2.3. Culture conditions and fungal inoculums
Polyporus sp. S133 was selected based on its ability to degrade
chrysene in a solid medium containing 20 ml of malt extract with
the addition of chrysene dissolved in dimethylformamyde (DMF)
and 300mg l−1 chloramphenicol or benomill followed by incubation
at roomtemperature fortwoweeks and observeddaily.Asingle
colony of chrysene-degrading fungus was transferred to mineral
salt broth medium containing chrysene. The fungus used in the
present research was capable of utilizing chrysene as determined
using mineral salt broth (MSB) medium containing (in g/l distilled
water): glucose (10), KH2PO4 (2), MgSO4·7H2O (0.5), CaCl2·2H2O
(0.1), ammonium tartrate (0.2), and trace elements (10 ml) [23].
The pH of the medium was adjusted to 5.7. The fungal inoculum
was prepared by growing each fungus on malt extract agar plates at
25 ◦C for 7 days. The inoculumwas added to a flask containing mineral
salt broth medium. Flasks were shaken at 120rpm for 3 days
at 25 ◦C, and filtered through filter paper under sterile conditions.
Mycelia were then added to each vial.
2.3. Culture conditions and fungal inoculums
Polyporus sp. S133 was selected based on its ability to degrade
chrysene in a solid medium containing 20 ml of malt extract with
the addition of chrysene dissolved in dimethylformamyde (DMF)
and 300mg l−1 chloramphenicol or benomill followed by incubation
at roomtemperature fortwoweeks and observeddaily.Asingle
colony of chrysene-degrading fungus was transferred to mineral
salt broth medium containing chrysene. The fungus used in the
present research was capable of utilizing chrysene as determined
using mineral salt broth (MSB) medium containing (in g/l distilled
water): glucose (10), KH2PO4 (2), MgSO4·7H2O (0.5), CaCl2·2H2O
(0.1), ammonium tartrate (0.2), and trace elements (10 ml) [23].
The pH of the medium was adjusted to 5.7. The fungal inoculum
was prepared by growing each fungus on malt extract agar plates at
25 ◦C for 7 days. The inoculumwas added to a flask containing mineral
salt broth medium. Flasks were shaken at 120rpm for 3 days
at 25 ◦C, and filtered through filter paper under sterile conditions.
Mycelia were then added to each vial.
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