Bioremediation of hexavalent chromate using permeabilized Brevibacterium sp. and Stenotrophomonas sp. cells

Ge, Shimei; Ge, Shichao; Zhou, Maohong; Dong, Xiaoyan

doi:10.1016/j.jenvman.2015.04.011

Cited by 31 publications

(18 citation statements)

References 34 publications

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“…In some niches, Stenotrophomonas can degrade a variety of xenobiotic compounds [45], such as chlorpyrifos, methyl parathion, methyl paraoxon, diazinon, phoxim, parathion, profenofos, and triazophos [46]. Thus, Stenotrophomonas plays a significant role in the bioremediation of polluted sites, especially those with Cr [47]. They could promote plant growth or be biological control agents of plant pathogens that rely on their phytohormones [48] and chitinolytic [49].…”

Section: Discussionmentioning

confidence: 99%

Changes in soil bacterial community structure as a result of incorporation of Brassica plants compared with continuous planting eggplant and chemical disinfection in greenhouses

Liu

Zheng

et al. 2017

PLoS ONE

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Greenhouse eggplant monocropping in China has contributed to the aggravation of soil-borne diseases, reductions in crop quality and yield, and the degradation of physical and chemical soil properties. Crop rotation is one effective way of alleviating the problems of continuous cropping worldwide; however, few studies have reported changes in soil bacterial community structures and physical and chemical soil properties after Brassica vegetables had been rotated with eggplant in greenhouses. In this experiment, mustard-eggplant (BFN) and oilseed rape-eggplant (BFC) rotations were studied to identify changes in the physicochemical properties and bacterial community structure in soil that was previously subject to monocropping. Samples were taken after two types of Brassica plants incorporated into soil for 15 days to compare with continually planted eggplant (control, CN) and chemical disinfection of soil (CF) in greenhouses. MiSeq pyrosequencing was used to analyze soil bacterial diversity and structure in the four different treatments. A total of 55,129 reads were identified, and rarefaction analysis showed that the soil treatments were equally sampled. The bacterial richness of the BFC treatment and the diversity of the BFN treatment were significantly higher than those of the other treatments. Further comparison showed that the bacterial community structures of BFC and BFN treatments were also different from CN and CF treatments. The relative abundance of several dominant bacterial genera in the BFC and BFN treatments (such as Flavobacteria, Stenotrophomonas, Massilia and Cellvibrio, which played different roles in improving soil fertility and advancing plant growth) was distinctly higher than the CN or CF treatments. Additionally, the total organic matter and Olsen-P content of the BFC and BFN treatments were significantly greater than the CN treatment. We conclude that Brassica vegetables-eggplant crop rotations could provide a more effective means of solving the problems of greenhouse eggplant monocultures.

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Section: Discussionmentioning

confidence: 99%

Changes in soil bacterial community structure as a result of incorporation of Brassica plants compared with continuous planting eggplant and chemical disinfection in greenhouses

Liu

Zheng

et al. 2017

PLoS ONE

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“…Whereas the presence of Mg 2+ , Ba 2+ , Al 3+ has no effect on Cr (VI) reduction potential of Stenotrophomonas sp. D6 (Ge et al ). In this study, Co 2+ , Mg 2+ , Fe 2+ , Ba 2+ , Al 3+ , Cu 2+ metal cations decrease the overall Cr (VI) reduction to 77–66% of isolate M5 as compared to control flask.…”

Section: Discussionmentioning

confidence: 99%

“…K1 and Stenotrophomonas sp. D6 formed in the presence of Triton X-100 reduced 4Á83 mg l À1 of Cr (VI) from wastewater on successive treatment twice using which is a chemical surfactant (Ge et al 2015), whereas in this study, the cells of isolate M5 with compromised cell membranes obtained after treatment of cells with biological surfactant under optimized condition could reduce 40Á56 AE 0Á5% of 50 mg l À1 Cr (VI) added to Tris-HCl buffer (pH 9Á0) in 20 h. To the best of our knowledge, this is first study where biosurfactant is used for making permeabilized cells which is more environmental friendly as compared to use of chemical surfactants for reduction of Cr (VI). These findings also showed that permeabilized cells of M5 were more effective then resting cells under nongrowth conditions and could be used as potential biological tool for treatment of industrial wastewater…”

Section: Discussionmentioning

confidence: 99%

Reduction of hexavalent chromium (VI) by indigenous alkaliphilic and halotolerantMicrobacteriumsp. M5: comparative studies under growth and nongrowth conditions

