Mesorhizobium denitrificans sp. nov., a novel denitrifying bacterium isolated from sludge

Ṣiddiqi, Muḥammad Zubair; Thao, Ngo Thi Phuong; Choi, Gyu-Min; Kim, Dae‐Cheol; Lee, Young-Woo; Kim, Sang Young; Wee, Ji-Hyang; Im, Wan‐Taek

doi:10.1007/s12275-019-8590-0

Cited by 15 publications

(9 citation statements)

References 17 publications

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“…They also had a positive correlation with each other. Their capacity for N 2 O reduction has been demonstrated in past research [49][50][51]53,54 . Bradyrhizobium can degrade various hydrocarbons such as chloroalkanes, chloroalkenes, and benzonate 74 , and Mesorhizobium is a known TPH-degrader 75 .…”

Section: Correlation Analysis Between Key Parametersmentioning

confidence: 96%

“…Figure 6 shows the dynamics of 12 genera involved in N 2 O reduction during the rhizoremediation of diesel-contaminated soil. Bacterial species belonging to Bradyrhizobium, Aminobacter, Mesorhizobium, Shinella, Paracoccus, Azospirillum, Alcaligenes, Castellaniella, and Pseudomonas have been reported to reduce N 2 O [49][50][51][52][53][54][55][56][57][58][59][60][61] . Some also contain nosZ genes, which are responsible for the reduction of N 2 O to N 2 52,54,57,59,[62][63][64][65] .…”

Section: Sampling Time (D)mentioning

confidence: 99%

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Inoculation effect of Pseudomonas sp. TF716 on N2O emissions during rhizoremediation of diesel-contaminated soil

Kim

Cho

2022

Sci Rep

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The demand for rhizoremediation technology that can minimize greenhouse gas emissions while effectively removing pollutants in order to mitigate climate change has increased. The inoculation effect of N2O-reducing Pseudomonas sp. TF716 on N2O emissions and on remediation performance during the rhizoremediation of diesel-contaminated soil planted with tall fescue (Festuca arundinacea) or maize (Zea mays) was investigated. Pseudomonas sp. TF716 was isolated from the rhizosphere soil of tall fescue. The maximum N2O reduction rate of TF716 was 18.9 mmol N2O g dry cells−1 h−1, which is superior to the rates for previously reported Pseudomonas spp. When Pseudomonas sp. TF716 was added to diesel-contaminated soil planted with tall fescue, the soil N2O-reduction potential was 2.88 times higher than that of soil with no inoculation during the initial period (0–19 d), and 1.08–1.13 times higher thereafter. However, there was no enhancement in the N2O-reduction potential for the soil planted with maize following inoculation with strain TF716. In addition, TF716 inoculation did not significantly affect diesel degradation during rhizoremediation, suggesting that the activity of those microorganisms involved in diesel degradation was unaffected by TF716 treatment. Analysis of the dynamics of the bacterial genera associated with N2O reduction showed that Pseudomonas had the highest relative abundance during the rhizoremediation of diesel-contaminated soil planted with tall fescue and treated with strain TF716. Overall, these results suggest that N2O emissions during the rhizoremediation of diesel-contaminated soil using tall fescue can be reduced with the addition of Pseudomonas sp. TF716.

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Section: Correlation Analysis Between Key Parametersmentioning

confidence: 96%

Section: Sampling Time (D)mentioning

confidence: 99%

Inoculation effect of Pseudomonas sp. TF716 on N2O emissions during rhizoremediation of diesel-contaminated soil

Kim

Cho

2022

Sci Rep

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“…The species that comprise this genus are generally characterized by the presence of quinone-10 (Q-10), and summed feature 8 (C 18 : 1 ω7c and/or C 18 : 1 ω6c) as their predominant respiratory quinone and major fatty acid, respectively, and a DNA G+C content of 56.6 mol% (M. wenxiniae ca181) to 66.4 mol% (M. ephedrae 6GN30 T ) [10,11]. These strains have been mainly isolated from legume root nodules [9,12], but also from sludge [8], forest soil [13] and deep-sea sediment [14]. Here, we isolated strain NIBR3 T from a Microcystis aeruginosa cyanobacterial bloom culture.…”

Section: Introductionmentioning

confidence: 99%

“…ephedrae 6GN30 T ) [10, 11]. These strains have been mainly isolated from legume root nodules [9, 12], but also from sludge [8], forest soil [13] and deep-sea sediment [14]. Here, we isolated strain NIBR3 T from a Microcystis aeruginosa cyanobacterial bloom culture.…”

Section: Introductionmentioning

confidence: 99%

“…The members of the genus Mesorhizobium belong to the family Phyllobacteriaceae and are Gram-negative, aerobic, non-spore-forming and rod-shaped bacteria [6,7]. Moreover, the genome sizes of Mesorhizobium species vary from 4.3 Mbp (M. denitrificans LA-28 T ) to 8.6 Mbp (M. carmichaelinearum ICMP 18942 T ), and 46 genome sequences have been deposited in the NCBI (National Center for Biotechnology Information) [8,9]. The species that comprise this genus are generally characterized by the presence of quinone-10 (Q-10), and summed feature 8 (C 18 : 1 ω7c and/or C 18 : 1 ω6c) as their predominant respiratory quinone and major fatty acid, respectively, and a DNA G+C content of 56.6 mol% (M. wenxiniae ca181) to 66.4 mol% (M. ephedrae 6GN30 T ) [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Aquibium microcysteis gen. nov., sp. nov., isolated from a Microcystis aeruginosa culture and reclassification of Mesorhizobium carbonis as Aquibium carbonis comb. nov. and Mesorhizobium oceanicum as Aquibium oceanicum comb. nov

