Bacterial Diversity and Communities Structural Dynamics in Soil and Meltwater Runoff at the Frontier of Baishui Glacier No.1, China

Sajjad, Wasim; Ali, Barkat; Bahadur, Ali; Ghimire, Prakriti Sharma; Kang, Shichang

doi:10.1007/s00248-020-01600-y

Cited by 18 publications

(26 citation statements)

References 81 publications

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“…For example, Proteobacteria (43%) and Actinobacteria (16%) were the predominant bacteria phyla in soils from Hailuogou Glacier retreat region. Similarly, they were also reported on the Muztag Ata Glacier chronosequence (Khan et al, 2020) and the frontier of Baishui Glacier No.1 (Sajjad et al, 2021). In this research, the Proteobacteria average relative abundance was 21.95% in total and comparable to the data from Gupta's report (Gupta et al, 2020).…”

Section: A Special Prokaryote Community Structure Has Been Found In the High-elevation Glacier Chronosequencessupporting

confidence: 87%

“…in Gupta's report. The glaciers in other reports cited above were all below 4,400 m (Sun et al, 2016;Khan et al, 2020;Sajjad et al, 2021). These results suggested that as the elevation increased, the abundance of Proteobacteria decreased; at the same time, other phyla were enriched.…”

Section: A Special Prokaryote Community Structure Has Been Found In the High-elevation Glacier Chronosequencesmentioning

confidence: 49%

“…For the last years, several studies have been focused on the melt glacier foreland bulk soil community, such as an autotrophic community in Zhadang Glacier (30 • 28.540 N, 90 • 38.362 E, 5,200 m at glacier termini) (Liu et al, 2016), a bacterial community in the foreland of Baishui Glacier No. 1 (27 • 06 16 N, 100 • 11 44 E, 4,395 m at glacier termini) (Sajjad et al, 2021), a bacterial and fungal community in Hailuogou Glacier (29 • 34 N, 102 • 00 E, 2,951 m at glacier termini) (Bai et al, 2019(Bai et al, , 2020Jiang et al, 2019;Li et al, 2020), and a bacterial community in Muztag Ata Glacier (38 • 16 N, 75 • 0 E, 4,350 m at glacier termini) (Khan et al, 2020). These studies were not enough as yet to understand prokaryotic community succession and the effect of plants on soil microorganism in this region.…”

Section: Introductionmentioning

confidence: 99%

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Prokaryotic Community Succession in Bulk and Rhizosphere Soils Along a High-Elevation Glacier Retreat Chronosequence on the Tibetan Plateau

et al. 2021

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Early colonization and succession of soil microbial communities are essential for soil development and nutrient accumulation. Herein we focused on the changes in pioneer prokaryotic communities in rhizosphere and bulk soils along the high-elevation glacier retreat chronosequence, the northern Himalayas, Tibetan Plateau. Rhizosphere soils showed substantially higher levels of total organic carbon, total nitrogen, ammonium, and nitrate than bulk soils. The dominant prokaryotes were Proteobacteria, Actinobacteria, Acidobacteria, Chloroflexi, Crenarchaeota, Bacteroidetes, and Planctomycetes, which totally accounted for more than 75% in relative abundance. The dominant genus Candidatus Nitrososphaera occurred at each stage of the microbial succession. The richness and evenness of soil prokaryotes displayed mild succession along chronosequene. Linear discriminant analysis effect size (LEfSe) analysis demonstrated that Proteobacteria (especially Alphaproteobacteria) and Actinobacteria were significantly enriched in rhizosphere soils compared with bulk soils. Actinobacteria, SHA_109, and Thermoleophilia; Betaproteobacteria and OP1.MSBL6; and Planctomycetia and Verrucomicrobia were separately enriched at each of the three sample sites. The compositions of prokaryotic communities were substantially changed with bulk and rhizosphere soils and sampling sites, indicating that the communities were dominantly driven by plants and habitat-specific effects in the deglaciated soils. Additionally, the distance to the glacier terminus also played a significant role in driving the change of prokaryotic communities in both bulk and rhizosphere soils. Soil C/N ratio exhibited a greater effect on prokaryotic communities in bulk soils than rhizosphere soils. These results indicate that plants, habitat, and glacier retreat chronosequence collectively control prokaryotic community composition and succession.

