Anoxybacillus geothermalis sp. nov., a facultatively anaerobic, endospore-forming bacterium isolated from mineral deposits in a geothermal station

Filippidou, Sevasti; Jaussi, Marion; Junier, Thomas; Wunderlin, Tina; Jeanneret, Nicole; Palmieri, Fabio; Palmieri, Ilona; Roussel-Delif, Ludovic; Vieth‐Hillebrand, Andrea; Vetter, Alexandra; Chain, Patrick; Regenspurg, Simona; Junier, Pilar

doi:10.1099/ijsem.0.001125

Cited by 25 publications

(12 citation statements)

References 53 publications

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“…The isolation from different locations of Turkey resulted in identification of A. pallidus as amylase producer 12 . With optimum growth conditions between 40-65°C, 0-3% (w/v) NaCl and 5.0-9.5 pH A. geothermalis could hydrolyze casein and starch due to protease and amylase activity, respectively 19 while A. geothermalis in this study could also able to produce lipase and xylanase. Namsaraev 37 determined A. mongoliensis, whose optimum growth was at 35-75°C, 0-5% (w/v) NaCl concentration and 5.5-10.8 pH, as a thermophilic protease and amylase producer due to the hydrolysis of starch, casein and gelatin.…”

Section: Enzyme Production Capacities Of Thermophilesmentioning

confidence: 69%

Presence of Different Bacterial Species in Thermal Sources and Novelty in Their Industrial Enzyme Productions

Albayrak¹,

Genç²,

Özkan³

et al. 2019

J Pure Appl Microbiol

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In this study, one hundred and thirty isolates were isolated from water and sludge samples taken from hot springs located in different regions of Turkey. Among them, eleven isolates were chosen according to conventional (morphological, physiological and biochemical tests) and molecular methods (rep-PCR and 16S rRNA sequencing). These bacteria were then tested for their capability to produce valuable enzymes. As a result; species belonging to Bacillus, Anoxybacillus, Aeribacillus, Enterococcus, Exiguobacterium and Paenibacillus were identified. Test strains were found to have optimum reproductive potential at pH 5.0-9.0 and 15-65°C, usually at a concentration of 1.0-10.0% (w/v) NaCl. In addition, all thermotolerant bacteria were Gram, endospore (except E. profundum), catalase and oxidase (except E. faecium and E. profundum) positive, and rod-shaped (except E. faecium). It was observed that all isolates had a 99% similarity percentage as a result of 16S rRNA sequence analysis. All of the isolates were capable of producing industrially important enzymes moreover, eight of them could produce at least two of these enzymes. Test strains had high potential of industrial enzyme production, and the enzymes from these thermo-tolerant isolates will be widely used in biotechnological processes.

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Section: Enzyme Production Capacities Of Thermophilesmentioning

confidence: 69%

Presence of Different Bacterial Species in Thermal Sources and Novelty in Their Industrial Enzyme Productions

Albayrak¹,

Genç²,

Özkan³

et al. 2019

J Pure Appl Microbiol

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“…4A). In 2018, a much larger number of bacterial OTUs was enriched (46) or depleted (23) by residue retention (Fig. 4B).…”

Section: Bacterial and Fungal Community Compositionmentioning

confidence: 97%

“…At the OTU level, OTUs belonging to Bradyrhizobium and Candidatus Solibacter were observed to be enriched in the DT treatment in 2018, and they have been reported to be able to fix atmospheric nitrogen or reduce nitrite [45]. The genus Anoxybacillus, usually found in anaerobic or facultative anaerobic conditions [46,47], was observed to be enriched in the NT treatment, indicating that there were anaerobic or facultative anaerobic conditions in no-tilled soils.…”

Section: Effects Of Tillage Practices On the Soil Bacterial And Fungamentioning

confidence: 99%

Tillage practices and residue management manipulate soil bacterial and fungal assembly and co-occurrence network patterns in maize agroecosystem

