Moderately halophilic gram-positive bacterial diversity in hypersaline environments
- PMID: 9783177
- DOI: 10.1007/s007920050072
Moderately halophilic gram-positive bacterial diversity in hypersaline environments
Abstract
Moderately halophilic bacteria are microorganisms that grow optimally in media containing 3%-15% (w/v) salt. They are represented by a heterogeneous group of microorganisms included in many different genera. Gram-negative moderately halophilic bacteria have been studied in more detail, but studies on gram-positive species are more scarce. Recent studies carried out by our research group on gram-positive moderate halophiles have permitted clarifying their taxonomic and phylogenetic position and describing new species. Thus, we have isolated six strains from ponds of salterns that show phenotypic and genotypic characteristics similar to those of Nesterenkonia halobia (formerly Micrococcus halobius), a moderately halophilic gram-positive coccus that was described on the basis of a single strain. Our data demonstrate quite clearly that they are members of this species and contribute to a better description of these moderately halophilic cocci. Similarly, a study of a large number of gram-positive moderately halophilic rods that were able to produce endospores led us to describe a new species, designated Bacillus salexigens. Further, isolates grouped in other three phenons, obtained by numerical taxonomy analysis and showing phenotypic features quite similar to those of this species, represent different genomovars, with very low DNA-DNA homology. Although they might represent additional new species, it will be necessary to determine new phenotypic features to differentiate them from previously described Bacillus species. We have also studied the viability of some old enrichments provided by B.E. Volcani, which were set up in 1936. We isolated 31 gram-positive motile endospore-forming rods that, according to their phenotypic characteristics, could represent a new species of the genus Bacillus.
Similar articles
-
Polyphasic taxonomy of Nesterenkonia halobia.Int J Syst Bacteriol. 1997 Oct;47(4):1231-5. doi: 10.1099/00207713-47-4-1231. Int J Syst Bacteriol. 1997. PMID: 9336934
-
Bacillus salexigens sp. nov., a new moderately halophilic Bacillus species.Int J Syst Bacteriol. 1997 Jul;47(3):735-41. doi: 10.1099/00207713-47-3-735. Int J Syst Bacteriol. 1997. PMID: 9226905
-
Numerical taxonomy of moderately halophilic gram-positive cocci isolated from the Salar de Atacama (Chile).Microbiologia. 1991 Jun;7(1):35-41. Microbiologia. 1991. PMID: 1867776
-
Taxonomy of halophilic Archaea: current status and future challenges.Extremophiles. 2014 Sep;18(5):825-34. doi: 10.1007/s00792-014-0654-9. Epub 2014 Aug 8. Extremophiles. 2014. PMID: 25102811 Review.
-
Anaerobic bacteria from hypersaline environments.Microbiol Rev. 1994 Mar;58(1):27-38. doi: 10.1128/mr.58.1.27-38.1994. Microbiol Rev. 1994. PMID: 8177169 Free PMC article. Review.
Cited by
-
Characteristics and pathogenicity of Vibrio alginolyticus SWS causing high mortality in mud crab (Scylla serrata) aquaculture in Hong Kong.Front Cell Infect Microbiol. 2024 Jul 23;14:1425104. doi: 10.3389/fcimb.2024.1425104. eCollection 2024. Front Cell Infect Microbiol. 2024. PMID: 39108984 Free PMC article.
-
Salt and Metal Tolerance Involves Formation of Guttation Droplets in Species of the Aspergillus versicolor Complex.Genes (Basel). 2022 Sep 11;13(9):1631. doi: 10.3390/genes13091631. Genes (Basel). 2022. PMID: 36140799 Free PMC article.
-
Synergistic efficacy of alkyltrimethylammonium bromide, chlorhexidine digluconate on diverse bacterial strains causing red-heat and purple-stain deteriorations of leather.Arch Microbiol. 2021 Mar;203(2):629-634. doi: 10.1007/s00203-020-02047-y. Epub 2020 Oct 1. Arch Microbiol. 2021. PMID: 33006037
-
Regulated Iron Siderophore Production of the Halophilic Archaeon Haloferax volcanii.Biomolecules. 2020 Jul 17;10(7):1072. doi: 10.3390/biom10071072. Biomolecules. 2020. PMID: 32709147 Free PMC article.
-
A Differential Metabarcoding Approach to Describe Taxonomy Profiles of Bacteria and Archaea in the Saltern of Margherita di Savoia (Italy).Microorganisms. 2020 Jun 22;8(6):936. doi: 10.3390/microorganisms8060936. Microorganisms. 2020. PMID: 32580393 Free PMC article.