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Distribution of petroleum degrading genes and factor analysis of petroleum contaminated soil from the Dagang Oilfield, China.

Liu Q, Tang J, Bai Z, Hecker M, Giesy JP - Sci Rep (2015)

Bottom Line: Numbers of copies of AlkB ranged between 9.1 × 10(5) and 1.9 × 10(7) copies/g dry mass (dm) soil, and were positively correlated with total concentrations of PHs (TPH) (R(2) = 0.573, p = 0.032) and alkanes (C33 ~ C40) (R(2) = 0.914, p < 0.01).The Nah gene was distributed relatively evenly among sampling zones, ranging between 1.9 × 10(7) and 1.1 × 10(8) copies/g dm soil, and was negatively correlated with concentrations of total aromatic hydrocarbons (TAH) (R(2) = -0.567, p = 0.035) and ∑16 PAHs (R(2) = -0.599, p = 0.023).Results of a factor analysis showed that individual samples of soils were not ordinated as a function of the zones.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Engineering Center of Pollution Diagnosis and Environmental Restoration, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.

ABSTRACT
Genes that encode for enzymes that can degrade petroleum hydrocarbons (PHs) are critical for the ability of microorganisms to bioremediate soils contaminated with PHs. Distributions of two petroleum-degrading genes AlkB and Nah in soils collected from three zones of the Dagang Oilfield, Tianjin, China were investigated. Numbers of copies of AlkB ranged between 9.1 × 10(5) and 1.9 × 10(7) copies/g dry mass (dm) soil, and were positively correlated with total concentrations of PHs (TPH) (R(2) = 0.573, p = 0.032) and alkanes (C33 ~ C40) (R(2) = 0.914, p < 0.01). The Nah gene was distributed relatively evenly among sampling zones, ranging between 1.9 × 10(7) and 1.1 × 10(8) copies/g dm soil, and was negatively correlated with concentrations of total aromatic hydrocarbons (TAH) (R(2) = -0.567, p = 0.035) and ∑16 PAHs (R(2) = -0.599, p = 0.023). Results of a factor analysis showed that individual samples of soils were not ordinated as a function of the zones.

No MeSH data available.


Correlations between numbers of copies of genes involved in degradation with the responding petroleum components.
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f3: Correlations between numbers of copies of genes involved in degradation with the responding petroleum components.

Mentions: Numbers of copies of AlkB were positively correlated with various petroleum components, including TPHs (R2 = 0.573, p = 0.032) and long-chain alkanes (C33 ~ C40) (R2 = 0.914, p < 0.01) (Fig. 3). Soils collected from the oil-producing zone, which contained greater concentrations of alkanes exhibited the greatest numbers of copies of AlkB. Numbers of copies of Nah were negatively correlated with TAH (R2 = −0.567, p = 0.035) and ∑16 PAHs (R2 = −0.599, p = 0.023) (Fig. 3).


Distribution of petroleum degrading genes and factor analysis of petroleum contaminated soil from the Dagang Oilfield, China.

Liu Q, Tang J, Bai Z, Hecker M, Giesy JP - Sci Rep (2015)

Correlations between numbers of copies of genes involved in degradation with the responding petroleum components.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4478889&req=5

f3: Correlations between numbers of copies of genes involved in degradation with the responding petroleum components.
Mentions: Numbers of copies of AlkB were positively correlated with various petroleum components, including TPHs (R2 = 0.573, p = 0.032) and long-chain alkanes (C33 ~ C40) (R2 = 0.914, p < 0.01) (Fig. 3). Soils collected from the oil-producing zone, which contained greater concentrations of alkanes exhibited the greatest numbers of copies of AlkB. Numbers of copies of Nah were negatively correlated with TAH (R2 = −0.567, p = 0.035) and ∑16 PAHs (R2 = −0.599, p = 0.023) (Fig. 3).

Bottom Line: Numbers of copies of AlkB ranged between 9.1 × 10(5) and 1.9 × 10(7) copies/g dry mass (dm) soil, and were positively correlated with total concentrations of PHs (TPH) (R(2) = 0.573, p = 0.032) and alkanes (C33 ~ C40) (R(2) = 0.914, p < 0.01).The Nah gene was distributed relatively evenly among sampling zones, ranging between 1.9 × 10(7) and 1.1 × 10(8) copies/g dm soil, and was negatively correlated with concentrations of total aromatic hydrocarbons (TAH) (R(2) = -0.567, p = 0.035) and ∑16 PAHs (R(2) = -0.599, p = 0.023).Results of a factor analysis showed that individual samples of soils were not ordinated as a function of the zones.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Engineering Center of Pollution Diagnosis and Environmental Restoration, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.

ABSTRACT
Genes that encode for enzymes that can degrade petroleum hydrocarbons (PHs) are critical for the ability of microorganisms to bioremediate soils contaminated with PHs. Distributions of two petroleum-degrading genes AlkB and Nah in soils collected from three zones of the Dagang Oilfield, Tianjin, China were investigated. Numbers of copies of AlkB ranged between 9.1 × 10(5) and 1.9 × 10(7) copies/g dry mass (dm) soil, and were positively correlated with total concentrations of PHs (TPH) (R(2) = 0.573, p = 0.032) and alkanes (C33 ~ C40) (R(2) = 0.914, p < 0.01). The Nah gene was distributed relatively evenly among sampling zones, ranging between 1.9 × 10(7) and 1.1 × 10(8) copies/g dm soil, and was negatively correlated with concentrations of total aromatic hydrocarbons (TAH) (R(2) = -0.567, p = 0.035) and ∑16 PAHs (R(2) = -0.599, p = 0.023). Results of a factor analysis showed that individual samples of soils were not ordinated as a function of the zones.

No MeSH data available.