Abstract
Commelinaceae is used for ethnobotany. However, bioactive compounds information of this family is few data. The aim here was to determine the bioactive compounds and quantify the antioxidant activity from leaves 10 species. Twenty amino acids were identified using LC/MS/MS. The antioxidant contents were evaluated by the total phenolic and total flavonoid content assays. The individual phenolic acids, flavonoids and vitamin c were identified by HPLC. The antioxidant activities detected were DPPH scavenging and FRAP assay. The total amino acids found in most samples studied ranging from 239 to 1012 µg/g DW. Vitamin C contents were in the range of 23 to 195 mg/100 g DW. Total phenolic and total flavonoid contents ranged from 11.3 to 35.7 mg GAE/g DW and 56.7 to 368.7 mg RE/100 g DW, respectively. All the species studied possessed strong antioxidant properties (DPPH and FRAP). This result can be applied for further development of functional foods or cosmetics.
Highlights
Commelinaceae is an important tropical and subtropical plant found worldwide
C. clavata C.B.Clarke and C. fragrans (Lindl.) Woodson were the richest source of phenolic acid and flavonoids, followed by C. diffusa Burmf
Our findings suggest that C. clavata C.B.Clarke was the most promising source of bioactive compounds
Summary
Commelinaceae is an important tropical and subtropical plant found worldwide. There are approximately 37 genera with over 600 species discovered (Edeoga and Ogbebor, 1999). The dominant characteristic of the family is succulent stems and sheathing leaves (Wilson, 1981). Many species of this family are grown ornamental plants and for ethnobotany (González-Avila et al, 2003; Mensah et al, 2006; AlonsoCastro et al, 2011; Myriam et al, 2011). Thailand has one of the richest Commetlinaceae floras in the world. North-eastern Thailand provides a unique environment for the nurture of specific genotypes, being unusually dry and elevated. The biologically active compounds of many of these genotypes have never been reported. Reports on the amino acids and vitamin c have been slight with limited information of phytochemicals along with the biological activities of these plants
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