Services on Demand
Journal
Article
Indicators
- Cited by SciELO
- Access statistics
Related links
- Cited by Google
- Similars in SciELO
- Similars in Google
Share
Acta Biológica Colombiana
Print version ISSN 0120-548X
Abstract
VALERO VALERO, NELSON; RODRIGUEZ SALAZAR, LUZ NIDIA; MANCILLA GOMEZ, SANDRA and CONTRERAS BAYONA, LEYDIS. Obtaining Low Rank Coal Biotransforming Bacteria from Microhabitats Enriched with Carbonaceos Residues. Acta biol.Colomb. [online]. 2012, vol.17, n.2, pp.337-350. ISSN 0120-548X.
Bacteria capable of low rank coal (LRC) biotransform were isolated from environmental samples altered with coal in the mine "The Cerrejon". A protocol was designed to select strains more capable of LRC biotransform, the protocol includes isolation in a selective medium with LRC powder, qualitative and quantitative tests for LRC solubilization in solid and liquid culture medium. Of 75 bacterial strains isolated, 32 showed growth in minimal salts agar with 5 % carbon. The strains that produce higher values of humic substances (HS) have a mechanism of solubilization associated with pH changes in the culture medium, probably related to the production of extracellular alkaline substances by bacteria. The largest number of strains and bacteria with more solubilizing activity on LRC were isolated from sludge with high content of carbon residue and rhizosphere of Typha domingensis and Cenchrus ciliaris grown on sediments mixed with carbon particles, this result suggests that obtaining and solubilization capacity of LRC by bacteria may be related to the microhabitat where the populations originated.
Keywords : Solubilization; TTypha domingensis; Cenchrus ciliaris; humic substances; microhabitat.