Influence of salt concentration on the susceptibility of moderately halophilic bacteria to antimicrobials and its potential use for genetic transfer studies

1995 ◽  
Vol 31 (6) ◽  
pp. 365-371 ◽  
Author(s):  
Mar�a-Jos� Coronado ◽  
Carmen Vargas ◽  
Hans J�rg Kunte ◽  
Erwin A. Galinski ◽  
Antonio Ventosa ◽  
...  
Keyword(s):  
Salt Concentration ◽  
Halophilic Bacteria ◽  
Genetic Transfer ◽  
Moderately Halophilic ◽  
Potential Use ◽  
Moderately Halophilic Bacteria

The Synthesis of Poly-β-Hydroxybutyrate by Moderately Halophilic Bacteria Halomonas venusta

2014 ◽  
Vol 1033-1034 ◽  
pp. 306-310 ◽  
Author(s):  
Shuang Gao ◽  
Ling Hua Zhang
Keyword(s):  
Salt Concentration ◽  
Halophilic Bacteria ◽  
Carbon Sources ◽  
Dry Weight ◽  
Phosphate Concentration ◽  
Two Phase ◽  
Moderately Halophilic ◽  
Initial Carbon ◽  
Carbon Nitrogen Ratio ◽  
Moderately Halophilic Bacteria

In this study, poly-β-hydroxybutyrate (PHB) was synthesized by moderately halophilic bacteria Halomonas venusta and identified by 1H-NMR. The effects of different carbon sources, salt concentration, initial carbon nitrogen quality ratio, initial phosphate concentration were studied on the synthesis of PHB. The optimum conditions of the PHB synthesis were detemined. Glucose was as carbon source with the concentration of 80 g/L and salt concentration, initial carbon nitrogen ratio, initial phosphate concentration was 3%, 15 and 1.9 g/L respectively. Under the above conditions, a two-phase synthesis system of PHB was constructed. The PHB synthesis amount and yield of cell dry weight was reached up to 1.5 g/L and 69.19 wt.%, respectively. The efficient synthesis of PHB was realized.

scholarly journals Halobacillus profundi sp. nov. and Halobacillus kuroshimensis sp. nov., moderately halophilic bacteria isolated from a deep-sea methane cold seep

2007 ◽  
Vol 57 (6) ◽  
pp. 1243-1249 ◽  
Author(s):  
Ngoc-Phuc Hua ◽  
Atsuko Kanekiyo ◽  
Katsunori Fujikura ◽  
Hisato Yasuda ◽  
Takeshi Naganuma
Keyword(s):  
Deep Sea ◽  
Sequence Similarity ◽  
Halophilic Bacteria ◽  
Cold Seep ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
High Sequence Similarity ◽  
Moderately Halophilic ◽  
Type Strains ◽  
Moderately Halophilic Bacteria

Two Gram-positive, rod-shaped, moderately halophilic bacteria were isolated from a deep-sea carbonate rock at a methane cold seep in Kuroshima Knoll, Japan. These bacteria, strains IS-Hb4T and IS-Hb7T, were spore-forming and non-motile. They were able to grow at temperatures as low as 9 °C and hydrostatic pressures up to 30 MPa. Based on high sequence similarity of their 16S rRNA genes to those of type strains of the genus Halobacillus, from 96.4 % (strain IS-Hb7T to Halobacillus halophilus NCIMB 9251T) to 99.4 % (strain IS-Hb4T to Halobacillus dabanensis D-8T), the strains were shown to belong to this genus. DNA–DNA relatedness values of 49.5 % and 1.0–33.0 %, respectively, were determined between strains IS-Hb4T and IS-Hb7T and between these strains and other Halobacillus type strains. Both strains showed the major menaquinone MK7 and l-orn–d-Asp cell-wall peptidoglycan type. Straight-chain C16 : 0, unsaturated C16 : 1 ω7c alcohol and C18 : 1 ω7c and cyclopropane C19 : 0 cyc fatty acids were predominant in both strains. The DNA G+C contents of IS-Hb4T and IS-Hb7T were respectively 43.3 and 42.1 mol%. Physiological and biochemical analyses combined with DNA–DNA hybridization results allowed us to place strains IS-Hb4T (=JCM 14154T=DSM 18394T) and IS-Hb7T (=JCM 14155T=DSM 18393T) in the genus Halobacillus as the respective type strains of the novel species Halobacillus profundi sp. nov. and Halobacillus kuroshimensis sp. nov.

scholarly journals Biomineralization of carbonate and phosphate by moderately halophilic bacteria

2007 ◽  
Vol 61 (2) ◽  
pp. 273-284 ◽  
Author(s):  
Mónica Sánchez-Román ◽  
Maria A. Rivadeneyra ◽  
Crisogono Vasconcelos ◽  
Judith A. McKenzie
Keyword(s):  
Halophilic Bacteria ◽  
Moderately Halophilic ◽  
Moderately Halophilic Bacteria

Moderately Halophilic Bacteria and Their Industrially Important Enzymes from the Ancient Ecosystem Badab-e Surt

2019 ◽  
Vol 15 (2) ◽  
pp. 95-105
Author(s):  
Leila Satari Faghihi ◽  
Bagher Seyedalipour ◽  
Salman Ahmady-asbchin ◽  
Gholamhossein Riazi
Keyword(s):  
Halophilic Bacteria ◽  
Moderately Halophilic ◽  
Moderately Halophilic Bacteria

Pigments and isoprenoid compounds in extremely and moderately halophilic bacteria

1974 ◽  
Vol 20 (2) ◽  
pp. 241-245 ◽  
Author(s):  
S. C. Kushwaha ◽  
M. B. Gochnauer ◽  
D. J. Kushner ◽  
M. Kates
Keyword(s):  
Visual Pigment ◽  
Biosynthetic Pathway ◽  
Bacterial Species ◽  
Halophilic Bacteria ◽  
Extreme Halophiles ◽  
Moderately Halophilic ◽  
Quantitative Measurements ◽  
High Concentrations ◽  
Β Carotene ◽  
Moderately Halophilic Bacteria

Quantitative measurements were carried out on pigmented and colorless isoprenoid compounds in several species of extremely and moderately halophilic bacteria. Phytoene was found in most extreme halophiles; it was present in high concentrations in a moderately halophilic coccus (H5) and absent from a moderately halophilic rod (A31C). Only the pigmented extreme halophiles contained β-carotene. Halobacterium cutirubrum contained substantial amounts of lycopene; this compound was present only in small amounts or missing from the other bacteria. Though lycopene is a precursor of β-carotene in plants, there was no correlation between the amounts of lycopene and β-carotene in the different bacterial species. C50 pigments (bacterioruberins) were found only in pigmented extreme halophiles. There was no consistent correlation between the amounts of C40 and C50 compounds in these bacteria. This suggests that the latter may have a biosynthetic pathway independent of the former.Squalene, dihydrosqualene, and tetrahydrosqualene were found in most of the bacteria studied. Menaquinone was found in all species, except the moderately halophilic rod A31C which contained ubiquinone instead. The visual pigment retinal was found in most of the pigmented extreme halophiles, but was not detected in the moderate halophiles.

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