Kim

Park³

2022

International Journal of Systematic and Evolutionary Microbiology

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A novel bacterial strain, NIBR3T, was isolated from a Microcystis aeruginosa culture. Strain NIBR3T was characterized as Gram-negative, rod-shaped, catalase- and oxidase-positive, and aerobic. The 16S rRNA gene sequence analysis showed that strain NIBR3T was most closely related to Mesorhizobium carbonis B2.3T (=KCTC 52461), Mesorhizobium oceanicum B7T (=KCTC 42783) and Mesorhizobium qingshengii CCBAU 33460T (=HAMBI 3277), at 98.7, 97.2 and 97.2% similarity, respectively. Our phylogenetic analyses revealed that three strains [strain NIBR3T with the previously reported two Mesorhizobium species ( M. carbonis B2.3T and M. oceanicum B7T)] formed a distinct cluster from other Mesorhizobium type strains. The average nucleotide identity of strain NIBR3T relative to M. carbonis B2.3T , M. oceanicum B7T, and M. qingshengii CCBAU 33460T was found to be 84.3, 79.4 and 75.8 %, with average amino-acid identities of 85.1, 74.8 and 64.3 %, and digital DNA–DNA hybridization values of 27.6, 22.6 and 20.7 %, respectively. The genome size and genomic DNA G+C content of NIBR3T were 6.1 Mbp and 67.9 mol%, respectively. Growth of strain NIBR3T was observed at 23–45 °C (optimum, 33 °C), at pH 6–11 (optimum, 8) and in the presence of 0–4 % (w/v) NaCl (optimum, 0 %). The major polar lipids in this novel strain were phosphatidylethanolamine, phosphatidylcholine and phosphatidylmethylethanolamine. The predominant respiratory quinone was Q-10. Summed feature 8 (C18 : 1 ω7c and/or C18 : 1 ω6c) was the most abundant cellular fatty acid in strain NIBR3T. Based on genotypic characteristics using our genomic data, strain NIBR3T was identified as a member of new genus, Aquibium gen. nov., with the two aforementioned stains. The type strain f the novel species, Aquibium microcysteis sp. nov., is NIBR3T (=KACC 22092T=HAMBI 3738T). We also reclassified Mesorhizobium carbonis and M. oceanicum as Aquibium carbonis comb. nov. and A. oceanicum comb. nov., respectively.

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Manganese reductive dissolution coupled to Sb mobilization in contaminated shooting range soil

Costa,

Martinez,

Suleiman

et al. 2024

Appl Microbiol Biotechnol

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A “redox-stat” RMnR bioreactor was employed to simulate moderately reducing conditions (+ 420 mV) in Sb-contaminated shooting range soils for approximately 3 months, thermodynamically favoring Mn(IV) reduction. The impact of moderately reducing conditions on elemental mobilization (Mn, Sb, Fe) and speciation [Sb(III) versus Sb(V); Fe2+/Fe3+] was compared to a control bioreactor RCTRL without a fixed redox potential. In both bioreactors, reducing conditions were accompanied by an increase in effluent Sb(V) and Mn(II) concentrations, suggesting that Sb(V) was released through microbial reduction of Mn oxyhydroxide minerals. This was underlined by multiple linear regression analysis showing a significant (p < 0.05) relationship between Mn and Sb effluent concentrations. Mn concentration was the sole variable exhibiting a statistically significant effect on Sb in RMnR, while under the more reducing conditions in RCTRL, pH and redox potential were also significant. Analysis of the bacterial community composition revealed an increase in the genera Azoarcus, Flavisolibacter, Luteimonas, and Mesorhizobium concerning the initial soil, some of which are possible key players in the process of Sb mobilization. The overall amount of Sb released in the RMnR (10.40%) was virtually the same as in the RCTRL (10.37%), which underlines a subordinate role of anoxic processes, such as Fe-reductive dissolution, in Sb mobilization. This research underscores the central role of relatively low concentrations of Mn oxyhydroxides in influencing the fate of trace elements. Our study also demonstrates that bioreactors operated as redox-stats represent versatile tools that allow quantifying the contribution of specific mechanisms determining the fate of trace elements in contaminated soils. Key points • “Redox-stat” reactors elucidate Sb mobilization mechanisms • Mn oxyhydroxides microbial reductive dissolution has a major role in Sb mobilization in soils under moderately reducing conditions • Despite aging the soil exhibited significant Sb mobilization potential, emphasizing persistent environmental effects

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Mesorhizobium denitrificans sp. nov., a novel denitrifying bacterium isolated from sludge

Cited by 15 publications

References 17 publications

Inoculation effect of Pseudomonas sp. TF716 on N2O emissions during rhizoremediation of diesel-contaminated soil

Inoculation effect of Pseudomonas sp. TF716 on N2O emissions during rhizoremediation of diesel-contaminated soil

Aquibium microcysteis gen. nov., sp. nov., isolated from a Microcystis aeruginosa culture and reclassification of Mesorhizobium carbonis as Aquibium carbonis comb. nov. and Mesorhizobium oceanicum as Aquibium oceanicum comb. nov

Manganese reductive dissolution coupled to Sb mobilization in contaminated shooting range soil

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