Benzo[a]pyrene removal by Marasmiellus troyanus in soil microcosms

Nemergut, DR Wunch, KG Johnson, RM Bennett, JW

Dr. Nemergut et al., Benzo[a]pyrene removal by Marasmiellus troyanus in soil microcosms, J IND MIC B, 25(2), 2000, pp. 116-119

33

INGLESE

Article

Biotecnology & Applied Microbiology",Microbiology

JOURNAL OF INDUSTRIAL MICROBIOLOGY & BIOTECHNOLOGY

1367-5435 → ACNP

25

2

2000

116 - 119

ISI

1367-5435(200008)25:2<116:BRBMTI>2.0.ZU;2-R

Benzo[a]pyrene (B [a] P) is a carcinogenic polyaromatic hydrocarbon that en ters the environment as an incomplete combustion production of fossil fuels . Several species of filamentous fungi are capable of biotransforming and/o r mineralizing B[a]P in liquid cultures, however there has been less succes s in soil habitats. In this study, the litter rot fungus Marasmiellus troya nus was encapsulated in alginate and delivered to B [ a] P-spiked soil micr ocosms (100 mu g B [a] P/g soil) for 1, 2 and 6 weeks, with and without a f ertilizer solution. After 2 weeks, 32.5% of B [a] P was recovered from soil microcosms treated with M. troyanus compared to 55-70% for controls. After 6 weeks, controls demonstrated an average percent recovery of B[a] P of 54 % while M. troyanus-inoculated samples gave an average percent recovery of 11%, Similar bioaugmentation of contaminated habitats with appropriately fo rmulated fungi has potential for practical bioremediation in soil environme nts.