Table 1.
Isolates | pH 5* | Level** | pH 6.5 | Level | pH 8 | Level |
---|---|---|---|---|---|---|
P. pentosaceus B12m9 | 1.17 ± 0.03Aa | +++ | 1.00 ± 0.00ABCb | ++ | 0.90 ± 0.00CDc | + |
P. pentosaceus TB-1 | 1.20 ± 0.00Aa | +++ | 0.87 ± 0.03Eb | + | 0.90 ± 0.00CDb | + |
P. pentosaceus TL-3 | 1.17 ± 0.03Aa | +++ | 0.97 ± 0.03BCDb | + | 0.97 ± 0.03BCb | + |
P. pentosaceus TP-3 | 1.13 ± 0.03ABa | +++ | 0.90 ± 0.00DEb | + | 0.93 ± 0.03BCb | + |
P. pentosaceus TP-4 | 1.13 ± 0.03ABa | +++ | 0.93 ± 0.03CDEb | + | 0.90 ± 0.00CDb | + |
P. pentosaceus TP-8 | 1.13 ± 0.03ABa | +++ | 0.93 ± 0.03CDEb | + | 0.90 ± 0.00CDb | + |
P. acidilactici TB-2 | 1.13 ± 0.03ABa | +++ | 0.93 ± 0.03CDEb | + | 0.83 ± 0.03DEb | + |
P. acidilactici TP-6 | 1.10 ± 0.00ABa | +++ | 0.90 ± 0.00DEb | + | 0.80 ± 0.00Ec | + |
L. plantarum TL-1 | 1.13 ± 0.03ABa | +++ | 0.93 ± 0.03CDEb | + | 0.90 ± 0.00CDb | + |
L. plantarum TL-2 | 1.20 ± 0.00Aa | +++ | 1.00 ± 0.00ABCb | ++ | 1.00 ± 0.00Bb | ++ |
L. plantarum TP-2 | 1.13 ± 0.03ABa | +++ | 1.03 ± 0.03ABa | ++ | 1.07 ± 0.03Aa | ++ |
L. plantarum TP-5 | 1.20 ± 0.00Aa | +++ | 1.07 ± 0.03Ab | ++ | 1.10 ± 0.00Ab | +++ |
L. plantarum RI11 | 1.13 ± 0.03ABa | +++ | 1.00 ± 0.00ABCb | ++ | 0.90 ± 0.00CDv | + |
L. plantarum RG11 | 1.07 ± 0.03Ba | ++ | 0.93 ± 0.03CDEb | + | 0.93 ± 0.03BCb | + |
L. plantarum RG14 | 1.17 ± 0.03Aa | +++ | 0.97 ± 0.03BCDb | + | 0.93 ± 0.03BCb | + |
L. plantarum RS5 | 1.07 ± 0.03Ba | ++ | 0.93 ± 0.03CDEb | + | 0.93 ± 0.03BCb | + |
L. plantarum I-UL4 | 1.13 ± 0.03ABa | +++ | 0.97 ± 0.03BCDb | + | 0.93 ± 0.03BCb | + |
*Values are mean ± standard error of the mean (SEM), n = 3. Mean ± SEM within the same column that share a similar capital letter superscript (A-E) are not significantly different (P > 0.05) while means within the same row that bear a common small letter superscript (a-c) indicate no significant difference (P > 0.05)
**The level of proteolytic activity was assigned based on the diameter of clear hydrolysis zone such that: ‘+’ indicates < 1.0 cm; ‘++’ indicates ≥1.0 cm but < 1.10 cm whereas ‘+++’ indicates ≥1.10 cm