Table 2.

Antibacterial activity of Lp. plantarum strains against Ps. syringae pv. syringae by agar diffusion assay.

LAB Strain	Treatment
	CFS	Trypsin	pH	Proteinase K	Catalase	Boiling
	Inhibition Zone, mm
C6	16.00 ± 1.02 d**	3.10 ± 0.79 c	1.17 ± 0.36 b	0.00 a	0.00 a	3.03 ± 0.33 c**
D16	23.67 ± 0.93 d**	0.00 a	0.00 a	0.00 a	18.00 ± 1.36 d**	0.00 a
I6	16.00 ± 0.85 d**	0.00 a	2.03 ± 0.26 d**	1.67 ± 0.59 b	0.00 a	0.00 a
L1	12.17 ± 0.76 c	26.67 ± 0.92 e**	0.00 a	0.00 a	1.33 ± 0.23 b	0.00 a
K1	2.33 ± 0.65 a	0.00 a	1.63 ± 0.37 c	0.00 a	0.00 a	0.00 a
Q3	15.67 ± 0.83 d**	5.33 ± 0.46 d**	1.77 ± 0.59 cd**	2.50 ± 0.74 c**	0.00 a	0.00 a
Q4	23.67 ± 0.98 e**	3.17 ± 0.85 c	2.53 ± 0.83 e**	0.00 a	2.33 ± 0.47 c**	1.90 ± 0.42 b**
S1	5.80 ± 0.57 b	2.00 ± 0.45 b	2.00 ± 0.72 d**	0.00 a	2.23 ± 0.49 c**	0.00 a
S4	1.70 ± 0.32 a	0.00 a	0.00 a	1.330 ± 0.46 b	1.70 ± 0.39 bc	0.00 a

Note: CFS—cell-free supernatant, Trypsin—CFS + trypsin of 1 mg/mL, pH—pH adjusted from 3.5–4.2 to 6.5, Proteinase K—CFS + proteinase K (100 U/mg), Catalase—CFS + catalase (5 mg), Boiling—boiling of CFS for 20 min. The antibacterial activity was expressed as follows: strong (10 mm of inhibition zone between the well and fungal growth); a = week growth (less than < 3 mm); b = medium inhibition (>8 mm); c = strong inhibition (>10 mm of inhibition zone). Means with different letters (a–e) in the same column differ at a p < 0.05 level of probability by the LSD test; ± SD—standard deviation; ** indicates high significance (p < 0.05).