Table 1.
Zinc tolerance of the LAB strains against different zinc concentrations
| Strain code | Inhibition zone (mm) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Zn2+ concentration (mM) | ||||||||||
| 20 | 40 | 60 | 80 | 100 | 200 | 300 | 400 | 500 | 600 | |
| TA4a | R(–) | R(–) | R(–) | R(–) | R(–) | R(–) | R(–) | R(0.5) | R(1) | S(1.2) |
| TP2 | R(–) | R(–) | R(–) | R(–) | R(0.5) | S(2) | S(3) | S(4) | S(4.5) | S(6) |
| TP6 | R(–) | R(–) | R(–) | R(–) | R(–) | S(2) | S(4) | S(4) | S(4) | S(5) |
| SC2 | R(–) | R(–) | R(–) | R(1) | R(1) | S(1.5) | S(3) | S(4) | S(4.5) | S(6) |
| SC4 | R(–) | R(0.5) | R(0.5) | R(1) | R(1) | S(2) | S(3) | S(4) | S(4.5) | S(5) |
| SC7 | R(–) | R(–) | R(–) | R(–) | R(–) | R(1) | S(2) | S(2) | S(3) | S(4.5) |
| SC8a | R(–) | R(–) | R(–) | R(–) | R(–) | R(0.5) | R(0.5) | R(1) | R(1) | S(1.5) |
| MP3 | R(–) | R(–) | R(–) | R(0.5) | R(0.5) | S(2) | S(2) | S(2) | S(3) | S(4) |
| MP6 | R(–) | R(–) | R(0.5) | R(1) | R(1) | S(2) | S(4) | S(4.5) | S(4.5) | S(5) |
| FF2a | R(–) | R(–) | R(–) | R(–) | R(–) | R(–) | R(1) | R(1) | R(1) | S(2) |
| FF4 | R(–) | R(–) | R(–) | R(–) | R(–) | S(2) | S(2.5) | S(3) | S(3) | S(4) |
| MPJ1 | R(–) | R(–) | R(–) | R(–) | R(–) | S(2) | S(3) | S(3.5) | S(4) | S(6) |
| MPJ2 | R(–) | R(–) | R(–) | R(–) | R(–) | S(1.5) | S(2) | S(3) | S(5) | S(5) |
| MPJ4 | R(–) | R(–) | R(–) | R(–) | R(–) | S(2) | S(2) | S(3) | S(4) | S(5) |
| MPJ5 | R(–) | R(–) | R(0.5) | R(0.5) | R(1) | S(2) | S(3) | S(5) | S(5) | S(5.5) |
| MPJ7 | R(–) | R(–) | R(–) | R(–) | R(–) | S(2.5) | S(3) | S(4) | S(5) | S(5) |
| MPJ9 | R(–) | R(–) | R(–) | R(–) | R(–) | S(2) | S(2.5) | S(2.5) | S(4) | S(5) |
| MPJ10a | R(–) | R(–) | R(–) | R(–) | R(–) | R(0.5) | R(0.5) | R(1) | R(1) | S(2) |
The results of the inhibition zone are shown in parenthesis
S sensitive (≥ 1.5 mm), R resistant (≤ 1 mm)
aIndicating the strains that exhibited the highest MTC value