Polyphenolic Contents and Biological Activities of Rumex ecklonianus.

Figures & data

Table 1 Polyphenol contents and antioxidant activity of the different extracts of R. ecklonianus..

Extracts	Total polyphenol (mg tannic acid/g)	Total flavonoids (mg quercetin/g)	Total flavonols (mg quercetin/g)	Total proanthocyanidins (mg catechin/g)	FRAP (μ mol Fe II/g)
Acetone	12.27 ± 0.67	1.26 ± 0.08	0.84 ± 0.05	3.05 ± 0.61	384.64 ± 48.28
Methanol	26.78 ± 1.05	1.70 ± 0.11	1.07 ± 0.01	5.61 ± 0.36	707.26 ± 54.36
Water	3.49 ± 0.33	0.45 ± 0.01	0.05 ± 0.02	1.78 ± 0.25	47.88 ± 1.21

n = 3, X ± SD. Means along the same column with different superscripts are significantly different at p < 0.05.

Values are expressed per gram of plant dry weight.

Figure 1 DPPH radical scavenging activities of the different extracts of R. ecklonianus..

Figure 2 ABTS radical scavenging activities of the different extracts of R. ecklonianus..

Figure 3 Correlations between FRAP and total phenolic contents of R. ecklonianus..

Figure 4 Correlations between FRAP and total flavonoid contents of R. ecklonianus..

Figure 5 Correlations between FRAP and total flavonol contents of R. ecklonianus..

Figure 6 Correlations between FRAP and total proanthocyanidin contents of R. ecklonianus..

Table 2 Antibacterial activity of the different extracts of R. ecklonianus..

		Minimum inhibitory concentration (mg/ml)
Bacteria	Gram +/−	Acetone	Methanol	Water	Streptomycin	Chloramphenicol
Bacillus cereus.	+	−	2.0	—	1.0	0.13
Staphylococcus epidermidis.	+	−	—	–^a	1.0	0.25
Staphylococcus aureus.	+	2.0	—	—	1.0	1.0
Micrococcus kristinae.	+	2.0	—	5.0	0.5	0.5
Streptococcus pyogenes.	+	2.0	2.0	—	1.0	1.0
Escherichia coli.	−	2.0	2.0	2.0	> 1.0	1.0
Salmonella pooni.	−	—	—	—	1.0	0.13
Serratia marcescens.	−	2.0	—	5.0	1.0	0.13
Pseudomonas aeruginosa.	−	2.0	5.0^b	—	< 5.0	< 2
Klebsiella pneumoniae.	−	2.0	—	—	> 1.0	0.63

^aNot active at 2 mg mL^{− 1}.

^bMaximum concentration of extract tested.