Haloalkaliphilic Bacteria: Molecular Diversity and Biotechnological Applications

Purohit, Megha K.; Raval, Vikram H.; Singh, Satya Prakash

doi:10.1007/978-3-642-41837-2_4

Cited by 9 publications

(9 citation statements)

References 86 publications

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“…Hypersaline environments such as salt lakes, hypersaline ponds and saline-alkali soils (Ghai et al 2011;Shi et al 2012;El Hidri et al 2013;Purohit et al 2014) are distributed worldwide and contain a large number of microorganisms from all domains of life called halophiles, well adapted to these hostile conditions (Yin et al 2015). Halophiles have been divided in two groups dependent on their tolerance to salt.…”

Section: Introductionmentioning

confidence: 99%

“…Halophiles have been divided in two groups dependent on their tolerance to salt. Halotolerant, when they are able to grow at high salt concentrations but do not require it for growth (Purohit et al 2014) and extreme halophiles that require high salt concentrations for growth. Most halophilic bacteria belong to the Firmicutes (e.g., Bacillus, Oceanobacillus, Alkalibacillus, Virgibacillus, Halobacillus), Actinobacteria (e.g., Leucobacter, Arthrobacter and Nesterenkonia) or Proteobacteria (i.e., Halomonas, Chromohalobacter and Halovibrio) (Romano et al 1996;Yumoto et al 2005;Gonzalez-Domenech et al 2009;Luo et al 2009;Whon et al 2010;Tang et al 2011;El Hidri et al 2013;Govender et al 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Most halophilic bacteria belong to the Firmicutes (e.g., Bacillus, Oceanobacillus, Alkalibacillus, Virgibacillus, Halobacillus), Actinobacteria (e.g., Leucobacter, Arthrobacter and Nesterenkonia) or Proteobacteria (i.e., Halomonas, Chromohalobacter and Halovibrio) (Romano et al 1996;Yumoto et al 2005;Gonzalez-Domenech et al 2009;Luo et al 2009;Whon et al 2010;Tang et al 2011;El Hidri et al 2013;Govender et al 2013). Halophiles can also be alkaliphiles that grow optimally at pH 9 but are unable to grow at pH 7 or alkalitolerant with an optimal growth at a neutral pH but that can grow at pH 10 (Purohit et al 2014).…”

Section: Introductionmentioning

confidence: 99%

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Bioprospecting of haloalkaliphilic microorganisms isolated from a dried-out maar in the volcano “Hoya Rincón de Parangueo”

Gómez-Acata

Ayala-Gámez

García-Covarrubias

et al. 2021

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Halophiles can be found in hypersaline environments and they can synthesize products of industrial interest. Method: In this work, 37 bacterial strains were isolated from the sediment of a dried-out maar of the “Hoya Rincón de Parangueo” (Mexico) on different culture media with 20% NaCl and pH 9, while potential industrial extracellular enzymes were determined. Results: Eight genera Salsuginibacillus, Alkalibacillus, Bacillus, Staphylococcus, Oceanobacillus, Halomonas and Nesterenkonia besides 15 distinct species belonging to Actinobacteria, Firmicutes and Proteobacteria were identified. The L371, LTA7 and SU3 isolates produced proteases, M20, L5, L7, L8, Y1, Y2, M3, M9 and RA lipases, LTA4 and SU3 amylases, while LTA7, Y2, M5, M9 and RA caseinases with enzymatic activity at pH 9. Production of siderophore was found in 17 isolates. Discussion or Conclusion: It is reported for the first experimental evidence of siderophores production by N. alba, Alkalibacillus and Oceanobacillus at 6% NaCl (w/v). Isolates RE, RG1, RG2, RH1, RA and I11 showed 2.8% to 4.1% genetic distance with Nesterenkonia species and might represent new species.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bioprospecting of haloalkaliphilic microorganisms isolated from a dried-out maar in the volcano “Hoya Rincón de Parangueo”

Gómez-Acata

Ayala-Gámez

García-Covarrubias

et al. 2021

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“…The ability of the isolates to produce various groups of enzymes at elevated temperatures, high salinity, and high pH shows their potential in the biotechnological application. Production of extracellular enzymes has been reported in haloalkaliphiles and halophiles . Bacillus and Halobacillus from Soltan lake in Iran were previously described as the most predominant producing hydrolases .…”

Section: Discussionmentioning

confidence: 99%

“…Isolates B84, B370, B411, and B719 affiliated to B. agaradhaerens, A. psychrotolerans, Bacillus bogoriensis, and H desiderata showed enzymatic activity for pectinase, amylase, protease, xanthanase, cellulase, esterase, and lipase. The ability of the isolates to produce various groups of enzymes at [26].…”

Section: Discussionmentioning

confidence: 99%

Diversity of esterase and lipase producing haloalkaliphilic bacteria from Lake Magadi in Kenya

et al. 2019

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Lipids are hydrocarbons comprised of long‐chain fatty acids and are found in all living things. In the environment, microorganisms degrade them to obtain energy using esterases and lipases. These enzymes are nowadays used in different industrial applications. We report isolation of 24 bacteria with esteresic and lipolytic activity from Lake Magadi, Kenya. The isolates were characterised using morphological, biochemical, and molecular methods. Isolates grew at an optimum salt concentration of 5–8% (w/v), pH range of 8.0–9.0, and temperature range of 35–40°C. The isolates were positive for esterase and lipase assay as well as other extracellular enzymes. Phylogenetic analysis of the 16S ribosomal RNA gene showed that the isolates were affiliated to the genus Bacillus, Alkalibacterium, Staphylococcus, Micrococcus, Halomonas, and Alkalilimnicola. None of the bacterial isolates produced antimicrobial agents, and all of them were resistant to trimethoprim and nalidixic acid but susceptible to streptomycin, amoxillin, chloramphenicol, and cefotaxime. Growth at elevated pH, salt, and temperature is an indicator that the enzymes from these organisms could function well under haloalkaline conditions. Therefore, Lake Magadi could be a good source of isolates with the potential to produce unique biocatalysts for the biotechnology industry.

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Halotolerant Bacteria from Genus Nesterenkonia sandarakina VSA9 as a Potential Polyhydroxyalkanoate Producer

Kankonkar,

Khandeparker

2024

Curr Microbiol

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Haloalkaliphilic Bacteria: Molecular Diversity and Biotechnological Applications

Cited by 9 publications

References 86 publications

Bioprospecting of haloalkaliphilic microorganisms isolated from a dried-out maar in the volcano “Hoya Rincón de Parangueo”

Bioprospecting of haloalkaliphilic microorganisms isolated from a dried-out maar in the volcano “Hoya Rincón de Parangueo”

Diversity of esterase and lipase producing haloalkaliphilic bacteria from Lake Magadi in Kenya

Halotolerant Bacteria from Genus Nesterenkonia sandarakina VSA9 as a Potential Polyhydroxyalkanoate Producer

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