The fluorescence spectra parameters of EPS in the samples treated with different AHLsa.
| Samples | Peaks | Ex/Em (nm) | Fluorescence intensity | Chemical components | PN (mg mg−1 DCW) | PS (mg mg−1 DCW) |
|---|---|---|---|---|---|---|
| Control group | A | 275/328 | 966.34 | Tryptophan PN-like substances | 45.21 | 30.07 |
| B | 225/324 | 1907.89 | Aromatic PN-like substances | |||
| C6-HSL treated group | A | 275/326 | 1444.38 | Tryptophan PN-like substances | 71.89 | 28.78 |
| B | 225/324 | 2813.01 | Aromatic PN-like substances | |||
| C8-HSL treated group | A | 275/324 | 1152.73 | Tryptophan PN-like substances | 63.34 | 27.19 |
| B | 225/326 | 2247.89 | Aromatic PN-like substances | |||
| 3-oxo-C10-HSL treated group | A | 275/330 | 533.29 | Tryptophan PN-like substances | 33.11 | 16.22 |
| B | 225/326 | 1009.01 | Aromatic PN-like substances |
a
The experimental groups were all treated with 10 nmol L−1 AHLs and cultivated for 24 h.