Phenotypic expression of Vogesella indigofera upon exposure to hexavalent chromium, Cr6+
| Autor: | Ji-Dong Gu, K.H. Cheung |
|---|---|
| Rok vydání: | 2001 |
| Předmět: |
biology
Physiology General Medicine Vogesella indigofera biology.organism_classification Applied Microbiology and Biotechnology Indigofera Microbiology Agar plate Pigment chemistry.chemical_compound chemistry visual_art visual_art.visual_art_medium Eubacterium Hexavalent chromium Bacteria Nutrient agar Biotechnology |
| Zdroj: | World Journal of Microbiology and Biotechnology. 17:475-480 |
| ISSN: | 0959-3993 |
| DOI: | 10.1023/a:1011966725978 |
| Popis: | A eubacterium producing a blue pigment was isolated from a drinking water filter, and subsequently identified as Vogesella indigofera. This bacterium was further investigated for its morphological and biochemical characteristics after exposure to hexavalent chromium, Cr6+. The threshold Cr6+ concentration inhibiting the pigment production by V. indigofera was 200–300 μg ml−1 in liquid cultures of nutrient broth and 100–150 μg ml−1 on nutrient agar plates. The Cr6+ concentration preventing V. indigofera growth was 300–400 μg ml−1 in liquid cultures, but greater than 150 μg ml−1 on agar plates. Moreover, rugose colonies without the blue pigmentation were observed on agar plates amended with 150 (μg Cr6+) ml−1. The biochemical utilization profiles of the colonies without pigmentation did not differ from the original pigment-producing ones, indicating phenotypic plasticity of this bacterium. The difference of phenotypic expression of V. indigofera under various Cr6+ concentrations might have potential application as a pollution bioindicator for heavy metals. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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