Taxonomic and ecological characterization of cyanobacteria from some brackish and saline lakes of Southern Transbaikal Region

Tsyrenova, D. D.; Bryanskaya, A. V.; Намсараев, З. Б.; Акимов, В. Н.

doi:10.1134/s0026261711020160

Cited by 10 publications

(4 citation statements)

References 4 publications

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“…Higher salinity was unfavorable for the development of the heterocystous cyanobacteria but akinetes of N. spumigena were found at the salinity up to 210 g/l (Cr-14). The heterocystous cyanobacteria are rarely detected at the salinities higher than 70-100 g/l in NaCl-dominated lakes with neutral pH (Oren 2011(Oren , 2015 and higher than 30-40 (90) g/l in soda lakes (Krienitz and Schagerl 2016;Tsyrenova et al 2011;Voronikhin 1929Voronikhin , 1934. The representatives of the genus Nodularia are able to grow up to 100 g/l NaCl in culture that is probably the upper range of salinity for heterocystous cyanobacteria from soda lakes (Tsyrenova et al 2011).…”

Section: Diversity Of Phototrophic Microorganismsmentioning

confidence: 99%

“…Shallow soda lakes of south Siberia are located in cryo-arid continental climate and subjected to high amplitude of the hydro-chemical fluctuations which cause significant successional changes of microbial communities. Although heterocystous cyanobacteria were described there at salinities up to 90 g/l (Burganskaya et al 2018;Tsyrenova et al 2011;Voronikhin 1929Voronikhin , 1932Voronikhin , 1934 they are considered to persist in phototrophic crusts with an ability to proliferate during wet periods as well as during short-term rains of the dry periods (Namsaraev et al 2018a,b).…”

Section: Introductionmentioning

confidence: 99%

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The patterns of nitrogen fixation in haloalkaliphilic phototrophic communities of Kulunda Steppe soda lakes (Altai, Russia)

Samylina

Намсараев

Grouzdev

et al. 2019

FEMS Microbiology Ecology

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Nitrogen fixation (NF) of phototrophic communities was studied in a number of soda lakes with a wide range of salinity (25–400 g/l) located in Kulunda Steppe (Altai, Russia) during several summer seasons (2011–2016). The phototrophic communities were represented by the algal-bacterial Ctenocladus communities or cyanobacterial biofilms dominated by heterocystous and non-heterocystous cyanobacteria and purple sulfur bacteria Ectothiorhodospira sp. (up to 210 g/l) and endoevaporitic Euhalothece communities dominated by the extremely salt-tolerant unicellular cyanobacterium Euhalothece sp. and Ectothiorhodospira sp. (above 350 g/l). Salinity was the major factor influencing the composition and NF potential of the phototrophic communities. The communities dominated by vegetative heterocystous cyanobacteria exhibited light-independent NF at total salinity up to 60 g/l. The communities dominated by non-heterocystous cyanobacteria exhibited light-dependent NF in a range of 55–100 g/l, but it was significantly suppressed at 100 g/l. At 160–200 g/l the dark heterotrophic NF was a prevailing process if communities didn't contain Euhalothece sp. At salt-saturating ranges above 350 g/l, light-dependent NF associated with the Euhalothece communities was detected. A statistically significant positive correlation between the NF and diurnal light intensity was found in all samples of communities dominated by non-heterocystous cyanobacteria in contrast to communities dominated by heterocystous cyanobacteria with insignificant correlation coefficients.

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Section: Diversity Of Phototrophic Microorganismsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The patterns of nitrogen fixation in haloalkaliphilic phototrophic communities of Kulunda Steppe soda lakes (Altai, Russia)

Samylina

Намсараев

Grouzdev

et al. 2019

FEMS Microbiology Ecology

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“…Moderately haloalkaliphilic heterocystous cyanobacteria capable of fixing nitrogen under aerobic light conditions are abundant in soda lakes at salt concentrations below 70 g/L. Various species of Anabaenopsis, Cyanospira, and Nodularia are abundant in the plankton of the moderately saline soda lakes of the East African Rift and South Siberia (Krienitz and Schagerl 2016;Tsyrenova et al 2011), while a dominance of heterocystous cyanobacteria (primarily Anabaenopsis spp.) in shallow soda lakes of the Kulunda Steppe (Southern Siberia, Russia) was noted as early as in the 1920s-1930s at salinities up to 50 g/L (Voronikhin 1929;Isachenko 1934).…”

