title: Micrococcus endophyticus sp. nov., isolated from surface-sterilized Aquilaria sinensis roots.
abstract: A Gram-positive bacterial strain, designated YIM 56238(T), was isolated from plant roots (Aquilaria sinensis), and characterized by using a polyphasic approach. Strain YIM 56238(T) grew optimally at pH 7.0-8.0 and at 28 degrees C. Analysis of the 16S rRNA gene sequence of strain YIM 56238(T) indicated that it belongs to the genus Micrococcus. Chemotaxonomic data strongly supported the classification of this strain within the genus Micrococcus: the cell-wall peptidoglycan contained lysine, glutamic acid, alanine and glycine; the predominant menaquinones were MK-8(H(2)) (63.6 %) and MK-7(H(2)) (21.1 %); the phospholipids were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol and an unknown ninhydrin-negative phospholipid; and the major cellular fatty acids were iso-C(15 : 0) (30.95 %) and anteiso-C(15 : 0) (53.75 %). The G+C content of the genomic DNA was 72.9 mol%. A number of physiological features were found that clearly distinguished strain YIM 56238(T) from recognized species of the genus Micrococcus. DNA-DNA hybridization studies suggested that the novel strain represents a separate genomic species. On the basis of the data, therefore, strain YIM 56238(T) represents a novel species of the genus Micrococcus, for which the name Micrococcus endophyticus sp. nov. is proposed. The type strain is YIM 56238(T) (=DSM 17945(T)=KCTC 19156(T)).
authors.affiliation: The Key Laboratory for Microbial Resources of the Ministry of Education, PR China.
authors.forename: Hua-Hong
authors.initials: HH
authors.lastname: Chen
authors.forename: Guo-Zhen
authors.initials: GZ
authors.lastname: Zhao
authors.forename: Dong-Jin
authors.initials: DJ
authors.lastname: Park
authors.forename: Yu-Qin
authors.initials: YQ
authors.lastname: Zhang
authors.forename: Li-Hua
authors.initials: LH
authors.lastname: Xu
authors.forename: Jae-Chan
authors.initials: JC
authors.lastname: Lee
authors.forename: Chang-Jin
authors.initials: CJ
authors.lastname: Kim
authors.forename: Wen-Jun
authors.initials: WJ
authors.lastname: Li
mesh_terms: D015373:Bacterial Typing Techniques; D001482:Base Composition; D002473:Cell Wall / Q000737:chemistry; D002681:China; D004269:DNA, Bacterial / Q000032:analysis / Q000235:genetics; D005227:Fatty Acids / Q000032:analysis; D020459:Genes, rRNA; D008837:Micrococcus / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification / Q000502:physiology; D008969:Molecular Sequence Data; D009693:Nucleic Acid Hybridization; D010641:Phenotype; D010802:Phylogeny; D018517:Plant Roots / Q000382:microbiology*; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D017422:Sequence Analysis, DNA; D013045:Species Specificity; D029645:Thymelaeaceae / Q000145:classification / Q000382:microbiology*
chemical_list: D004269:DNA, Bacterial; D005227:Fatty Acids; D012336:RNA, Ribosomal, 16S