Mariniblastus

Abstract

Ma.ri.ni.blas'tus. L. masc. adj. marinus , marine; Gr. masc. n. blastos , shoot, bud; N.L. masc. n. Mariniblastus , a marine bud‐forming bacterium. Planctomycetes / Planctomycetia / Pirellulales / Pirellulaceae / Mariniblastus The genus Mariniblastus accommodates spherical‐ to ovoid‐shaped Gram‐negative bacteria, which possess in their life cycle unicellular nonmotile forms and rosettes. The colonies are small, circular, translucent, and nonpigmented to light‐pink pigmented. Reproduction is by budding. Crateriform structures are distributed on the reproductive cell poles; fimbriae and holdfast structures are also present. These bacteria are chemoheterotrophic, aerobic, neutrophilic (pH 7.5), and mesophilic (25°C). Sea salts are requited for growth. Growth substrates are sugars, polyols, and amino acids. The major fatty acids are C 18:1 ω9 c , C 14:0 , and C 16:0 . The major polar lipids are phosphatidylglycerol (PG) and two unknown lipids. Menaquinone 5 (MK‐5) is the main respiratory quinone, but MK‐6 is also present. This genus belongs to the class Planctomycetia , order Pirellulales , and family Pirellulaceae . Members of the genus are present in marine habitats in association with macroalgae, sponges, and corals. DNA G + C content (mol%) : 53.4 ( Genome sequence ). Type species : Mariniblastus fucicola Lage et al. 2017 VP .