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

Zafrilla, Basilio; Martínez‐Espinosa, Rosa María; Alonso, María Ángeles; Bonete, Marı́a José

doi:10.1186/1746-1448-6-10

Cited by 37 publications

(27 citation statements)

References 40 publications

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“…Many reports have focussed on the occurrence of halophilic archaea in hypersaline regions (Munson et al 1997;Ochsenreiter et al 2002;Ahmad et al 2008;Braganca and Furtado 2009;Oh et al 2010;Zafrilla et al 2010). However, information on what happens to the bacterial community in increasing salinity gradients from 2 to 30 % are limited (Henriques et al 2006;Demergasso et al 2008;Deshmukh et al 2011;Boujelben et al 2012).…”

Section: Introductionmentioning

confidence: 97%

Comparison of bacterial diversity from solar salterns and a simulated laboratory study

et al. 2014

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Bacterial diversity in solar salterns and a simulated solar saltern under laboratory conditions was studied. The two systems were compared at the pre-salt harvesting phase and salt harvesting phase using Denaturing Gradient Gel Electrophoresis (DGGE). Bacterial composition was dominated by Gammaproteobacteria and more specifically with members of Alteromonas, Vibrio, Pseudomonas, Tolum on as, Marinobacter, Pseudoalteromonas and novel uncultured bacteria. The Shannon-Weaver index (H), Simpson diversity index (D) and Equitability index (E) values showed that salterns can support a wide range of microbes during the pre-salt harvesting phase (3-4 % salinity) when compared to the salt harvesting phase (21-29 % salinity). Range-weighted richness (Rr) values indicated that solar salterns are habitable only by a limited group of microbes as they have medium richness, indicated by physico-chemical characteristics. Principal Coordinate Analysis (PCO) of the simulated study showed a variation in diversity at a large scale with increase in salinity. Solar salterns as well as the simulated tank showed more diversity during the pre-salt harvesting phase.

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Section: Introductionmentioning

confidence: 97%

Comparison of bacterial diversity from solar salterns and a simulated laboratory study

et al. 2014

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“…In fact, several strides have been made to isolate actinomycetes from saline environments and most of them turn out to have potential biotechnological applications (Gulder and Moore, 2010; Vijayakumar et al, 2012; Hamedi et al, 2013). Solar salterns are unique hypersaline environments, characterized by their high salt concentration and alkaline pH (Zafrilla et al, 2010). In India, there are many coastal and inland solar salterns from which salt is produced for human consumption and industrial needs.…”

Section: Introductionmentioning

confidence: 99%

Phylogenetic appraisal of antagonistic, slow growing actinomycetes isolated from hypersaline inland solar salterns at Sambhar salt Lake, India

Jose¹,

Jebakumar²

2013

Front. Microbiol.

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Inland solar salterns established in the vicinity of Sambhar Lake are extreme saline environments with high salinity and alkalinity. In view of the fact that microbes inhabiting such extreme saline environments flourish the contemporary bioprospecting, it was aimed to selectively isolate slow growing and rare actinomycetes from the unexplored solar salterns. A total of 14 slow growing actinomycetes were selectively isolated from three composite soil samples of inland solar salterns. Among the isolates, four groups were formed according to similarity of the banding patterns obtained by amplified ribosomal DNA restriction analysis (ARDRA). A subset of representative isolates for each ARDRA group was identified using 16S rDNA sequence based phylogenetic analysis and subsequently the entire isolates were assigned under three different genera; Streptomyces, Pseudonocardia, and Actinoalloteichus. The genus Streptomyces was found to be the dominant among the isolates. Furthermore, rare actinomycete genus Actinoalloteichus was isolated for the first time from solar saltern. Determination of salt-tolerance revealed that certain level of salt-tolerance and moderate halophilism occurs among the actinomycetes isolated from the inland salterns. In addition, all the acinomycetes were screened in two levels to unravel their ability to produce antimicrobial compounds. Significant antimicrobial activity was found among the actinomycetes against a range of bacteria and fungi to worth further characterization of these persuasive actinomycetes and their antimicrobial secondary metabolites. In a nutshell, this study offered a first interesting insight on occurrence of antagonistic rare actinomycetes and streptomycetes in inland solar salterns associated with Sambhar salt Lake.

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“…Organisms termed halophilic will not grow in the absence of high salt concentrations, usually greater than 1.0–1.5 M NaCl [ 9 ]. Halophilic archaea belong to the phylum Euryarchaeota, are chemoorganotrophic and thrive in a wide array of environments such as the Dead Sea [ 10 , 11 ], solar salterns [ 12 , 13 , 14 ], and have been isolated frequently from subterranean salt cores [ 15 , 16 , 17 ]. Halophilic archaea have also been isolated from permanently cold evaporation ponds found in the dry regions of Antarctica e.g., Deep Lake [ 18 , 19 ].…”

Section: Characteristics and Environments Of Halophilic Archaeamentioning

confidence: 99%

On the Response of Halophilic Archaea to Space Conditions

Leuko

Rettberg

Pontifex

et al. 2014

Life

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Microorganisms are ubiquitous and can be found in almost every habitat and ecological niche on Earth. They thrive and survive in a broad spectrum of environments and adapt to rapidly changing external conditions. It is of great interest to investigate how microbes adapt to different extreme environments and with modern human space travel, we added a new extreme environment: outer space. Within the last 50 years, technology has provided tools for transporting microbial life beyond Earth’s protective shield in order to study in situ responses to selected conditions of space. This review will focus on halophilic archaea, as, due to their ability to survive in extremes, they are often considered a model group of organisms to study responses to the harsh conditions associated with space. We discuss ground-based simulations, as well as space experiments, utilizing archaea, examining responses and/or resistance to the effects of microgravity and UV in particular. Several halophilic archaea (e.g., Halorubrum chaoviator) have been exposed to simulated and actual space conditions and their survival has been determined as well as the protective effects of halite shown. Finally, the intriguing potential of archaea to survive on other planets or embedded in a meteorite is postulated.

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

Cited by 37 publications

References 40 publications

Comparison of bacterial diversity from solar salterns and a simulated laboratory study

Comparison of bacterial diversity from solar salterns and a simulated laboratory study

Phylogenetic appraisal of antagonistic, slow growing actinomycetes isolated from hypersaline inland solar salterns at Sambhar salt Lake, India

On the Response of Halophilic Archaea to Space Conditions

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