Comparative genomic analysis of the genus Marinomonas and taxonomic study of Marinomonas algarum sp. nov., isolated from red algae Gelidium amansii

Abstract

Members of the genus Marinomonas are known for their environmental adaptation and metabolically versatility, with abundant proteins associated with antifreeze, osmotic pressure resistance, carbohydrase and multiple secondary metabolites. Comparative genomic analysis focusing on secondary metabolites and orthologue proteins were conducted with 30 reference genome sequences in genus Marinomonas. In this study, a Gram-stain-negative, rod-shaped, non-agellated and strictly aerobic bacterium, designated as strain E8 T , was isolated from the red algae (Gelidium amansii) in the coastal of Weihai, China. Optimal growth of the strain E8 T was observed at temperatures 25-30 ℃, pH 6.5-8.0 and 1-3% (w/v) NaCl. The DNA G + C content was 42.8 mol%. The predominant quinone was Q-8 and the major fatty acids were C 16:0 , summed feature 3 and summed feature 8. The main polar lipids were phosphatidylglycerol (PG) and phosphatidylethanolamine (PE). Based on data obtained from this polyphasic taxonomic study, strain E8 T belongs to a novel species of the genus Marinomonas, for which the name Marinomonas algarum is proposed. The type strain is E8 T (= KCTC 92201 T = MCCC 1K07070 T ).

Metagenomics-Based Microbial Ecological Community Threshold and Indicators of Anthropogenic Disturbances in Estuarine Sediments

“…At the phylum level, the largest proportion of decreasers belonged to Proteobacteria ( n = 962; 22.5 ± 2.8% of the relative abundance of the classified species in all of the samples), followed by Planctomycetes ( n = 56; 3.0 ± 0.6%) and Thaumarchaeota ( n = 16; 0.8 ± 0.6%) (Figure a and b). At the genus level under Proteobacteria, the decreasers predominantly belonged to Pseudomonas , followed by many halotolerant genera (e.g., Halomonas and Marinobacter ) and oligotrophic genera (e.g., Caulobacter and Marinomonas ) (Figure S4). Under Planctomycetes, the decreasers were mostly from the Planctomycetaceae and Pirellulaceae families, which are typically found in brackish or marine habitats. − The decreasers belonging to Thaumarchaeota were all ammonia-oxidizing archaea.…”

Diversity and structure of the root-associated bacterial microbiomes of four mangrove tree species, revealed by high-throughput sequencing

“…3C and 4D ). Some members of the genus Marinomonas can adapt to various types of environments and perform a variety of metabolic functions ( Xue et al, 2022 ). As shown in Fig.…”

Rhodoalgimonas zhirmunskyi gen. nov., sp. nov., a Marine Alphaproteobacterium Isolated from the Pacific Red Alga Ahnfeltia tobuchiensis: Phenotypic Characterization and Pan-Genome Analysis

“…Many novel bacterial species associated with different red algae have been described in recent years. The strains belonging to a new genus and species Algibacillus agarilyticus (the family Alteromonadaceae, class Gammaproteobacteria), and two new species Marinomonas algarum (the family Oceanospirillaceae, class Gammaproteobacteria) and Maribacter algarum (the family Flavobacteriaceae, class Flavobacteriia) were isolated from the red alga Gelidium amansii collected from coastal waters in Wenhai (Shandong province, China) [5][6][7]. The novel members of the genera Marinomonas and Maribacter, Marinomonas agarivorans and Maribacter algicola, were also recovered from the surfaces of the red algae Gracillaria bladgettii and Porphyridium marinum, respectively [8,9].…”