Diversity of sulfur-cycle prokaryotes in freshwater lake sediments investigated using aprA as the functional marker gene

Watanabe, Tomohiro; Kojima, Hisaya; Takano, Yoshinori; Fukui, Manabu

doi:10.1016/j.syapm.2013.04.009

Cited by 39 publications

(33 citation statements)

References 39 publications

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“…It is possible that these genes are related to uncharacterized sulfur-oxidizing prokaryotes. Similar sequences are found in other environmental samples including lake sediments [81,82] and in Blood Falls [8] but the organisms containing them have not been isolated or characterized. Below 8 cm, key genes involved in sulfate reduction were observed [52].…”

Section: (D) a Chemosynthetic Ecosystem Below Icementioning

confidence: 54%

Subglacial Lake Whillans microbial biogeochemistry: a synthesis of current knowledge

Mikucki

Lee

Ghosh

et al. 2016

Phil. Trans. R. Soc. A.

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Liquid water occurs below glaciers and ice sheets globally, enabling the existence of an array of aquatic microbial ecosystems. In Antarctica, large subglacial lakes are present beneath hundreds to thousands of metres of ice, and scientific interest in exploring these environments has escalated over the past decade. After years of planning, the first team of scientists and engineers cleanly accessed and retrieved pristine samples from a West Antarctic subglacial lake ecosystem in January 2013. This paper reviews the findings to date on Subglacial Lake Whillans and presents new supporting data on the carbon and energy metabolism of resident microbes. The analysis of water and sediments from the lake revealed a diverse microbial community composed of bacteria and archaea that are close relatives of species known to use reduced N, S or Fe and CH4 as energy sources. The water chemistry of Subglacial Lake Whillans was dominated by weathering products from silicate minerals with a minor influence from seawater. Contributions to water chemistry from microbial sulfide oxidation and carbonation reactions were supported by genomic data. Collectively, these results provide unequivocal evidence that subglacial environments in this region of West Antarctica host active microbial ecosystems that participate in subglacial biogeochemical cyclingauthorsversionPeer reviewe

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Section: (D) a Chemosynthetic Ecosystem Below Icementioning

confidence: 54%

Subglacial Lake Whillans microbial biogeochemistry: a synthesis of current knowledge

Mikucki

Lee

Ghosh

et al. 2016

Phil. Trans. R. Soc. A.

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“…Targeting the gene dsrA (dissimilatory sulfite reductase), diverse group of sulfate-reducing bacteria was detected in Antarctic habitats (Karr et al, 2005). Recently, Watanabe et al (2013) detected phylotypes, based on aprA (adenosine-5'-phosphosulfate reductase alpha subunit) belonging to the genera Thiocapsa, Sulfuricella, Desulfobacterium, Desulfofaba and Desulfotomaculum from Antarctic fresh water lakes. While more than 70% of sulfur transformation in subglacial lake sediments was contributed by two genera Sideroxydans and Thiobacillus (Purcell et al, 2014).…”

Section: Diversity Of Antarctica As Studied By Using Functional Genesmentioning

confidence: 99%

Bacterial Biodiversity, Cold Adaption and Biotechnological Importance of Bacteria Occurring in Antarctica

Shivaji

2017

Proceedings of the Indian National Science Academy

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Antarctica is the coldest, iciest, windiest and driest continent and defines the limits of temperature at which life forms can survive and divide. These cold loving microorganisms are known as psychrophiles and are present in all the unique habitats of Antarctica including permafrost and ice. Their distribution and abundance varies from habitat to habitat and several new genera and species have been discovered in the icy continent. They have several strategies by which they survive and divide at low temperature such as the ability to catalyze reactions and continue metabolism with cold-tolerant enzymes; ability to maintain optimum membrane fluidity at low temperature; occurrence of specific genes required for survival at low temperatures; presence of antifreeze-activity etc.. Enzymes from psychrophilic bacteria have been found to be useful for several purposes ranging from recombinant DNA technology to food processing. The ability of cold-tolerant organisms to degrade petroleum products and other environmental pollutants highlight them as potential candidates for bioremediation in extreme cold environments. The recently reported genome sequences of a number of novel cold-tolerant isolates are likely to provide some more insights into the mechanism of bacterial cryotolerance.

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“…The water depth and the ice thickness at this site were 20.2 and 1.5 m, respectively (cf. surface sediment description; Watanabe et al 2013). We also collected lake sediments from L. Maruwan-minami (hereafter, sample Ms5S) as a reference site (see Additional file 1).…”

Section: Geological Setting Of the Sampling Sitesmentioning

confidence: 99%

“…The concentration of bulk sulfur was also significant in the freshwater sedimentary stage (Figure 4). Using a functional gene marker, Watanabe et al (2013) pointed out the importance of sulfur cycling and microbial interactions in freshwater environments, including in the modern sediments of L. Maruwan. With respect to the input from physical weathering, clay-sized particles of aluminosilicate minerals are generated by subglacial abrasion processes.…”

Section: Primary Producers and Estimates Of Biogenic Silicamentioning

confidence: 99%

Biogeochemistry and limnology in Antarctic subglacial weathering: molecular evidence of the linkage between subglacial silica input and primary producers in a perennially ice-covered lake

Takano

Kojima

Takeda

et al. 2015

Prog. in Earth and Planet. Sci.

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We report a 6,000 years record of subglacial weathering and biogeochemical processes in two perennially ice-covered glacial lakes at Rundvågshetta, on the Soya Coast of Lützow-Holm Bay, East Antarctica. The two lakes, Lake Maruwan Oike and Lake Maruwan-minami, are located in a channel that drains subglacial water from the base of the East Antarctic ice sheet. Greenish-grayish organic-rich laminations in sediment cores from the lakes indicate continuous primary production affected by the inflow of subglacial meltwater containing relict carbon, nitrogen, sulfur, and other essential nutrients. Biogenic silica, amorphous hydrated silica, and DNA-based molecular signatures of sedimentary facies indicate that diatom assemblages are the dominant primary producers, supported by the input of inorganic silicon (Si) from the subglacial inflow. This study highlights the significance of subglacial water-rock interactions during physical and chemical weathering processes and the importance of such interactions for the supply of bioavailable nutrients.

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Diversity of sulfur-cycle prokaryotes in freshwater lake sediments investigated using aprA as the functional marker gene

Cited by 39 publications

References 39 publications

Subglacial Lake Whillans microbial biogeochemistry: a synthesis of current knowledge

Subglacial Lake Whillans microbial biogeochemistry: a synthesis of current knowledge

Bacterial Biodiversity, Cold Adaption and Biotechnological Importance of Bacteria Occurring in Antarctica

Biogeochemistry and limnology in Antarctic subglacial weathering: molecular evidence of the linkage between subglacial silica input and primary producers in a perennially ice-covered lake

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