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Effect of hybrid poplar trees on microbial populations important to hazardous waste bioremediation
Author(s) -
Jordahl James L.,
Foster Lesley,
Schnoor Jerald L.,
Alvarez Pedro J. J.
Publication year - 1997
Publication title -
environmental toxicology and chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.1
H-Index - 171
eISSN - 1552-8618
pISSN - 0730-7268
DOI - 10.1002/etc.5620160630
Subject(s) - rhizosphere , bioremediation , soil water , total petroleum hydrocarbon , bulk soil , environmental chemistry , biology , microbial population biology , environmental science , ecology , contamination , chemistry , bacteria , genetics
Microbial concentrations of denitrifiers, pseudomonads, and monoaromatic petroleum hydrocarbon (BTX) degraders were significantly higher ( p < 0.1) in soil samples from the rhizosphere of poplar trees than in adjacent agricultural soils, and atrazine degraders were found only in one rhizosphere sample. The relative abundance of these phenotypes (as a fraction of total heterotrophs) was not significantly different between rhizosphere and surrounding soils. Therefore, the poplar rhizosphere enhanced the growth of microbial populations that participate in natural bioremediation without exerting selective pressure for them.