title: Variovorax guangxiensis sp. nov., an aerobic, 1-aminocyclopropane-1-carboxylate deaminase producing bacterium isolated from banana rhizosphere.
abstract: A 1-aminocyclopropane-1-carboxylate deaminase producing bacterium, designated GXGD002(T), was isolated from the rhizosphere of banana plants cultivated in Guangxi province, China. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain GXGD002(T) is a member of the genus Variovorax. High levels of 16S rRNA gene sequence similarity are found between strain GXGD002(T) and Variovorax paradoxus DSM 30034(T) (99.4 %), Variovorax ginsengisoli KCTC 12583(T) (99.1 %), Variovorax boronicumulans KCTC 22010(T) (99.0 %), Variovorax soli DSM18216(T) (98.7 %), Variovorax defluvii DSM 27259(T) (98.1 %) and Variovorax dokdonensis KCTC 12544(T) (97.4 %) respectively. However, the DNA-DNA hybridization values between strain GXGD002(T) and its closely related species V. paradoxus DSM 30034(T), V. ginsengisoli KCTC 12583(T) and V. boronicumulans KCTC 22010(T) were found to be 40.7, 30.9 and 23.7 %, respectively. The DNA G + C content of strain GXGD002(T) was found to be 67.8 mol%. The major fatty acids of strain GXGD002(T) are C16:0 (20.3 %), C10:0 3OH (18.4 %), C17:0 cyclo (18.9 %), C18:1w7c (12.3 %) and summed feature 3 (13.9 %). The predominant respiratory quinone was identified as ubiquinone-8 (Q-8) and the major polar lipids as phosphatidylethanolamine and phosphatidylglycerol. The results of polyphasic taxonomic study including physiological and biochemical tests, whole-cell SDS-PAGE profiles and chemotaxonomic analysis allowed a clear differentiation of strain GXGD002(T) from the other species in the genus Variovorax. Based on these results, a new species, Variovorax guangxiensis, is proposed. The type strain is GXGD002(T) (=DSM 27352(T) = ACCC 05911(T)).
authors.affiliation: Beijing Agro- Biotechnology Research Center, Beijing Academy of Agriculture and Forestry Science/Beijing Municipal Key Laboratory of Agricultural Gene Resources and Biotechnology, Beijing, 100097, People's Republic of China.
authors.forename: Jun-lian
authors.initials: JL
authors.lastname: Gao
authors.forename: Mei
authors.initials: M
authors.lastname: Yuan
authors.forename: Xu-ming
authors.initials: XM
authors.lastname: Wang
authors.forename: Tian-lei
authors.initials: TL
authors.lastname: Qiu
authors.forename: Ji-wei
authors.initials: JW
authors.lastname: Li
authors.forename: Hong-can
authors.initials: HC
authors.lastname: Liu
authors.forename: Xiu-ai
authors.initials: XA
authors.lastname: Li
authors.forename: Jian
authors.initials: J
authors.lastname: Chen
authors.forename: Jian-guang
authors.initials: JG
authors.lastname: Sun
mesh_terms: D015373:Bacterial Typing Techniques; D001482:Base Composition; D019755:Carbon-Carbon Lyases / Q000378:metabolism*; D002681:China; D016000:Cluster Analysis; D042621:Comamonadaceae / Q000145:classification* / Q000201:enzymology / Q000235:genetics / Q000302:isolation & purification*; D003600:Cytosol / Q000737:chemistry; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D005227:Fatty Acids / Q000032:analysis; D008969:Molecular Sequence Data; D028521:Musa; D009693:Nucleic Acid Hybridization; D010743:Phospholipids / Q000032:analysis; D010802:Phylogeny; D011809:Quinones / Q000032:analysis; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D058441:Rhizosphere; D017422:Sequence Analysis, DNA; D012988:Soil Microbiology
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D005227:Fatty Acids; D010743:Phospholipids; D011809:Quinones; D012336:RNA, Ribosomal, 16S; C033634:1-aminocyclopropane-1-carboxylate deaminase; D019755:Carbon-Carbon Lyases