The Archaeal Diversity and Population in a Drained Alkaline Saline Soil of the Former Lake Texcoco (Mexico)

Valenzuela‐Encinas, César; Alcántara-Hernández, Rocı́o; Estrada‐Alvarado, María Isabel; Serna, Francisco Javier Zavala-Díaz de la; Dendooven, Luc; Marsch, Rodolfo

doi:10.1080/01490451.2010.520075

Cited by 14 publications

(12 citation statements)

References 31 publications

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“…Approximately 10 % of sequences in the present dataset belonged to the phylum Actinobacteria and it has previously been noted that many of the halophilic bacteria isolated from saline soils belong to this phylum (Sardinha et al 2003;Valenzuela-Encinas et al 2012). In one study, however, it was found that although Actinobacteria was represented in both medium and low saline soils, it was absent in extremely high saline soils (Valenzuela-Encinas et al 2009).…”

Section: Bacteriamentioning

confidence: 59%

A meta-analysis of the publicly available bacterial and archaeal sequence diversity in saline soils

Gong

2013

World J Microbiol Biotechnol

100

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An integrated view of bacterial and archaeal diversity in saline soil habitats is essential for understanding the biological and ecological processes and exploiting potential of microbial resources from such environments. This study examined the collective bacterial and archaeal diversity in saline soils using a meta-analysis approach. All available 16S rDNA sequences recovered from saline soils were retrieved from publicly available databases and subjected to phylogenetic and statistical analyses. A total of 9,043 bacterial and 1,039 archaeal sequences, each longer than 250 bp, were examined. The bacterial sequences were assigned into 5,784 operational taxonomic units (OTUs, based on C97 % sequence identity), representing 24 known bacterial phyla, with Proteobacteria (44.9 %), Actinobacteria (12.3 %), Firmicutes (10.4 %), Acidobacteria (9.0 %), Bacteroidetes (6.8 %), and Chloroflexi (5.9 %) being predominant. Lysobacter (12.8 %) was the dominant bacterial genus in saline soils, followed by Sphingomonas (4.5 %), Halomonas (2.5 %), and Gemmatimonas (2.5 %). Archaeal sequences were assigned to 602 OTUs, primarily from the phyla Euryarchaeota (88.7 %) and Crenarchaeota (11.3 %).Halorubrum and Thermofilum were the dominant archaeal genera in saline soils. Rarefaction analysis indicated that less than 25 % of bacterial diversity, and approximately 50 % of archaeal diversity, in saline soil habitats has been sampled. This analysis of the global bacterial and archaeal diversity in saline soil habitats can guide future studies to further examine the microbial diversity of saline soils.

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Section: Bacteriamentioning

confidence: 59%

A meta-analysis of the publicly available bacterial and archaeal sequence diversity in saline soils

Gong

2013

World J Microbiol Biotechnol

100

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“…Over the last two decades, numerous studies about halophilic and halotolerant bacteria have been conducted in different saline environments such as desert playa lakes Yang et al 2012), high altitude saline lakes (Jiang et al 2009;Liu et al 2013), and saline or soda lakes (Costa et al 2008;Jones et al 1998;Oren 2008;Valenzuela-Encinas et al 2012). Measurements of microbial biodiversity in hypersaline environments require much effort due to the difficulties in culturing this microorganisms (Weimer et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Archaeal Microbial Diversity of Hypersaline Lake Acıgöl, Denizli, Turkey

Budakoǧlu¹,

Kurt

Karaman

et al. 2014

Geomicrobiology Journal

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Archaeal diversity in Lake Acıg€ ol, a closed-basin, alkaline, hypersaline lake located at the northern edge of western Tourides in southwest Anatolia, was investigated using culture-independent methods. Microbial mat samples were collected from six different points. Archaeal 16S rRNA gene libraries were generated using domain specific oligonucleotide primers, and 16S rRNA gene sequences of clone libraries were analyzed phylogenetically. Denaturing gradient gel electrophoresis of 16S rRNA genes showed a variance in diversity with spatial differences. Archaeal diversity of Acıg€ ol is dominated by the members of family Halobacteriaceae which requires both high salt concentration and high pH for growth. Sequence analysis of archaeal 16s rRNA genes indicates the presence of the phylotypes affiliated with the genera Halorubrum, Halosimplex, Halorhabdus, Haloterrigena and Natronococcus in the analyzed samples.

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“…Different experimental approaches have been applied to better understand the effect of flooding on the microbial community. Valenzuela-Encinas et al (2008, 2012) first studied the archaeal communities using cloned sequences of the 16S rRNA gene in a pristine and drained soil. They also analyzed the bacterial communities in soil of the former lake Texcoco with different EC and pH following different periods of irrigation and drainage (Valenzuela-Encinas et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Reducing Salinity by Flooding an Extremely Alkaline and Saline Soil Changes the Bacterial Community but Its Effect on the Archaeal Community Is Limited

et al. 2017

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Regular flooding of the soil to reduce salinity will change soil characteristics, but also the microbial community structure. Soil of the former lake Texcoco with electrolytic conductivity (EC) 157.4 dS m-1 and pH 10.3 was flooded monthly in the laboratory under controlled conditions for 10 months while soil characteristics were determined and the archaeal and bacterial community structure monitored by means of 454 pyrosequencing of the 16S rRNA gene. The EC of the soil dropped from 157.8 to 1.7 dS m-1 and the clay content decreased from 430 to 270 g kg-1 after ten floodings, but the pH (10.3) did not change significantly over time. Flooding the soil had a limited effect on the archaeal community structure and only the relative abundance of Haloferax-like 16S rRNA phylotypes changed significantly. Differences in archaeal population structure were more defined by the initial physicochemical properties of the soil sample than by a reduction in salinity. Flooding, however, had a stronger effect on bacterial community structure than on the archaeal community structure. A wide range of bacterial taxa was affected significantly by changes in the soil characteristics, i.e., four phyla, nine classes, 17 orders, and 28 families. The most marked change occurred after only one flooding characterized by a sharp decrease in the relative abundance of bacterial groups belonging to the Gammaproteobacteria, e.g., Halomonadaceae (Oceanospirillales), Pseudomonadaceae, and Xanthomonadaceae and an increase in that of the [Rhodothermales] (Bacteroidetes), Nitriliruptorales (Actinobacteria), and unassigned Bacteria. It was found that flooding the soil sharply reduced the EC, but also the soil clay content. Flooding the soil had a limited effect on the archaeal community structure, but altered the bacterial community structure significantly.

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The Archaeal Diversity and Population in a Drained Alkaline Saline Soil of the Former Lake Texcoco (Mexico)

Cited by 14 publications

References 31 publications

A meta-analysis of the publicly available bacterial and archaeal sequence diversity in saline soils

A meta-analysis of the publicly available bacterial and archaeal sequence diversity in saline soils

Archaeal Microbial Diversity of Hypersaline Lake Acıgöl, Denizli, Turkey

Reducing Salinity by Flooding an Extremely Alkaline and Saline Soil Changes the Bacterial Community but Its Effect on the Archaeal Community Is Limited

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