Lacinutrix gracilariae sp. nov., isolated from the surface of a marine red alga Gracilaria sp.

A Gram-stain-negative, aerobic, non-flagellated, rod-shaped bacterium, designated strain Lxc1 T , was isolated from the surface of a marine red alga, Gracilaria sp., which was collected from the coastal regions in Jinjiang, Fujian Province, China. Colonies of the strain were orange-yellow, circular and smooth. The 16S rRNA gene of strain Lxc1 T had maximum sequence similarity with Lacinutrix himadriensis E4-9a T (97.1 %), followed by Lacinutrix jangbogonensis PAMC 27137 T , Lacinutrix copepodicola DJ3 T , Lacinutrix algicola AKS293 T and Lacinutrix mariniflava AKS 432 T (similarities < 96.4 %). Phylogenetic analysis showed strain Lxc1 T formed a tight cluster with L. himadriensis E4-9a T and L. copepodicola DJ3 T , but represented a novel lineage belonging to the genus Lacinutrix . The predominant fatty acids were iso-C 15 : 1 G (18.3 %), iso-C 15 : 0 (16.7 %), iso-C 17 : 0 3-OH (10.6 %) and iso-C 15 : 0 3-OH (8.6 %). Menaquinone-6 (MK-6) was the only respiratory quinone present. The DNA G+C content of strain Lxc1 T was 31.7 mol%. Combining the results above, it was ascertained that strain Lxc1 T represented a novel species of the genus Lacinutrix , for which the name Lacinutrix gracilariae sp. nov. is proposed. The type strain is Lxc1 T ( = MCCC 1A01567 T  = KCTC 42808 T ).