Table 2.
List of archaea possessing the tnaA gene and/or indole producing activity.
| Organism | Unique Growth Requirements | Indole | Biofilm (EPS or QS Signal) | References | |
|---|---|---|---|---|---|
| Gene (NCBI) | Production | ||||
| Aeropyrum pernix K1 | Thermophile, 90 °C | + | − | − | [147] |
| Halalkalicoccus jeotgali B3 | 1.70–5.1 M NaCl | + | + | − | [131] |
| Halanaeroarchaeum sulfurireducens strain HSR2 | 3–5 M NaCl | + | NR | − | [148] |
| Halanaeroarchaeum sulfurireducens strain M27-SA2 | 3–5 M NaCl | + | NR | − | [149] |
| Haloarcula hispanica ATCC 33960 | 1.70–5.1 M NaCl | + | + | EPS | [132] [150] |
| Haloarcula hispanica N601 | + | +/− | EPS | ||
| Haloarcula marismortui ATCC 43049 | + | − | EPS | ||
| Haloarcula taiwanensis strain Taiwanensis | + | NR | NR | ||
| Haloarcula sp. CBA1115 | + | ||||
| Halobacterium hubeiense strain JI20-1 | + | ||||
| Halobacterium salinarum NRC-1 | 3.5–5 M NaCl | + | NR | + | |
| Halobacterium salinarum R1 | 4.2 M NaCl | + | NR | EPS/AHL | |
| Halobiforma lacisalsi AJ5 | >1.7 M NaCl | + | − | − | |
| Haloferax alexandrinus strain wsp1 | 4.3 M NaCl | + | + | − | [140] |
| Haloferax gibbonsii strain ARA6 | 1.7–4.3 M NaCl | + | + | EPS | |
| Haloferax mediterranei ATCC 33500 | 1–5.2 M NaCl | + | + | EPS | |
| Haloferax volcanii DS2 | 2.6–4.3 M NaCl | + | NR | +/AHLs | |
| Halogeometricum borinquense DSM 11551 | 3.4–4.3 M NaCl | + | + | +/AHLs | |
| Halopiger xanaduensis SH-6 | 4.3 M NaCl | + | − | − | |
| Haloprofundus sp. MHR1 | 0.9–4.8 M NaCl | + | − | − | |
| Halostagnicola larsenii XH-48 | 2.5–5.0 M NaCl | + | − | − | |
| Halostella pelagica strain DL-M4 | 2.6 M NaCl | + | NA | − | |
| Haloterrigena daqingensis strain JX313 | 1.7–5.5 M NaCl | + | − | − | |
| Haloterrigena jeotgali strain A29 | 2.6–3.4 M NaCl | + | + | − | |
| Haloterrigena turkmenica DSM 5511 | 2.6–3.4 M NaCl | + | NA | NA | |
| Natrarchaeobaculum sulfurireducens strain AArc1 | 3–5 M NaCl | + | − | NA | |
| Natrialba magadii ATCC 43099 | 3.4 M NaCl | + | NR | NA | |
| Natrinema pallidum strain BOL6-1 | 3.4–4.3 M NaCl | + | − | NA | |
| Natrinema pellirubrum DSM 15624 | 3.4–4.3 M NaCl | + | − | NA | |
| Natrinema versiforme strain BOL5-4 | 3.4–4.3 M NaCl | + | + | NA | |
| Natronobacterium gregoryi SP2 | 2.0–5 M NaCl | + | NR | NA | |
| Natronococcus occultus SP4 | 2 M NaCl | + | NR | AHL/Biofilm | |
| Natronorubrum aibiense strain 7-3 | 2.0–4.3 M NaCl | + | + | NA | [142] |
| Natronorubrum bangense strain JCM 10635 | 2.0–4.3 M NaCl | + | + | NA | [144] |
NR: not reported; NA: not available; AHL: Acyl-homoserine lactone; EPS: extracellular polymeric substance. + positive; − negative.