Yang

Guan

Zhai

et al. 2020

Preprint

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Background: Tillage practices and residue management are highly important agricultural practices. However, very few studies have examined the influence of tillage practices and residue management on both bacterial and fungal communities and network patterns in consecutive years. Results: We examined the effects of different tillage practices, including no tillage, rotary tillage, and deep tillage, on the soil bacterial and fungal communities and co-occurrence networks following residue removal and residue retention in 2017 and 2018. This study showed that both bacterial and fungal communities were unaffected by tillage practices in 2017, but they were significantly influenced in 2018. In addition, soil fungal operational taxonomic unit (OTU) richness was significantly enhanced by deep tillage compared with no tillage in 2018, while bacterial OTU richness was unaffected in either year. Tillage practices had differing effects on the soil microbial network patterns, with rotary and deep tillage increasing the complexity of bacterial networks but simplifying fungal networks. However, residue retention only induced a shift in the fungal community in 2018 without an obvious effect in the bacterial community in both years. In addition, residue retention simplified soil bacterial and fungal networks in 2018. Conclusions: This study highlighted the dissimilar responses of bacterial and fungal networks to tillage practices and emphasized that tillage practice is more important than residue management in shaping soil microbial communities.

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“…The bacteria were either alkalophilic or alkalophobic, and the DNA G+C content ranged from 42% to 57% [37]. Filippidou et al [38] isolated a strain of Anoxybacillus from deposits clogging ground surface filters at geothermal power plants in a field of enhanced geothermal systems in the Groß Schönebeck region of northern Germany, which formed endospores that are thermophilic, Gram-positive, facultatively anaerobic, and positive for catalase and oxidase reactions. Additionally, Dai et al [39] isolated a thermophilic and ethanol-resistant strain of Anoxybacillus from deposit samples collected from groundwater wells at a hot spring in Yunnan Province in China.…”

Section: Identified Bacteriamentioning

confidence: 99%

Effects of a Groundwater Heat Pump on Thermophilic Bacteria Activity

Kim

Lee

2019

Water

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Groundwater samples were collected from the tubular wells of a groundwater heat pump (GWHP), and the psychrophilic, mesophilic, and thermophilic bacteria inhabiting the collected groundwater were cultured and isolated. Using the isolated bacteria, we analyzed temperature-dependent changes in autochthonous bacteria based on the operation of the GWHP. Microbial culture identified eight species of bacteria: five species of thermophilic bacteria (Anoxybacillus tepidamans, Bacillus oceanisediminis, Deinococcus geothermalis, Effusibacillus pohliae, and Vulcaniibacterium thermophilum), one species of mesophilic bacteria (Lysobacter mobilis), and two species of psychrophilic bacteria (Paenibacillus elgii and Paenibacillus lautus). The results indicated A. tepidamans as the most dominant thermophilic bacterium in the study area. Notably, the Anoxybacillus genus was previous reported as a microorganism capable of creating deposits that clog above-ground wells and filters at geothermal power plants. Additionally, we found that on-site operation of the GWHP had a greater influence on the activity of thermophilic bacteria than on psychrophilic bacteria among autochthonous bacteria. These findings suggested that study of cultures of thermophilic bacteria might contribute to understanding the bio-clogging phenomena mediated by A. tepidamans in regard to GWHP-related thermal efficiency.

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Anoxybacillus geothermalis sp. nov., a facultatively anaerobic, endospore-forming bacterium isolated from mineral deposits in a geothermal station

Cited by 25 publications

References 53 publications

Presence of Different Bacterial Species in Thermal Sources and Novelty in Their Industrial Enzyme Productions

Presence of Different Bacterial Species in Thermal Sources and Novelty in Their Industrial Enzyme Productions

Tillage practices and residue management manipulate soil bacterial and fungal assembly and co-occurrence network patterns in maize agroecosystem

Effects of a Groundwater Heat Pump on Thermophilic Bacteria Activity

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