Isolation of indigenous Staphylococcus sciuri from chromium-contaminated paddy field and its application for reduction of Cr(VI) in rice plants cultivated in pots
| Autor: | Jayanta Debabrata Choudhury, Sayanti Ghosh, Riddhi Mahansaria, Malancha Roy, Tarit Roychowdhury, Joydeep Mukherjee, Asish Kumar Ghosh, Avishek Dutta |
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| Rok vydání: | 2017 |
| Předmět: |
0301 basic medicine
biology Chemistry chemistry.chemical_element food and beverages 010501 environmental sciences Contamination biology.organism_classification 01 natural sciences Enrichment culture World health 03 medical and health sciences Chromium Horticulture 030104 developmental biology Agronomy Soil water Staphylococcus sciuri Paddy field Rice plant 0105 earth and related environmental sciences General Environmental Science |
| DOI: | 10.6084/m9.figshare.4749706.v1 |
| Popis: | Accumulation of Cr(VI) in rice seeds cultivated in Cr-contaminated soil of the Sundarbans (India) is an environmental problem. Cr(VI) concentration in this soil was 6.2 ± 0.3 mg/kg, whereas total chromium was 32.04 ± 1.60 mg/kg. A Cr(VI)-removing bacterium isolated from Cr-contaminated paddy field soil of Sundarbans was identified as Staphylococcus sciuri. Enrichment culture of S. sciuri was applied to pot cultivation of rice in Cr-contaminated soil. After 8 weeks, 71 ± 3% Cr(VI) (final concentration 2.15 ± 0.01 mg/kg) and 65 ± 2% total Cr removal (end concentration 11.3 ± 0.5 mg/kg) were attained in bacterium-treated soils. Growth parameters indicated healthy development of plants cultivated in bacterium-treated soils that was not observed in control plants. Total Cr removal attained in rice seeds of plants cultivated in bacterium-treated soils compared with control rice seeds was 78 ± 4%. Total Cr concentration in test seeds was 0.72 ± 0.05 mg/kg (World Health Organization [WHO] permissible limit: 1.30 mg/kg), whereas the same in control seeds was 3.27 ± 0.16 mg/kg. Cr(VI) reduction achieved in rice seeds cultivated in bacterium-treated soil compared with control rice seeds was 95 ± 5%. Cr(VI) concentration in rice seeds cultivated in treated soil was 0.050 ± 0.003 mg/kg, whereas the same in untreated control was 0.93 ± 0.05 mg/kg. Successful paddy field soil bioremediation by any Staphylococcus species was demonstrated for the first time. |
| Databáze: | OpenAIRE |
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