Table 2.
Comparison of chitinolytic enzyme, protease and αGI production by various bacteria using SPP as C/N source.
| Strain | Activity (U/mL) | ||||
|---|---|---|---|---|---|
| Exochitinase | Chitinase | Chitosanase | Protease | aGI | |
| Paenibacillus macerans TKU029 | - | 0.376 + 0.026 | 0.857 + 0.015 | 0.135 ± 0.011 | 60.13 ± 6.844 |
| P. mucilaginosus TKU032 | - | 0.101 + 0.017 | 0.155 + 0.016 | 0.193 ± 0.005 | 175.40 ± 0.606 |
| Paenibacillus sp. TKU037 | - | 0.105 + 0.018 | 0.247 + 0.014 | 0.222 ± 0.004 | 175.80 ± 0.851 |
| Paenibacillus sp.TKU042 | - | 0.185 + 0.019 | 0.928 + 0.014 | 0.199 + 0.005 | 88.30 ± 4.502 |
| Bacillus licheniformis TKU004 | 1.211 + 0.017 | 0.074 + 0.017 | 0.120 + 0.014 | 0.707 + 0.020 | 174.59 ± 4.295 |
| Bacillus subtilis TKU007 | - | 0.118 + 0.017 | 0.314 + 0.017 | 0.219 + 0.005 | 58.64 ± 7.368 |
| Lactobacillus paracasei TKU010 | - | - | 0.166 + 0.015 | 0.090 + 0.010 | - |
| Serratia marcescens TKU011 | 8.039 + 0.296 | 0.177 + 0.018 | 0.150 + 0.013 | 0.477 + 0.010 | - |
| Serratia ureilytica TKU013 | 11.545 + 0.431 | 0.319 + 0.019 | 0.112 + 0.013 | 0.910 + 0.031 | 52.60 ± 8.418 |
| Pseudomonas tamsuii TKU015 | - | 0.105 + 0.015 | 0.056 + 0.013 | 0.113 + 0.009 | - |
| Serratia sp. TKU016 | - | 0.111 + 0.018 | 0.302 + 0.012 | 0.370 + 0.012 | - |
| Serratia sp. TKU020 | 9.327 + 0.325 | 0.201 + 0.018 | 0.118 + 0.014 | 0.478 + 0.021 | 52.49 ± 0.778 |
| Bacillus cereus TKU028 | - | 0.223 + 0.018 | 0.520 + 0.015 | 0.153 + 0.007 | 68.64 ± 3.972 |
| Bacillus mycoildes TKU038 | - | 0.332 + 0.019 | 0.611 + 0.016 | 0.240 + 0.004 | 71.46 ± 3.635 |
| Bacillus mycoildes TKU040 | - | 0.350 + 0.016 | 0.165 + 0.013 | 0.083 + 0.011 | - |
| Rhizobium sp.TKU041 | - | - | - | 0.198 + 0.012 | - |
SPP was used at the sole C/N source with a concentration of 1% (w/v). Culture conditions were set at 37 °C, 150 rpm shaking speed, 100/250 mL (volume of medium/flask) for two days. The cultures of fermented deCSP were obtained and centrifuged at 12,000× g for 20 min to collect the culture supernatants. (-) expressed activity lower than 0.1 U/mL and 10 U/mL for exochitinase and αGI, respectively.