1 research outputs found
The bacterial community structure in an alkaline saline soil spiked with anthracene
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 , Rhodococcus and Streptomyces , 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 , 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