Broad Spectrum Anti-Quorum Sensing Activity of Tannin-Rich Crude Extracts of Indian Medicinal Plants

Table 3

Quantitative studies of anti-quorum sensing activity detected as β-lactamase activity in biosensor strain S. aureus agrP3::blaZ in the presence of subinhibitory concentrations of plant extracts.

Plant	%  -lactamase activity with respect to untreated control ( = MIC in mg/mL)
	P. emblica	20.9 ± 7.87	37.9 ± 2.43	34.5 ± 3.25	39.1 ± 2.47	63.6 ± 13.08
T. bellirica	16.3 ± 2.45	5.6 ± 2.11	36.9 ± 3.55	43.5 ± 4.33	80.2 ± 6.32
T. chebula	7.5 ± 5.85	18.9 ± 2.69	24.7 ± 5.70	28.4 ± 9.48	30.2 ± 4.18
P. granatum	14.6 ± 5.13	21.3 ± 2.54	20.8 ± 6.26	33.2 ± 7.79	51.1 ± 11.24
S. cumini	6.5 ± 2.12	22.4 ± 0.77	28.1 ± 5.06	39.6 ± 5.25	46.0 ± 4.07
M. indica (flower)	0.0	0.0	80.3 ± 9.71	82.7 ± 10.71	82.3 ± 14.53
E. ribes	57.4 ± 16.45	65.8 ± 5.28	65.0 ± 7.00	70.3 ± 9.27	97.7 ± 13.19
A. arabica	33.0 ± 1.97	32.5 ± 6.34	34.5 ± 4.61	55.2 ± 3.72	61.8 ± 2.65
M. indica (seed)	0.0	28.4 ± 10.25	53.8 ± 2.27	52.4 ± 4.77	54.6 ± 1.87
T. arjuna	52.6 ± 9.95	53.7 ± 15.32	50.2 ± 1.64	52.3 ± 3.46	60.6 ± 6.83
C. equisetifolia	37.0 ± 8.53	38.3 ± 7.22	59.7 ± 2.46	64.8 ± 9.49	64.4 ± 6.56
T. populnea	13.0 ± 8.80	22.7 ± 2.84	38.5 ± 3.59	55.5 ± 1.22	57.8 ± 6.28