title: Flindersiella endophytica gen. nov., sp. nov., an endophytic actinobacterium isolated from the root of Grey Box, an endemic eucalyptus tree.
abstract: A novel endophytic actinobacterium, designated strain EUM 378(T), was isolated from the surface-sterilized root tissue of Eucalyptus microcarpa, a eucalyptus tree known as Grey Box. Phylogenetic evaluation based on 16S rRNA gene sequence analysis, including alignment with taxon-specific 16S rRNA gene signature nucleotides, placed this isolate as a member of the family Nocardioidaceae. Strain EUM 378(T) showed >5.5 % 16S rRNA gene sequence divergence from other members of this family and was related most closely to Actinopolymorpha alba YIM 48868(T) (94.2 %) and Actinopolymorpha singaporensis IM 7744(T) (94.4 %). This Gram-positive, aerobic actinobacterium has well-developed substrate mycelia that fragment into small rods. Chemotaxonomic data revealed that the cell wall contains LL-diaminopimelic acid, ribose, glucose and rhamnose. MK-10(H₆) is the predominant menaquinone. Chemotaxonomic and phylogenetic evidence confirmed that strain EUM 378(T) represents a novel species of a new genus, for which the name Flindersiella endophytica gen. nov., sp. nov. is proposed. The type strain is EUM 378(T) ( = DSM 45355(T) = ACM 5289(T)).
authors.affiliation: Department of Medical Biotechnology, School of Medicine, Flinders University, Bedford Park SA 5042, Australia.
authors.forename: Onuma
authors.initials: O
authors.lastname: Kaewkla
authors.affiliation: Department of Medical Biotechnology, School of Medicine, Flinders University, Bedford Park SA 5042, Australia.
authors.forename: Christopher M M
authors.initials: CMM
authors.lastname: Franco
mesh_terms: D000192:Actinomycetales / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification* / Q000502:physiology; D000332:Aerobiosis; D015373:Bacterial Typing Techniques; D002473:Cell Wall / Q000737:chemistry; D016000:Cluster Analysis; D004269:DNA, Bacterial / Q000737:chemistry / Q000235:genetics; D004275:DNA, Ribosomal / Q000737:chemistry / Q000235:genetics; D003960:Diaminopimelic Acid / Q000032:analysis; D005052:Eucalyptus / Q000382:microbiology*; D005947:Glucose / Q000032:analysis; D008969:Molecular Sequence Data; D010802:Phylogeny; D018517:Plant Roots / Q000382:microbiology; D011809:Quinones / Q000032:analysis; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012210:Rhamnose / Q000032:analysis; D012266:Ribose / Q000032:analysis; D017422:Sequence Analysis, DNA
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D011809:Quinones; D012336:RNA, Ribosomal, 16S; D003960:Diaminopimelic Acid; D012266:Ribose; D005947:Glucose; D012210:Rhamnose