Halophiles, Industrial Applications

DasSarma, Priya; Coker, James; Huse, Valerie; DasSarma, Shiladitya

doi:10.1002/9780470054581.eib439

Cited by 34 publications

(27 citation statements)

References 84 publications

(110 reference statements)

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“…Microbial research in saline environments is important for several reasons: i) there are potential biotechnological applications of halophilic microorganisms [18,19]; ii) knowledge about microbial diversity in terrestrial saline environments may shed light on the properties of salt deposits and saline environments found on Mars [20,21]; and iii) primitive life on earth might have started in this kind of extreme environment, so these systems are ideal to understand the evolution of the biosphere on Earth [22]. …”

Section: Introductionmentioning

confidence: 99%

Biodiversity of Archaea and floral of two inland saltern ecosystems in the Alto Vinalopó Valley, Spain

et al. 2010

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BackgroundThe extraction of salt from seawater by means of coastal solar salterns is a very well-described process. Moreover, the characterization of these environments from ecological, biochemical and microbiological perspectives has become a key focus for many research groups all over the world over the last 20 years. In countries such as Spain, there are several examples of coastal solar salterns (mainly on the Mediterranean coast) and inland solar salterns, from which sodium chloride is obtained for human consumption. However, studies focused on the characterization of inland solar salterns are scarce and both the archaeal diversity and the plant communities inhabiting these environments remain poorly described.ResultsTwo of the inland solar salterns (termed Redonda and Penalva), located in the Alto Vinalopó Valley (Alicante, Spain), were characterized regarding their geological and physico-chemical characteristics and their archaeal and botanical biodiversity. A preliminary eukaryotic diversity survey was also performed using saline water. The chemical characterization of the brine has revealed that the salted groundwater extracted to fill these inland solar salterns is thalassohaline. The plant communities living in this environment are dominated by Sarcocornia fruticosa (L.) A.J. Scott, Arthrocnemum macrostachyum (Moris) K. Koch, Suaeda vera Forsk. ex Gmelin (Amaranthaceae) and several species of Limonium (Mill) and Tamarix (L). Archaeal diversity was analyzed and compared by polymerase chain reaction (PCR)-based molecular phylogenetic techniques. Most of the sequences recovered from environmental DNA samples are affiliated with haloarchaeal genera such as Haloarcula, Halorubrum, Haloquadratum and Halobacterium, and with an unclassified member of the Halobacteriaceae. The eukaryote Dunaliella was also present in the samples.ConclusionsTo our knowledge, this study constitutes the first analysis centered on inland solar salterns located in the southeastern region of Spain. The results obtained revealed that the salt deposits of this region have marine origins. Plant communities typical of salt marshes are present in this ecosystem and members of the Halobacteriaceae family can be easily detected in the microbial populations of these habitats. Possible origins of the haloarchaea detected in this study are discussed.

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Section: Introductionmentioning

confidence: 99%

Biodiversity of Archaea and floral of two inland saltern ecosystems in the Alto Vinalopó Valley, Spain

et al. 2010

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“…Here, the isolates showed growth in the presence of 20% and 10% concentrations of NaCl respectively. DasSarma et al (2010) have discussed various applications of halotolerant bacteria. Such physiological characteristics make these isolates potential candidates for production of enzymes and other biomolecules that may exhibit stability under Synthesis of PUFAs is one of the important adaptation strategies of microbes from polar habitats.…”

Section: Resultsmentioning

confidence: 99%

Identification and biotechnological potential of psychrotrophic marine isolates

Pote¹,

Chaudhary²,

Upadhayay³

et al. 2014

Eurasia J Biosci

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“…, Haloferax mediteranei , Natrialba asiatica , Natrialba magadii , Natronococcus occultus , and Natronomonas pharaonis (DasSarma et al 2010 ). For example; Serine protease from Halobacterium salinarum was the fi rst extracellular hydrolase identifi ed from an extremely halophilic archaeon, requires 4 M NaCl for optimal catalytic activity and stability with yields of up to 76 % in an environment with low water activity.…”

Section: Proteasesmentioning

confidence: 98%

“…The Dead Sea is smaller (800 km 2 ) and deeper (340 m), and contains a very high concentration of magnesium salts. Both of these lakes are close to neutral pH, although the Great Salt Lake is slightly alkaline while the Dead Sea is slightly acidic (DasSarma and Arora 2001 ). Several alkaline hypersaline soda brines exist such as Great Basin lakes of USA, Lake Magadi of Kenya, Sambhar Lake of India etc.…”

mentioning

confidence: 96%

Perspectives and Application of Halophilic Enzymes

Patel

Saraf

2015

Sustainable Development and Biodiversity

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The world of halophilic bacteria is quite diverse. We fi nd representatives of three domains of life, archaea, bacteria and eukarya that are adapted to salt concentration upto saturation. The micro-organisms able to grow upto NaCl concentration (>300 g/l) are found all over the small subunit rRNA based tree of life. Their metabolic diversity is high as well encompassing oxygenic and anoxygenic phototrophs, aerobic heterotrophs, denitrifi ers, sulfate reducers, fermenters and methanogens. The proteins of halophilic bacteria are magnifi cently engineered to function in a milieu containing 2-5 M salt. The proteins and encoding genes of halophiles represent a valuable repository and resource for reconstruction and visualizing processes of habitat selection and adaptive evolution. Search for new enzymes endowed with novel activities and enhanced stability continues to be desirable character for important commercial production. These poly extremophiles are excellent source of enzymes and metabolites possessing inherent ability to function in extreme conditions viz high salt, alkaline pH and facilitating catalysis for biotechnological application in food processing, industrial bioconversion and bioremediation. In brief, we have just begun to realize the great potential and true extent of diversity and suitable industrial applications possible from halophiles.

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Halophiles, Industrial Applications

Abstract: Please note that the abstract and keywords will not be included in the printed book, but are required for the online presentation of this book which will be published on Wiley's own online publishing platform.

Cited by 34 publications

References 84 publications

Biodiversity of Archaea and floral of two inland saltern ecosystems in the Alto Vinalopó Valley, Spain

Biodiversity of Archaea and floral of two inland saltern ecosystems in the Alto Vinalopó Valley, Spain

Identification and biotechnological potential of psychrotrophic marine isolates

Perspectives and Application of Halophilic Enzymes

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