Volatiles from Subtropical Convolvulaceae That Interfere with Bacterial Cell-to-Cell Communication as Potential Antipathogenic Drugs

Table 1

Yields, UV absorptions, and antibacterial and antibiofilm activities of Convolvulaceae extracts.

Plants	Extract	Yield (%)	UV nm (Abs)	P. aeruginosa ATCC 27853				S. aureus ATCC 6538 P
				OD600 nm	Growth	OD540 nm	Biofilm	OD560 nm	Growth	OD540 nm	Biofilm
				0.887 ± 0.08	100%	0.390 ± 0.05	100%	1.516 ± 0.02	100%	0.420 ± 0.08	100%
I. cairica	DEF	0.35	298 (0.734)	0.168 ± 0.082	19%	0.246 ± 0.001	63%	1.367 ± 0.071	90%	0.113 ± 0.05	27%
	DEL	0.51	325 (1.105)	0.165 ± 0.003	19%	0.246 ± 0.001	63%	1.493 ± 0.033	98%	0.097 ± 0.001	23%
			351 (0.933)
	MEF	2.55	302 (1.697)	1.078 ± 0.075	122%	0.144 ± 0.014	37%	1.136 ± 0.141	75%	0.004 ± 0.001	1%
	MEL	2.88	304 (1.200)	1.212 ± 0.084	137%	0.101 ± 0.020	26%	1.311 ± 0.098	87%	0.021 ± 0.025	5%
I. nil	DEF	0.26	304 (1.181)	0.095 ± 0.045	11%	0.374 ± 0.05	96%	1.310 ± 0.084	86%	0.076 ± 0.021	18%
			380 (0.729)
	DEL	0.46	322 (0.904)	0.301 ± 0.053	34%	0.400 ± 0.189	102%	1.352 ± 0.048	89%	0.067 ± 0.042	16%
			343 (0.861)
	MEF	1.43	298 (1.005)	0.864 ± 0.081	97%	0.183 ± 0.001	47%	1.406 ± 0.131	93%	0.021 ± 0.013	5%
	MEL	3.11	304 (0.845)	1.042 ± 0.065	118%	0.226 ± 0.018	58%	1.297 ± 0.099	86%	0.063 ± 0.02	15%
I. purpurea	DEF	0.43	300 (1.013)	0.154 ± 0.007	17%	0.261 ± 0.015	67%	1.314 ± 0.066	86%	0.063 ± 0.01	15%
	DEL	1.45	263 (0.136)	0.114 ± 0.053	13%	0.420 ± 0.05	108%	1.516 ± 0.108	100%	0.122 ± 0.05	29%
	MEF	3.05	302 (1.853)	1.123 ± 0.081	127%	0.148 ± 0.021	38%	1.547 ± 0.105	102%	0.055 ± 0.01	13%
			351 (1.450)
	MEL	2.13	318 (2.171)	1.115 ± 0.075	126%	0.214 ± 0.032	55%	1.441 ± 0.076	95%	0.067 ± 0.02	16%
			351 (1.450)
M. dissecta	DEF	0.06	305 (0.76)	0.141 ± 0.017	16%	0.296 ± 0.04	76%	1.365 ± 0.120	90%	0.038 ± 0.01	9%
	DEL	0.90	322 (1.368)	0.129 ± 0.013	15%	0. 078 ± 0.03	20%	1.243 ± 0.060	82%	0.063 ± 0.03	15%
			351 (1.184)
	MEF	1.57	351 (1.390)	0.297 ± 0.014	34%	0.136 ± 0.000	35%	1.330 ± 0.123	88%	0.000 ± 0.001	0%
			367 (1.517)
	MEL	1.94	330 (2.447)	0.793 ± 0.061	89%	0.257 ± 0.03	66%	1.434 ± 0.095	95%	0.034 ± 0.02	8%
			351 (1.799)

I.: Ipomoea. M.: Merremia. DEF: diethyl ether extracts from flowers. DEL: diethyl ether extracts from leaves.
MEF: methanol extracts from flowers. MEL: methanol extracts from leaves.
All experiments showed significant differences with the controls (, ).