Section: Introductionmentioning

confidence: 99%

Effect of salinity on diazotrophic activity and microbial composition of phototrophic communities from Bitter-1 soda lake (Kulunda Steppe, Russia)

Намсараев

Samylina²,

Сухачева

et al. 2018

Extremophiles

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Bitter-1 is a shallow hypersaline soda lake in Kulunda Steppe (Altai region, Russia). During a study period between 2005 and 2016, the salinity in the littoral area of the lake fluctuated within the range from 85 to 400 g/L (in July of each year). Light-dependent nitrogen fixation occurred in this lake up to the salt-saturating conditions. The rates increased with a decrease in salinity, both under environmental conditions and in laboratory simulations. The salinities below 100 g/L were favorable for light-dependent nitrogen fixation, while the process was dramatically inhibited above 200 g/L salts. The analysis of nifH genes in environmental samples and in enrichment cultures of diazotrophic phototrophs suggested that anaerobic fermenting and sulfate-reducing bacteria could participate in the dark nitrogen fixation process up to soda-saturating conditions. However, we cannot exclude the possibility that haloalkaliphilic nonheterocystous cyanobacteria (Euhalothece sp. and Geitlerinema sp.) and anoxygenic purple sulfur bacteria (Ectothiorhodospira sp.) might also play a role in the process at light conditions. The heterocystous cyanobacterium Nodularia sp. develops at low salinity (below 80 g/L) that is not characteristic for Bitter-1 Lake and thus does not make a significant contribution to the nitrogen fixation in this lake.

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“…A number of heterocytous and nonheterocytous genera have been reported from saline and alkaline lakes (Jones and Grant 1999, L opez-Archilla et al 2004, Foti et al 2008, Tsyrenova et al 2011, Dadheech et al 2012. The isolation and characterization of these strains can generate interesting data about cyanobacterial distribution and behavior.…”

mentioning

confidence: 99%

Nonheterocytous cyanobacteria from Brazilian saline‐alkaline lakes

Andreote

Vaz

Genuário

et al. 2014

Journal of Phycology

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Saline-alkaline lakes are extreme environments that limit the establishment and development of life. The Nhecolândia, a subregion of the Pantanal wetland in Brazil, is characterized by the existence of ~500 saline-alkaline lakes, which support an underexplored and rich diversity of microorganisms. In this study, unicellular and homocytous cyanobacteria from five saline-alkaline lakes were accessed by culture-dependent approaches. Morphological evaluation and analyses of near complete sequences (~1400 nt) of the 16S rRNA genes were applied for phylogenetic and taxonomic placement. This polyphasic approach allowed for the determination of the taxonomic position of the isolated strains into the following genera: Cyanobacterium, Geminocystis, Phormidium, Leptolyngbya, Limnothrix, and Nodosilinea. In addition, fourteen Pseudanabaenales and Oscillatoriales representatives of putative novel taxa were found. These sequences fell into five new clades that could correspond to new generic units of the Pseudanabaenaceae and Phormidiaceae families.

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Taxonomic and ecological characterization of cyanobacteria from some brackish and saline lakes of Southern Transbaikal Region

Cited by 10 publications

References 4 publications

The patterns of nitrogen fixation in haloalkaliphilic phototrophic communities of Kulunda Steppe soda lakes (Altai, Russia)

The patterns of nitrogen fixation in haloalkaliphilic phototrophic communities of Kulunda Steppe soda lakes (Altai, Russia)

Effect of salinity on diazotrophic activity and microbial composition of phototrophic communities from Bitter-1 soda lake (Kulunda Steppe, Russia)

Nonheterocytous cyanobacteria from Brazilian saline‐alkaline lakes

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