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. 2019 Apr 8;8:70. Originally published 2019 Jan 18. [Version 2] doi: 10.12688/f1000research.17430.2

Figure 6. Effect of GA, quercetin, and catechin on C. violaceum.

Figure 6.

Bacterial growth was measured as OD 764; OD of violacein was measured at 585 nm, and Violacein Unit was calculated as the ratio OD 585/OD 764 (an indication of violacein production per unit of growth) ‘Control’ in this figure is the vehicle control (0.5%v/v DMSO), which did not exert any effect on growth and violacein production of C. violaceum. ( A) Effect of gallic acid on growth and violacein production in C. violaceum. ( B) GA acts as a signal-supply inhibitor. ( C) Effect of quercetin on growth and violacein production in C. violaceum. ( D) Quercetin acts as a signal-response inhibitor. ( E) Effect of catechin on growth and violacein production in C. violaceum. ( F) Catechin acts as a signal-response inhibitor. *p<0.05, **p<0.01, ***p<0.001. QS, quorum sensing; GA, gallic acid.