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Abstract
A Gram-stain-negative, aerobic, non-flagellated, rod-shaped bacterium, designated strain Lxc1T, 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 Lxc1T had maximum sequence similarity with Lacinutrix himadriensis E4-9aT (97.1 %), followed by Lacinutrix jangbogonensis PAMC 27137T, Lacinutrix copepodicola DJ3T, Lacinutrix algicola AKS293T and Lacinutrix mariniflava AKS 432T (similarities < 96.4 %). Phylogenetic analysis showed strain Lxc1T formed a tight cluster with L. himadriensis E4-9aT and L. copepodicola DJ3T, but represented a novel lineage belonging to the genus Lacinutrix. The predominant fatty acids were iso-C15 : 1 G (18.3 %), iso-C15 : 0 (16.7 %), iso-C17 : 0 3-OH (10.6 %) and iso-C15 : 0 3-OH (8.6 %). Menaquinone-6 (MK-6) was the only respiratory quinone present. The DNA G+C content of strain Lxc1T was 31.7 mol%. Combining the results above, it was ascertained that strain Lxc1T represented a novel species of the genus Lacinutrix, for which the name Lacinutrix gracilariae sp. nov. is proposed. The type strain is Lxc1T ( = MCCC 1A01567T = KCTC 42808T).
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