TABLE 3.
Phenol oxidase activity and gene copy numbers of Streptomyces two-domain LMCOs in composting samplesa
| Day | Phenol oxidase activity (μmol h−1 g−1) |
Streptomyces two-domain LMCO gene abundance (no. of copies g−1 × 106) | ||
|---|---|---|---|---|
| pH 4.5 | pH 6.0 | pH 8.0 | ||
| 0 | 4.22 (0.11) a | 4.21 (0.15) a | 5.84 (0.13) a | 1.35 (0.06) a |
| 4 | 6.96 (0.15) b | 6.35 (0.12) b | 10.06 (0.22) b | 2.68 (0.12) b |
| 8 | 2.95 (0.23) c | 8.91 (0.28) c | 13.49 (0.35) c | 3.56 (0.14) c |
| 15 | 6.78 (0.20) bd | 6.27 (0.21) b | 11.54 (0.19) d | 2.86 (0.09) b |
| 30 | 6.42 (0.18) de | 5.03 (0.19) d | 12.95 (0.24) e | 3.46 (0.10) c |
| 50 | 6.24 (0.13) e | 4.76 (0.23) d | 9.65 (0.18) b | 3.26 (0.15) c |
a
Means are shown with standard deviations in parentheses (n = 3). ABTS was used as the substrate at pH 4.5 and l-DOPA at pH 6.0 and 8.0. Means with different letters in the same column are significantly different (P < 0.05).