Kumar

Saini

2019

J Appl Microbiol

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Aims To evaluate hexavalent chromium (Cr (VI)) reduction potential of indigenous isolate M5, under growing and nongrowing conditions. Methods and Results Microbacterium sp. M5 was isolated from soil samples collected from a common effluent treatment plant, after enrichment of indigenous microbial diversity in the presence of 200 mg l−1 of Cr (VI). The isolate achieved complete reduction of 400 mg l−1 Cr (VI) supplement to Luria Bertani medium having initial pH of 9·0 after 48 h incubation. Furthermore, the reduction potential of resting and surfactant treated cell membrane compromised cells of M5 was evaluated. The control and biosurfactant treated cells achieved 22·71 ± 0·5% and 40·56 ± 0·5% reduction of 50 mg l−1 Cr (VI) in Tris‐HCl buffer, under resting cells conditions. To the best of our knowledge, this is the first report where cells with compromised cell membrane obtained after exposure to biosurfactant have been evaluated for Cr (VI) reduction. Conclusion The Cr (VI) reduction potential of Microbacterium sp. M5 could be effectively exploited for treatment of chromium‐rich effluents, under nongrowing conditions. Significance and Impact of the Study The isolate M5 could be a potential inoculum for effluent treatment plants as it is able to support Cr (VI) reduction under wide range of pH, salinity and in the presence of different metal ions.

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“…All three species showed remarkable physiological characteristics. Many authors suggested that microorganisms thriving in extreme environments are excellent candidates for biotechnological applications [20,[22][23][24][25][26][27][28][29][30][31]. Physiological adaptation to acidic conditions grants them great potential in bioremediation of metals.…”

Section: Discussionmentioning

confidence: 99%

“…For example the work carried out by Bankar et al [21] in which the yeasts Yarrowia lipolytica was able to capture Cr 6þ at pH 1. Also, many authors have suggested that microorganisms inhabiting extreme environments would be more suitable for bioremediation porpoises [20,[22][23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Heavy metal capture by autochthonous yeasts from a volcanic influenced environment of Patagonia

Russo

Libkind

Giraudo

et al. 2016

J. Basic Microbiol.

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Heavy metals at elevated concentrations are a major threat to agricultural and human health. Typically, human activities tend to release these metals to the environment in aqueous solutions, generating high levels of pollution due to the mobility of the heavy metals. The aim of the present work was to assess heavy metal tolerance in yeasts isolated from Río Agrio - Lake Caviahue volcanic acidic aquatic environment and to evaluate the capacity of selected strains to capture metals in acidic culture media conditions. The ability of three yeast species, Cryptococcus agrionensis, Cryptococcus sp. 2, and Coniochaeta fodinicola, to tolerate and capture metals in live cultures has been evaluated. These three yeast species showed high tolerance to low pH and elevated concentrations of metals, thus implying their autochthonous status. Minimal inhibitory concentration (MIC) for growth obtained for these isolates showed elevated tolerance to the six heavy metals evaluated and were significantly higher than those registered for other microorganisms. C. agrionensis was able to capture 15.80 mg (g biomass) of Cu (MIC: 0.22 g L ), Cryptococcus sp. 2 was able to capture 36.25 and 65.28 mg (g biomass) of Ni and Zn , respectively (MIC: 0.56 and 1.68, respectively), and C. fodinicola was able to capture 67.11 mg (g biomass) of Zn (MIC: 3.75). This work reported the ability of yeasts to capture metals in acidic conditions for the first time. We hope that it represents the step-stone for future researches in the ability and metabolism of yeasts form acidic aquatic environment related to metal tolerance and capture.

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Bioremediation of hexavalent chromate using permeabilized Brevibacterium sp. and Stenotrophomonas sp. cells

Cited by 31 publications

References 34 publications

Changes in soil bacterial community structure as a result of incorporation of Brassica plants compared with continuous planting eggplant and chemical disinfection in greenhouses

Changes in soil bacterial community structure as a result of incorporation of Brassica plants compared with continuous planting eggplant and chemical disinfection in greenhouses

Reduction of hexavalent chromium (VI) by indigenous alkaliphilic and halotolerantMicrobacteriumsp. M5: comparative studies under growth and nongrowth conditions

Heavy metal capture by autochthonous yeasts from a volcanic influenced environment of Patagonia

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