TABLE 2.
Antagonistic activity of extracellular protease-producing strains
| Indicator strain | Accession no. (16S rRNA gene) | Diam (mean ± SD) of inhibition zone (mm)a |
|||||
|---|---|---|---|---|---|---|---|
| FL94 | FL176 | J7 | 1.6994 | ZJ1 | LN10 | ||
| Haloarcula sp. LN121 | MN826836 | 0 | 0 | 0 | 0 | 0 | 0 |
| Haloarcula sp. H4 | MN893883 | 15.0 ± 1.7 | 21.7 ± 2.8 | 23.7 ± 2.0 | 0 | 0 | 0 |
| Natronomonas sp. LN108 | MN826835 | 0 | 0 | 8.0 ± 0.0 | 0 | 0 | 0 |
| Halorubrum sp. LN10 | MN826830 | 7.3 ± 1.2 | 0 | 7.0 ± 1.0 | 8.7 ± 2.1 | 0 | 0 |
| Halorubrum sp. LN187 | MN826837 | 9.0 ± 1.0 | 0 | 0 | 0 | 0 | 0 |
| Halorubrum sp. LN60 | MN826834 | 7.7 ± 1.5 | 0 | 11.7 ± 2.0 | 29.7 ± 1.5 | 0 | 0 |
| Halorubrum sp. LN11 | MN826831 | 0 | 0 | 8.0 ± 1.0 | 0 | 0 | 0 |
| Halorubrum sp. FL23 | MT573937 | 18.5 ± 0.7 | 27.5 ± 0.7 | 9.1 ± 0.7 | 0 | 0 | 0 |
| Halorubrum sp. FL32 | MT573938 | 12.0 ± 0.5 | 28.5 ± 0.7 | 8.3 ± 1.0 | 0 | 0 | 0 |
| Halorubrum sp. Y13 | MN826840 | 0 | 0 | 0 | 0 | 0 | 0 |
| Halorubrum sp. LN185 | MN893884 | 0 | 0 | 7.0 ± 1.0 | 0 | 0 | 0 |
| Haloferax sp. Q22 | KJ644210 | 0 | 8.7 ± 1.5 | 21.7 ± 3.0 | 0 | 0 | 0 |
| Halobaculum roseum D90 | KX376701 | 8.7 ± 1.5 | 8.0 ± 1.0 | 24.7 ± 2.1 | 0 | 0 | 0 |
| Haloarchaeobius sp. FL94 | MN833417 | 0 | 0 | 0 | 0 | 0 | 0 |
| Halalkalicoccus subterraneus GSM28 | MG097856 | 0 | 0 | 10.7 ± 0.5 | 0 | 0 | 0 |
| Halococcus salsus ZJ1 | MG097854 | 0 | 0 | 0 | 0 | 0 | 0 |
| Halorhabdus sp. FL145 | MN098869 | 0 | 0 | 0 | 0 | 0 | 0 |
a
Zero indicates no inhibition activity; the diameter of the lawn for each strain on the indicator plate was about 6 mm, and the diameters (mean value ± SD) of their inhibition zones are shown. FL94, Haloarchaeobius sp. FL94; FL176, Haloarchaeobius sp. FL176; J7, Natrialba sp. J7; 1.6994, Halococcus saccharolyticus CGMCC 1.6994 (see Table 5); ZJ1, Halococcus salsus ZJ1; LN10, Halorubrum sp. LN10. Strains FL94, FL176, J7, and 1.6994 are four extracellular protease-producing haloarchaeal strains (see Fig. S1 in the supplemental material). Strains ZJ1 and LN10 were used as negative controls. These data were derived from three biological replicates.