Bioremediation of chromium(VI) contaminated soil by <i>Streptomyces</i> sp. MC1

Polti, Marta Alejandra; García, Roberto O.; Amoroso, Maria Julia del R.; Abate, Carlos Mauricio

doi:10.1002/jobm.200800239

Cited by 98 publications

(56 citation statements)

References 37 publications

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“…Cr(VI) reduction in minimal medium is much more time-consuming than in complex medium. Polti et al (2009Polti et al ( , 2010 Streptomyces sp. MC1 to reduce Cr(VI) to Cr(III) under different culture conditions: Cr(VI) reduction reached 45% after 3 days in minimal medium with glucose as carbon source.…”

Section: Discussionmentioning

confidence: 99%

“…MC1, a sugar cane isolated (Polti et al 2007). This strain in particular was able to reduce Cr(VI) in liquid minimal medium, soil extract, and soil samples, demonstrating its potential use in bioremediation processes (Polti et al 2009). Also, they characterized the chromate reductase enzyme from this strain.…”

Section: Introductionmentioning

confidence: 97%

“…Metal-resistant actinobacteria, and their potential use for bioremediation strategies, have been described before (Amoroso et al 1998;Albarracín et al 2005Albarracín et al , 2008aKothe et al 2005;Schmidt et al 2005;Polti et al 2007Polti et al , 2009). Among the soil filamentous microorganisms, streptomycetes represent up to 20% of soil bacteria .…”

Section: Introductionmentioning

confidence: 99%

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Intracellular chromium accumulation by Streptomyces sp. MC1

Polti

Amoroso

Abate

2010

Water Air Soil Pollut

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Streptomyces sp. MC1, previously isolated from sugar cane, has shown ability to reduce Cr(VI) in liquid minimal medium and soil samples. The objective of this work was to demonstrate the intracellular chromium accumulation by Streptomyces sp. MC1 under different culture conditions. This strain was able to accumulate up to 3.54 mg of Cr (III) per gram of wet biomass, reducing the 98% of Cr (VI) and removing 13.9% of chromium from the culture medium supernatants. Streptomyces sp. MC1 chromium bioaccumulation ability was corroborated by using Timm's reagent technique, a low-cost method, which has been used by first time to detect chromium deposits in bacteria. The results of atomic absorption spectrometry, scanning electron microscopy, and energy dispersive X-ray analysis suggest that the mechanism of Cr(VI) resistance observed in Streptomyces sp. MC1 includes adsorption coupled with reduction to Cr(III), and finally, Cr(III) bioaccumulation. This mechanism have special relevance to remediation of Cr(VI) contaminated environments by Streptomyces sp. MC1.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Intracellular chromium accumulation by Streptomyces sp. MC1

Polti

Amoroso

Abate

2010

Water Air Soil Pollut

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“…[13] and Arthrobacter sp. [14] and actinomycetes [15]. The response of microorganisms towards toxic heavy metals is of importance in view of their interest in the reclamation of polluted sites.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of remediation in heavy metal tolerance and removal by Comamonas acidovorans MTCC 3364

Rudakiya¹,

Pawar²

2013

IOSR-JESTFT

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“…Amoroso et al (2001), reported on Cr(VI) bioaccumulation by Streptomyces strains, whereas Laxman and More (2002) determined Cr(VI) reduction by Streptomyces griseus. Polti et al (2009), determined Cr(VI) reduction by Streptomyces sp. MC1 and later on characterize its chromate reductase activity (Polti et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Antibiotic Resistance and Chromium Reduction Pattern Among Actinomycetes

Ali¹

2012

American Journal of Biochemistry and Biotechnology

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Actinomycetes, one of the most important groups of microbes, exhibit many interesting activities such as degradation and transformation of organic and metal substrates together with production of antibiotics. With these bioactivities, actinomycetes would play an important role in the webs of the marine environment. The present study was designed to evaluate the antibiotic resistance pattern, antibiotic producing potential and chromium resistance as well as chromium reduction potential of a range of actinomycetes isolated from marine environments. Actinomycetes were isolated from marine sediment samples obtained from St. Martin's Island in Bangladesh. Antibiotic resistance among the selected isolates was studied against 10 different antibiotics by disc diffusion method and antibiotic producing potential was assessed by the perpendicular streak method. The isolates were screened for resistance towards heavy metal Cr(VI) on culture plates supplemented with Cr(VI) at concentrations ranging from 1-5 mM of Cr(VI). Highly resistant isolates were subjected to screening for Cr(VI) reduction activity, which was estimated using the Cr(VI) specific colorimetric reagent 1, 5-diphenylcarbazide. Out of the total 30 different selected isolates, 25 (83.33%) showed resistance against more than three antibiotics and 6 (20%) showed resistance to more than six antibiotics. Ninety three percent of the isolates showed MAR index greater than 0.2 and tolerance to Cr(VI) at 1mM of initial Cr(VI). None of the isolates displayed antimicrobial activity against the organisms tested. Among the isolates tested for chromate reduction, two were most efficient showing complete reduction of 1mM Cr(VI) within 24 h. These two isolates were capable of reducing chromate even at high initial Cr(VI) concentrations. Remarkably, the isolate SM-11 was found to reduce 82.67%, 44.34% of Cr(VI) at 2.5mM, 5mM of initial Cr(VI) concentrations respectively, within 72h of incubation. The majority of the actinomycetes isolates displayed resistance to both antibiotics and heavy metal chromium which indicates the possible acquisition of resistance factors due to environmental or human activities. The study also demonstrates possible correlation between antibiotic resistance and metal tolerance. Two of the isolates which showed considerable chromium reduction activity even at high chromium concentrations, may find potential application in bioremediation approaches.

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Bioremediation of chromium(VI) contaminated soil by Streptomyces sp. MC1

Cited by 98 publications

References 37 publications

Intracellular chromium accumulation by Streptomyces sp. MC1

Intracellular chromium accumulation by Streptomyces sp. MC1

Evaluation of remediation in heavy metal tolerance and removal by Comamonas acidovorans MTCC 3364

Antibiotic Resistance and Chromium Reduction Pattern Among Actinomycetes

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