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Section: A Special Prokaryote Community Structure Has Been Found In the High-elevation Glacier Chronosequencessupporting

confidence: 87%

Section: A Special Prokaryote Community Structure Has Been Found In the High-elevation Glacier Chronosequencesmentioning

confidence: 49%

Section: Introductionmentioning

confidence: 99%

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Prokaryotic Community Succession in Bulk and Rhizosphere Soils Along a High-Elevation Glacier Retreat Chronosequence on the Tibetan Plateau

et al. 2021

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“…The bacterial richness observed in this study was somewhat similar to that observed in meltwater from the Southern Patagonian ice sheet. The overall trend of OTU increases from upstream to downstream, similar to the trend of bacterial diversity in glacial meltwater observed in Baishui Glacier (Sajjad et al 2021). In addition, the OTU of glacial soil was higher than that of glacial runoff.…”

Section: Physical and Chemical Properties Of Samplessupporting

confidence: 75%

“…Studies have shown that different habitats in the same glacier inhabit different microbial communities, and there are few common taxa (Sajjad et al 2021). Previous studies have reported significant differences in bacterial diversity between glacial soils and snow cover, as well as changes in microbial community diversity and composition in alpine glaciers caused by glacier retreat (Wilhelm et al 2013;Yang et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Environmental characteristics and changes of bacterial communities in the meltwater runoff of glacier in Ny-Alesund, Arctic

Lü

Wang

Han

et al. 2021

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The present study assessed the diversity and composition of bacterial communities in glacial runoff and glacial soils in the Midre Lovénbreen glacier region of Svalbard. A total of 6,593 operational taxonomic units were identified by high-throughput sequencing. The results showed differences in bacterial community composition between the upper and lower reaches of glacial runoff. The abundance of Actinobacteria, Firmicutes, Betaproteobacteria and Gammaproteobacteria in the upper reaches of glacial runoff was higher than that in the lower reaches. In contrast, the the abundance of Cyanobacteria and Alphaproteobacteria in the downstream of glacial runoff was higher than that in the upstream. In addition, we compared bacterial diversity and composition between glacial runoff areas and soils. The chart analysis showed that bacterial diversity in glacial soil was higher than that in the glacial runoff. Some typical bacteria in the soil, such as Actinobacteria, entered glacial runoff through contact between them. The abundance of Acidobacteria, Sphingobacterium and Flavobacterium was higher in glacial soil. Weighted correlation network analysis showed that the core bacteria in glacial runoff and glacial soil were typical bacteria in different habitats. Distance-based redundancy analysis revealed that NO 2 - -N was the most significant factor affecting the distribution of soil bacterial community, while NO 3 - -N was the most significant factor affecting the distribution of glacial runoff bacterial community.

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Isolation and characterization of a cold‐active, detergent‐stable protease from Serratia sp. TGS1

et al. 2023

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Psychrophiles are cold‐adapted microorganisms living in cold regions and are known to generate cold‐active enzymes such as proteases, lipases, and peptidases. These types of enzymes are a major part of the market of the food and textile sector. This study aimed to isolate and characterize the cold‐active and detergent‐stable, extracellular protease from psychotrophic bacteria Serratia sp. TGS1 (OQ654005). Protease was purified by gel permeation chromatography using Sephadex G‐75. The specific activity of the purified protease was 250 U/mg at 15°C, with a purification fold of 5.68 and a percentage yield of 60%. The cold active protease was stable within a temperature range of 5–30°C and a pH range of 6–10. Ca+2 and Mg+2 enhanced its activity while chelators like ethylenediaminetetraacetic acid inhibited cold active protease, showing it as metalloprotease in nature. The enzyme was sensitive to Cu+2, Zn+2, and Hg+2, and the proteolytic activity decreased upon treatment with heavy metals. The molecular weight of the protease was estimated to be 47 kDa using sodium dodecyl sulfate (SDS)‐polyacrylamide gel electrophoresis. Proteins within a specific range of molecular weight possess desirable properties for industrial enzyme use. By working on a specific range, the researchers intended to examine an enzyme to examine its specific characteristics. The purified protease showed high stability to detergents like SDS, Tween 20, Tween 60, and Triton X. The maximum velocity Vmax and Km values were 59.90 mg/min/mL and 1.53 mg/mL, respectively. The obtained protease exhibited an interesting activity at a broad range of pH (6–10) and stability at low temperatures (5–30°C) and detergents. Such enzymatic features of versatile and potent cold‐active enzymes enhance their industrial applications to meet food, dairy, and laundry requirements.

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Bacterial Diversity and Communities Structural Dynamics in Soil and Meltwater Runoff at the Frontier of Baishui Glacier No.1, China

Cited by 18 publications

References 81 publications

Prokaryotic Community Succession in Bulk and Rhizosphere Soils Along a High-Elevation Glacier Retreat Chronosequence on the Tibetan Plateau

Prokaryotic Community Succession in Bulk and Rhizosphere Soils Along a High-Elevation Glacier Retreat Chronosequence on the Tibetan Plateau

Environmental characteristics and changes of bacterial communities in the meltwater runoff of glacier in Ny-Alesund, Arctic

Isolation and characterization of a cold‐active, detergent‐stable protease from Serratia sp. TGS1

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