. nov., a nitrogen-fixing species isolated from the rhizosphere of Sonchus oleraceus.
abstract: A nitrogen-fixing bacterium, designated strain X19-5(T), was isolated from rhizosphere soil of Sonchus oleraceus. Phylogenetic analysis based on a fragment of the nifH gene and the full-length 16S rRNA gene sequence revealed that strain X19-5(T) was a member of the genus Paenibacillus. Strain X19-5(T) showed the highest 16S rRNA gene sequence similarity (98.8 %) with Paenibacillus graminis RSA19(T) and below 97 % similarity with other recognized members of the genus. The level of DNA-DNA relatedness between strain X19-5(T) and P. graminis RSA19(T) was 45.7 %. The DNA G+C content of strain X19-5(T) was 46.8 mol%. The major fatty acids were anteiso-C(15 : 0), C(16 : 0) and iso-C(16 : 0). On the basis of its phenotypic characteristics and the level of DNA-DNA hybridization, strain X19-5(T) is considered to represent a novel species of the genus Paenibacillus, for which the name Paenibacillus sonchi sp. nov. is proposed. The type strain is X19-5(T) (=CCBAU 83901(T)=LMG 24727(T)).
authors.affiliation: The State Key Laboratory for Agrobiotechnology, China Agricultural University, Beijing 100094, People's Republic of China.
authors.forename: Yuan-Yuan
authors.initials: YY
authors.lastname: Hong
authors.forename: Yu-Chao
authors.initials: YC
authors.lastname: Ma
authors.forename: Yu-Guang
authors.initials: YG
authors.lastname: Zhou
authors.forename: Fei
authors.initials: F
authors.lastname: Gao
authors.forename: Hong-Can
authors.initials: HC
authors.lastname: Liu
authors.forename: San-Feng
authors.initials: SF
authors.lastname: Chen
mesh_terms: D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D005227:Fatty Acids / Q000737:chemistry / Q000378:metabolism; D008969:Molecular Sequence Data; D009586:Nitrogen Fixation; D056507:Paenibacillus / Q000145:classification / Q000235:genetics / Q000302:isolation & purification* / Q000378:metabolism; D010802:Phylogeny; D018517:Plant Roots / Q000382:microbiology; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012988:Soil Microbiology; D031184:Sonchus / Q000382:microbiology*
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; D012336:RNA, Ribosomal, 16S