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Electronic Journal of Biotechnology
Universidad Católica de Valparaíso
ISSN: 0717-3458
Vol. 16, No. 5, 2013
Bioline Code: ej13056
Full paper language: English
Document type: Research Article
Document available free of charge

Electronic Journal of Biotechnology, Vol. 16, No. 5, 2013

 en The bacterial community structure in an alkaline saline soil spiked with anthracene
Castro-Silva, Carolina; Ruíz-Valdiviezo, Víctor M.; Valenzuela-Encinas, César; Alcántara-Hernández, Rocio J.; Navarro-Noya, Yendi E.; Vázquez-Núñez, Edgar; Luna-Guido, Marco; Marsch, Rodolfo & Dendooven, Luc


Background: The application of polycyclic aromatic hydrocarbons (PAHs) will affect the bacterial community structure as some groups will be favoured and others not. An alkaline saline soil with electrolytic conductivity (EC) 56 dS m-1 was spiked with anthracene and acetone while their effect on bacterial community structure was investigated.
Results: The percentages of Acidobacteria and Actinobacteria decreased over time, while the percentage of Proteobacteria, mostly Xanthomonadales, increased. The percentage of the phylotypes belonging to the Nocardioides check for this species in other resources , Rhodococcus check for this species in other resources and Streptomyces check for this species in other resources , known degraders of PAHs, was larger in the anthracene-amended soil than in the acetone-amended and unamended soil at day 14. The phylotypes belonging to the genera Sphingomonas check for this species in other resources , also a known degrader of PAHs, however, was lower. Weighted and unweighted PCoA with UniFrac indicated that phylotypes were similar in the different treatments at day 0, but changed at day 1. After 14 days, phylotypes in the unamended and acetone-amended soil were similar, but different from those in the anthracene-spiked soil.
Conclusions: It was found that incubating the soil and contaminating it with anthracene changed the bacterial community structure, but spiking the soil with acetone had little or no effect on the bacterial community structure compared to the unamended soil.

C dynamics,; N mineralization; phylogenetic analysis; polycyclic aromatic; hydrocarbons; principal component analysis; UniFrac

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