1887

Abstract

A bacterial strain, designated gyp-1, was isolated from a mangrove in Taiwan and characterized using the polyphasic taxonomic approach. Cells of gyp-1 were Gram-staining-negative, aerobic, poly-β-hydroxybutyrate-accumulating, non-motile, coccoid or short-rod-shaped and formed cream-coloured colonies. Growth occurred at 15–37 °C (optimum, 25–30 °C), at pH 5.5–7.0 (optimum, pH 6.0) and with 0–4 % NaCl (optimum, 1–2 %). Phylogenetic analyses based on 16S rRNA gene sequences indicated that gyp-1 represented a member of the genus Paracoccus and showed the highest levels of sequence similarity with respect to Paracoccus lutimaris HDM-25 (97.8 %) and Paracoccus aminovorans DM-82 (97.7 %). The major fatty acids (>10 %) of gyp-1 were C18 : 1ω7c and C16 : 0. The polar lipid profile consisted of phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, diphosphatidylglycerol, an unidentified glycolipid and two unidentified phospholipids. The major isoprenoid quinone was Q-10. The DNA G+C content was 64.6 mol%. The DNA–DNA hybridization value for gyp-1 with P. lutimaris HDM-25 and P. aminovorans DM-82 was less than 50 %. Differential phenotypic properties, together with the phylogenetic inference, demonstrate that gyp-1 should be classified as representing a novel species of the genus Paracoccus , for which the name Paracoccus mangrovi sp. nov. is presented. The type strain is gyp-1 (=BCRC 80920=LMG 29172=KCTC 42899).

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2017-08-15
2019-12-06
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